/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:04:57,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:04:57,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:04:57,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 04:04:57,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 04:04:57,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 04:04:57,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 04:04:57,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 04:04:57,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 04:04:57,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 04:04:57,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 04:04:57,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 04:04:57,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 04:04:57,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 04:04:57,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 04:04:57,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 04:04:57,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 04:04:57,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 04:04:57,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 04:04:57,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 04:04:57,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 04:04:57,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 04:04:57,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 04:04:57,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 04:04:57,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 04:04:57,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:04:57,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:04:57,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:04:57,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:04:57,328 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:04:57,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:04:57,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:04:57,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:04:57,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:04:57,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:04:57,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:04:57,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:04:57,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:04:57,330 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:04:57,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:04:57,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:04:57,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:04:57,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:04:57,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:04:57,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:04:57,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:04:57,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:04:57,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:04:57,331 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:04:57,332 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:04:57,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:04:57,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:04:57,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:04:57,539 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:04:57,542 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:04:57,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-15 04:04:57,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c8d87fc/d1a58e33f706499f887c254c8f27b3c3/FLAG031b48bcd [2022-02-15 04:04:57,909 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:04:57,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-02-15 04:04:57,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c8d87fc/d1a58e33f706499f887c254c8f27b3c3/FLAG031b48bcd [2022-02-15 04:04:58,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c8d87fc/d1a58e33f706499f887c254c8f27b3c3 [2022-02-15 04:04:58,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:04:58,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:04:58,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:04:58,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:04:58,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:04:58,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175dbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58, skipping insertion in model container [2022-02-15 04:04:58,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:04:58,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:04:58,504 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-02-15 04:04:58,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:04:58,556 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:04:58,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-02-15 04:04:58,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:04:58,615 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:04:58,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58 WrapperNode [2022-02-15 04:04:58,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:04:58,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:04:58,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:04:58,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:04:58,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:04:58,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:04:58,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:04:58,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:04:58,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (1/1) ... [2022-02-15 04:04:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:04:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:04:58,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 04:04:58,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 04:04:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:04:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:04:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 04:04:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:04:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 04:04:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-02-15 04:04:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-02-15 04:04:58,718 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2022-02-15 04:04:58,718 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-02-15 04:04:58,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:04:58,718 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-15 04:04:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-15 04:04:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-02-15 04:04:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:04:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:04:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 04:04:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:04:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-15 04:04:58,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-15 04:04:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:04:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:04:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:04:58,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:04:58,833 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:04:58,834 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:04:59,028 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:04:59,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:04:59,038 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-02-15 04:04:59,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:04:59 BoogieIcfgContainer [2022-02-15 04:04:59,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:04:59,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:04:59,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:04:59,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:04:59,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:04:58" (1/3) ... [2022-02-15 04:04:59,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3072974b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:04:59, skipping insertion in model container [2022-02-15 04:04:59,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:04:58" (2/3) ... [2022-02-15 04:04:59,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3072974b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:04:59, skipping insertion in model container [2022-02-15 04:04:59,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:04:59" (3/3) ... [2022-02-15 04:04:59,048 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-02-15 04:04:59,051 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:04:59,051 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:04:59,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:04:59,095 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-02-15 04:04:59,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:04:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 04:04:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 04:04:59,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:04:59,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:04:59,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:04:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:04:59,129 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 1 times [2022-02-15 04:04:59,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:04:59,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746055322] [2022-02-15 04:04:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:04:59,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:04:59,185 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:04:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:04:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:04:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:04:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:04:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:04:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:04:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:04:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 04:04:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:04:59,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:04:59,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746055322] [2022-02-15 04:04:59,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746055322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:04:59,417 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:04:59,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:04:59,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032964533] [2022-02-15 04:04:59,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:04:59,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:04:59,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:04:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:04:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:04:59,448 INFO L87 Difference]: Start difference. First operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:04:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:04:59,626 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-15 04:04:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 04:04:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-02-15 04:04:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:04:59,633 INFO L225 Difference]: With dead ends: 127 [2022-02-15 04:04:59,634 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 04:04:59,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:04:59,639 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 81 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:04:59,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:04:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 04:04:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-02-15 04:04:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 04:04:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-02-15 04:04:59,676 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2022-02-15 04:04:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:04:59,676 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-02-15 04:04:59,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:04:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-02-15 04:04:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 04:04:59,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:04:59,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:04:59,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:04:59,678 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:04:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:04:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 1 times [2022-02-15 04:04:59,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:04:59,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932450648] [2022-02-15 04:04:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:04:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:04:59,682 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:04:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:04:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:04:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:04:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:04:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:04:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:04:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 04:04:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-02-15 04:04:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:04:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:04:59,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:04:59,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932450648] [2022-02-15 04:04:59,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932450648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:04:59,889 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:04:59,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 04:04:59,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638648894] [2022-02-15 04:04:59,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:04:59,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 04:04:59,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:04:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 04:04:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:04:59,891 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:00,181 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-02-15 04:05:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 04:05:00,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-02-15 04:05:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:00,185 INFO L225 Difference]: With dead ends: 81 [2022-02-15 04:05:00,185 INFO L226 Difference]: Without dead ends: 65 [2022-02-15 04:05:00,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:05:00,187 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:00,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 55 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 04:05:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-15 04:05:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-02-15 04:05:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-15 04:05:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-02-15 04:05:00,214 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2022-02-15 04:05:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-02-15 04:05:00,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-02-15 04:05:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 04:05:00,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:00,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:00,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:05:00,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 1 times [2022-02-15 04:05:00,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:00,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513296850] [2022-02-15 04:05:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:00,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:00,223 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 04:05:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 04:05:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-15 04:05:00,560 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:00,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513296850] [2022-02-15 04:05:00,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513296850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:00,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:00,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 04:05:00,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698061519] [2022-02-15 04:05:00,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:00,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 04:05:00,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 04:05:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:05:00,564 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 04:05:02,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:03,358 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-02-15 04:05:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 04:05:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-02-15 04:05:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:03,360 INFO L225 Difference]: With dead ends: 81 [2022-02-15 04:05:03,360 INFO L226 Difference]: Without dead ends: 79 [2022-02-15 04:05:03,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-02-15 04:05:03,361 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 163 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:03,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 62 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 649 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 04:05:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-15 04:05:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-02-15 04:05:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.18) internal successors, (59), 51 states have internal predecessors, (59), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-15 04:05:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-02-15 04:05:03,370 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 56 [2022-02-15 04:05:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:03,371 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-02-15 04:05:03,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-15 04:05:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-02-15 04:05:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 04:05:03,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:03,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:03,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:05:03,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1653895387, now seen corresponding path program 1 times [2022-02-15 04:05:03,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:03,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522036524] [2022-02-15 04:05:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:03,374 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 04:05:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 04:05:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:03,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:03,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522036524] [2022-02-15 04:05:03,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522036524] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:03,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:03,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:05:03,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787104723] [2022-02-15 04:05:03,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:03,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:05:03,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:05:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:05:03,536 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:05,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:07,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:09,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:11,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:12,332 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-02-15 04:05:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:05:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-02-15 04:05:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:12,333 INFO L225 Difference]: With dead ends: 115 [2022-02-15 04:05:12,334 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 04:05:12,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-15 04:05:12,335 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 56 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:12,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 52 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 318 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-02-15 04:05:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 04:05:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-02-15 04:05:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-15 04:05:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-02-15 04:05:12,348 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 60 [2022-02-15 04:05:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:12,350 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-02-15 04:05:12,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-02-15 04:05:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 04:05:12,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:12,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:12,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:05:12,353 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash 812630909, now seen corresponding path program 2 times [2022-02-15 04:05:12,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:12,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903418684] [2022-02-15 04:05:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:12,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:12,356 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 04:05:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:12,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:12,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903418684] [2022-02-15 04:05:12,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1903418684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:12,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:12,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 04:05:12,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050938347] [2022-02-15 04:05:12,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:12,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 04:05:12,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:12,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 04:05:12,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-15 04:05:12,630 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:14,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:15,521 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2022-02-15 04:05:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 04:05:15,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-02-15 04:05:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:15,523 INFO L225 Difference]: With dead ends: 116 [2022-02-15 04:05:15,523 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 04:05:15,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-15 04:05:15,524 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:15,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 66 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 805 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 04:05:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 04:05:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-02-15 04:05:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.206896551724138) internal successors, (70), 62 states have internal predecessors, (70), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (16), 12 states have call predecessors, (16), 13 states have call successors, (16) [2022-02-15 04:05:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-02-15 04:05:15,534 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 62 [2022-02-15 04:05:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-02-15 04:05:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-02-15 04:05:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 04:05:15,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:15,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:15,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:05:15,536 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 1 times [2022-02-15 04:05:15,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:15,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610007346] [2022-02-15 04:05:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:15,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:15,537 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 04:05:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-02-15 04:05:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 04:05:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:15,646 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:15,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610007346] [2022-02-15 04:05:15,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1610007346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:15,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:15,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 04:05:15,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562130817] [2022-02-15 04:05:15,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:15,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 04:05:15,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 04:05:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-15 04:05:15,648 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 04:05:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:15,989 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-02-15 04:05:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:05:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-02-15 04:05:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:15,990 INFO L225 Difference]: With dead ends: 106 [2022-02-15 04:05:15,990 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 04:05:15,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-15 04:05:15,992 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 92 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:15,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 56 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:05:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 04:05:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-15 04:05:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 15 states have call successors, (15), 11 states have call predecessors, (15), 11 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2022-02-15 04:05:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-02-15 04:05:16,011 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 64 [2022-02-15 04:05:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:16,012 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-02-15 04:05:16,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 04:05:16,012 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-02-15 04:05:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 04:05:16,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:16,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:16,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:05:16,013 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1958796481, now seen corresponding path program 2 times [2022-02-15 04:05:16,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:16,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948165132] [2022-02-15 04:05:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:16,015 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 04:05:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 04:05:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:16,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:16,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948165132] [2022-02-15 04:05:16,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948165132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:16,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:16,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 04:05:16,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142556417] [2022-02-15 04:05:16,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:16,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 04:05:16,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:16,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 04:05:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-15 04:05:16,107 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 04:05:18,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:20,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:22,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:22,848 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2022-02-15 04:05:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 04:05:22,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-02-15 04:05:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:22,860 INFO L225 Difference]: With dead ends: 116 [2022-02-15 04:05:22,861 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 04:05:22,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-15 04:05:22,861 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 48 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:22,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 53 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 367 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-02-15 04:05:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 04:05:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2022-02-15 04:05:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 55 states have internal predecessors, (63), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-15 04:05:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-02-15 04:05:22,869 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 66 [2022-02-15 04:05:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:22,870 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-02-15 04:05:22,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 04:05:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-02-15 04:05:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 04:05:22,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:22,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:22,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 04:05:22,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 1 times [2022-02-15 04:05:22,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:22,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134069175] [2022-02-15 04:05:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:22,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:22,873 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:22,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 04:05:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:23,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:23,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134069175] [2022-02-15 04:05:23,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134069175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:23,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:23,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:05:23,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017104057] [2022-02-15 04:05:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:23,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:05:23,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:05:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:05:23,035 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:23,526 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2022-02-15 04:05:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:05:23,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-02-15 04:05:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:23,527 INFO L225 Difference]: With dead ends: 107 [2022-02-15 04:05:23,527 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 04:05:23,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-15 04:05:23,528 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 97 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:23,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 60 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:05:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 04:05:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-02-15 04:05:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 57 states have internal predecessors, (66), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-15 04:05:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-02-15 04:05:23,536 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 65 [2022-02-15 04:05:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:23,536 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-02-15 04:05:23,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:23,537 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-02-15 04:05:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 04:05:23,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:23,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 04:05:23,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 1 times [2022-02-15 04:05:23,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:23,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395224888] [2022-02-15 04:05:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:23,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:23,539 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:24,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 04:05:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-15 04:05:28,635 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:28,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395224888] [2022-02-15 04:05:28,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395224888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:28,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:28,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 04:05:28,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35855806] [2022-02-15 04:05:28,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:28,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 04:05:28,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:28,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 04:05:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:05:28,637 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-15 04:05:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:31,350 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2022-02-15 04:05:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 04:05:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 66 [2022-02-15 04:05:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:31,352 INFO L225 Difference]: With dead ends: 123 [2022-02-15 04:05:31,353 INFO L226 Difference]: Without dead ends: 121 [2022-02-15 04:05:31,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 04:05:31,354 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 202 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:31,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 62 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 04:05:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-15 04:05:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 93. [2022-02-15 04:05:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (18), 12 states have call predecessors, (18), 13 states have call successors, (18) [2022-02-15 04:05:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-02-15 04:05:31,371 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 66 [2022-02-15 04:05:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:31,372 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-02-15 04:05:31,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-15 04:05:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-02-15 04:05:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 04:05:31,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:31,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:31,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 04:05:31,373 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1470293173, now seen corresponding path program 2 times [2022-02-15 04:05:31,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:31,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897012979] [2022-02-15 04:05:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:31,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:31,376 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 04:05:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:31,496 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:31,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897012979] [2022-02-15 04:05:31,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897012979] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:31,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:31,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:05:31,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487818321] [2022-02-15 04:05:31,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:05:31,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:05:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:05:31,498 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:31,983 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2022-02-15 04:05:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 04:05:31,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-02-15 04:05:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:31,985 INFO L225 Difference]: With dead ends: 127 [2022-02-15 04:05:31,985 INFO L226 Difference]: Without dead ends: 107 [2022-02-15 04:05:31,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:05:31,986 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:31,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 63 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 04:05:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-15 04:05:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-02-15 04:05:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 78 states have internal predecessors, (91), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2022-02-15 04:05:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2022-02-15 04:05:32,004 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 67 [2022-02-15 04:05:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:32,004 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2022-02-15 04:05:32,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2022-02-15 04:05:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 04:05:32,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:32,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:32,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 04:05:32,006 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1247511922, now seen corresponding path program 3 times [2022-02-15 04:05:32,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:32,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881025985] [2022-02-15 04:05:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:32,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:32,008 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 04:05:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 04:05:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:32,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:32,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881025985] [2022-02-15 04:05:32,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [881025985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:32,149 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:32,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:05:32,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752085466] [2022-02-15 04:05:32,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:32,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:05:32,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:32,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:05:32,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:05:32,151 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:34,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:34,904 INFO L93 Difference]: Finished difference Result 169 states and 215 transitions. [2022-02-15 04:05:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 04:05:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2022-02-15 04:05:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:34,906 INFO L225 Difference]: With dead ends: 169 [2022-02-15 04:05:34,906 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 04:05:34,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-15 04:05:34,907 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 110 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:34,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 733 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 04:05:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 04:05:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2022-02-15 04:05:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.2625) internal successors, (101), 85 states have internal predecessors, (101), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-02-15 04:05:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2022-02-15 04:05:34,923 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 68 [2022-02-15 04:05:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:34,923 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2022-02-15 04:05:34,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2022-02-15 04:05:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 04:05:34,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:34,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:34,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 04:05:34,925 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:34,925 INFO L85 PathProgramCache]: Analyzing trace with hash -677053431, now seen corresponding path program 4 times [2022-02-15 04:05:34,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:34,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962281304] [2022-02-15 04:05:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:34,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:34,926 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:34,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:34,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:34,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:34,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:34,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:34,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 04:05:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:35,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 04:05:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:35,045 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:35,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962281304] [2022-02-15 04:05:35,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1962281304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:35,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:35,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:05:35,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171569108] [2022-02-15 04:05:35,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:35,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:05:35,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:05:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:05:35,047 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:37,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:37,739 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2022-02-15 04:05:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 04:05:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-02-15 04:05:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:37,740 INFO L225 Difference]: With dead ends: 175 [2022-02-15 04:05:37,740 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 04:05:37,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:05:37,741 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:37,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 63 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 675 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 04:05:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 04:05:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-02-15 04:05:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 93 states have internal predecessors, (113), 16 states have call successors, (16), 11 states have call predecessors, (16), 12 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-02-15 04:05:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2022-02-15 04:05:37,759 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 69 [2022-02-15 04:05:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:37,761 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2022-02-15 04:05:37,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-15 04:05:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2022-02-15 04:05:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 04:05:37,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:37,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:37,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 04:05:37,762 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:37,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1405616165, now seen corresponding path program 5 times [2022-02-15 04:05:37,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:37,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994219930] [2022-02-15 04:05:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:37,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:37,764 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 04:05:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:37,905 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:37,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994219930] [2022-02-15 04:05:37,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [994219930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:37,906 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:37,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:05:37,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454505412] [2022-02-15 04:05:37,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:37,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:05:37,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:05:37,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:05:37,907 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:39,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:40,555 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2022-02-15 04:05:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 04:05:40,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-02-15 04:05:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:40,557 INFO L225 Difference]: With dead ends: 143 [2022-02-15 04:05:40,557 INFO L226 Difference]: Without dead ends: 123 [2022-02-15 04:05:40,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:05:40,558 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:40,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 61 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 629 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 04:05:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-15 04:05:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2022-02-15 04:05:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 78 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-15 04:05:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2022-02-15 04:05:40,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 70 [2022-02-15 04:05:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:40,571 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2022-02-15 04:05:40,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2022-02-15 04:05:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 04:05:40,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:40,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 04:05:40,572 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 875388352, now seen corresponding path program 1 times [2022-02-15 04:05:40,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:40,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107616145] [2022-02-15 04:05:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:40,574 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 04:05:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 04:05:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:40,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:40,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107616145] [2022-02-15 04:05:40,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [107616145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:40,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:40,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 04:05:40,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315670970] [2022-02-15 04:05:40,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:40,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 04:05:40,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:40,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 04:05:40,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:05:40,626 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:05:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:40,769 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2022-02-15 04:05:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 04:05:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2022-02-15 04:05:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:40,773 INFO L225 Difference]: With dead ends: 162 [2022-02-15 04:05:40,773 INFO L226 Difference]: Without dead ends: 101 [2022-02-15 04:05:40,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 04:05:40,774 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:40,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:05:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-15 04:05:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-15 04:05:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-15 04:05:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-02-15 04:05:40,788 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 73 [2022-02-15 04:05:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-02-15 04:05:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-15 04:05:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-02-15 04:05:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 04:05:40,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:40,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:40,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 04:05:40,790 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash -495926943, now seen corresponding path program 1 times [2022-02-15 04:05:40,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:40,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296902931] [2022-02-15 04:05:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:40,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:40,792 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-15 04:05:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-02-15 04:05:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 04:05:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:40,988 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:40,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296902931] [2022-02-15 04:05:40,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [296902931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:40,988 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:40,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 04:05:40,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994621929] [2022-02-15 04:05:40,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:40,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 04:05:40,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 04:05:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-15 04:05:40,990 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 04:05:43,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:43,581 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-02-15 04:05:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 04:05:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 74 [2022-02-15 04:05:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:43,583 INFO L225 Difference]: With dead ends: 185 [2022-02-15 04:05:43,583 INFO L226 Difference]: Without dead ends: 123 [2022-02-15 04:05:43,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-15 04:05:43,586 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 80 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:43,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 65 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 04:05:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-15 04:05:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-02-15 04:05:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.206896551724138) internal successors, (105), 90 states have internal predecessors, (105), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2022-02-15 04:05:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2022-02-15 04:05:43,607 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 74 [2022-02-15 04:05:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:43,607 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2022-02-15 04:05:43,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-15 04:05:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2022-02-15 04:05:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 04:05:43,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:43,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:43,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 04:05:43,608 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1541127366, now seen corresponding path program 6 times [2022-02-15 04:05:43,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:43,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361407210] [2022-02-15 04:05:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:43,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:05:43,610 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:05:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:05:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-15 04:05:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-15 04:05:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-15 04:05:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-15 04:05:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 04:05:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-15 04:05:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 04:05:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:05:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-15 04:05:43,785 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:05:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361407210] [2022-02-15 04:05:43,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [361407210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:05:43,785 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:05:43,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 04:05:43,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858303990] [2022-02-15 04:05:43,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:05:43,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 04:05:43,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:05:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 04:05:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-15 04:05:43,786 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:45,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-15 04:05:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:05:46,510 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2022-02-15 04:05:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 04:05:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2022-02-15 04:05:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:05:46,512 INFO L225 Difference]: With dead ends: 180 [2022-02-15 04:05:46,512 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 04:05:46,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-15 04:05:46,512 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 87 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 04:05:46,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 64 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 682 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 04:05:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 04:05:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 132. [2022-02-15 04:05:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 104 states have internal predecessors, (122), 19 states have call successors, (19), 11 states have call predecessors, (19), 13 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2022-02-15 04:05:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2022-02-15 04:05:46,532 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 73 [2022-02-15 04:05:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:05:46,532 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2022-02-15 04:05:46,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-15 04:05:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2022-02-15 04:05:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 04:05:46,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:05:46,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:05:46,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 04:05:46,533 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:05:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:05:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1213658525, now seen corresponding path program 1 times [2022-02-15 04:05:46,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:05:46,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098023590] [2022-02-15 04:05:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:05:55,116 WARN L228 SmtUtils]: Spent 8.58s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 04:06:14,399 WARN L228 SmtUtils]: Spent 10.71s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 269] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-02-15 04:06:14,410 ERROR L257 FreeRefinementEngine]: Caught unknown exception: Undeclared function symbol (mod Real Int) [2022-02-15 04:06:14,411 WARN L325 FreeRefinementEngine]: Global settings require throwing the following exception [2022-02-15 04:06:14,411 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (mod Real Int) at de.uni_freiburg.informatik.ultimate.logic.Theory.term(Theory.java:1615) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:401) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.mod(SmtUtils.java:1840) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1450) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1374) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1363) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.convertApplicationTerm(Substitution.java:53) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.apply(Substitution.java:59) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.getUpdates(QvasrAbstractor.java:1229) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.computeAbstraction(QvasrAbstractor.java:106) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:127) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:91) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.accelerateNestedLoops(AcceleratedInterpolationCore.java:484) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:220) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:185) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:216) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-02-15 04:06:14,416 INFO L158 Benchmark]: Toolchain (without parser) took 76089.45ms. Allocated memory was 186.6MB in the beginning and 267.4MB in the end (delta: 80.7MB). Free memory was 134.5MB in the beginning and 191.8MB in the end (delta: -57.3MB). Peak memory consumption was 24.9MB. Max. memory is 8.0GB. [2022-02-15 04:06:14,416 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 186.6MB. Free memory was 150.9MB in the beginning and 150.7MB in the end (delta: 122.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 04:06:14,416 INFO L158 Benchmark]: CACSL2BoogieTranslator took 288.44ms. Allocated memory was 186.6MB in the beginning and 267.4MB in the end (delta: 80.7MB). Free memory was 134.3MB in the beginning and 240.1MB in the end (delta: -105.7MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. [2022-02-15 04:06:14,416 INFO L158 Benchmark]: Boogie Preprocessor took 40.15ms. Allocated memory is still 267.4MB. Free memory was 240.1MB in the beginning and 238.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 04:06:14,417 INFO L158 Benchmark]: RCFGBuilder took 381.87ms. Allocated memory is still 267.4MB. Free memory was 238.2MB in the beginning and 223.0MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-02-15 04:06:14,417 INFO L158 Benchmark]: TraceAbstraction took 75375.13ms. Allocated memory is still 267.4MB. Free memory was 222.5MB in the beginning and 191.8MB in the end (delta: 30.7MB). Peak memory consumption was 30.7MB. Max. memory is 8.0GB. [2022-02-15 04:06:14,421 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 186.6MB. Free memory was 150.9MB in the beginning and 150.7MB in the end (delta: 122.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 288.44ms. Allocated memory was 186.6MB in the beginning and 267.4MB in the end (delta: 80.7MB). Free memory was 134.3MB in the beginning and 240.1MB in the end (delta: -105.7MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.15ms. Allocated memory is still 267.4MB. Free memory was 240.1MB in the beginning and 238.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 381.87ms. Allocated memory is still 267.4MB. Free memory was 238.2MB in the beginning and 223.0MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 75375.13ms. Allocated memory is still 267.4MB. Free memory was 222.5MB in the beginning and 191.8MB in the end (delta: 30.7MB). Peak memory consumption was 30.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Undeclared function symbol (mod Real Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Undeclared function symbol (mod Real Int): de.uni_freiburg.informatik.ultimate.logic.Theory.term(Theory.java:1615) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-15 04:06:14,443 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...