/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:18:52,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:18:52,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:18:52,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 03:18:52,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 03:18:52,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 03:18:52,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 03:18:52,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 03:18:52,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 03:18:52,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 03:18:52,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 03:18:52,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 03:18:52,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:18:52,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:18:52,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:18:52,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:18:52,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:18:52,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:18:52,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:18:52,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:18:52,512 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:18:52,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:18:52,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:18:52,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:18:52,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:18:52,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 03:18:52,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:18:52,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:18:52,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:18:52,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:18:52,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:18:52,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:18:52,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:18:52,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:18:52,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:18:52,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:18:52,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:18:52,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:18:52,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:18:52,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:18:52,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:18:52,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:18:52,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:18:52,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:18:52,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:18:52,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:18:52,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:18:52,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:18:52,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:18:52,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:18:52,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:18:52,544 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:18:52,544 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:18:52,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:18:52,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:18:52,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:18:52,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:18:52,763 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:18:52,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2022-03-20 03:18:52,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc19a2d4/72fe326bccb2472589b3cb5a5223fa1a/FLAG8d2dd1a2c [2022-03-20 03:18:53,197 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:18:53,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2022-03-20 03:18:53,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc19a2d4/72fe326bccb2472589b3cb5a5223fa1a/FLAG8d2dd1a2c [2022-03-20 03:18:53,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc19a2d4/72fe326bccb2472589b3cb5a5223fa1a [2022-03-20 03:18:53,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:18:53,216 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:18:53,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:18:53,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:18:53,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:18:53,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383ea672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53, skipping insertion in model container [2022-03-20 03:18:53,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:18:53,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:18:53,342 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c[318,331] [2022-03-20 03:18:53,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:18:53,383 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:18:53,390 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c[318,331] [2022-03-20 03:18:53,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:18:53,414 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:18:53,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53 WrapperNode [2022-03-20 03:18:53,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:18:53,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:18:53,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:18:53,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:18:53,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:18:53,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:18:53,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:18:53,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:18:53,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:18:53,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:53,480 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) [2022-03-20 03:18:53,481 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 [2022-03-20 03:18:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:18:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:18:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:18:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:18:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2022-03-20 03:18:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:18:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2022-03-20 03:18:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:18:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:18:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:18:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:18:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:18:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2022-03-20 03:18:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2022-03-20 03:18:53,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:18:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-03-20 03:18:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-03-20 03:18:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 03:18:53,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:18:53,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:18:53,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:18:53,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:18:53,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:18:53,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:18:53,594 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:18:53,596 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:18:53,795 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:18:53,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:18:53,799 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-03-20 03:18:53,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:53 BoogieIcfgContainer [2022-03-20 03:18:53,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:18:53,801 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:18:53,801 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:18:53,802 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:18:53,804 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:53" (1/1) ... [2022-03-20 03:18:53,805 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:18:53,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:18:53 BasicIcfg [2022-03-20 03:18:53,821 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:18:53,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:18:53,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:18:53,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:18:53,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:18:53" (1/4) ... [2022-03-20 03:18:53,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a7145f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:53, skipping insertion in model container [2022-03-20 03:18:53,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:53" (2/4) ... [2022-03-20 03:18:53,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a7145f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:53, skipping insertion in model container [2022-03-20 03:18:53,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:53" (3/4) ... [2022-03-20 03:18:53,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a7145f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:18:53, skipping insertion in model container [2022-03-20 03:18:53,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:18:53" (4/4) ... [2022-03-20 03:18:53,832 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.cJordan [2022-03-20 03:18:53,836 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:18:53,836 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:18:53,865 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:18:53,869 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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 [2022-03-20 03:18:53,869 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:18:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 03:18:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 03:18:53,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:53,883 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:53,884 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash -708032411, now seen corresponding path program 1 times [2022-03-20 03:18:53,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:53,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964822227] [2022-03-20 03:18:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:53,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:54,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:54,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:54,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964822227] [2022-03-20 03:18:54,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964822227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:54,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:54,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:18:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900002872] [2022-03-20 03:18:54,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:54,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:18:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:18:54,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:18:54,061 INFO L87 Difference]: Start difference. First operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:54,201 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-03-20 03:18:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:18:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 03:18:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:54,210 INFO L225 Difference]: With dead ends: 89 [2022-03-20 03:18:54,210 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 03:18:54,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:18:54,214 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 38 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:54,215 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 73 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:18:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 03:18:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-03-20 03:18:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-20 03:18:54,239 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-03-20 03:18:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:54,239 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-20 03:18:54,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-20 03:18:54,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 03:18:54,239 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:54,240 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:54,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:18:54,240 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash -707108890, now seen corresponding path program 1 times [2022-03-20 03:18:54,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:54,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875694242] [2022-03-20 03:18:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:54,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:54,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:54,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:54,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875694242] [2022-03-20 03:18:54,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875694242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:54,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:54,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 03:18:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80568604] [2022-03-20 03:18:54,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:54,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 03:18:54,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 03:18:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:18:54,349 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:54,421 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-03-20 03:18:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:18:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 03:18:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:54,422 INFO L225 Difference]: With dead ends: 26 [2022-03-20 03:18:54,423 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 03:18:54,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 03:18:54,424 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:54,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:18:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 03:18:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-03-20 03:18:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-20 03:18:54,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2022-03-20 03:18:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:54,437 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-20 03:18:54,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-20 03:18:54,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 03:18:54,438 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:54,438 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:54,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:18:54,438 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:54,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:54,438 INFO L85 PathProgramCache]: Analyzing trace with hash -740655430, now seen corresponding path program 1 times [2022-03-20 03:18:54,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:54,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439895692] [2022-03-20 03:18:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:54,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:54,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:54,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439895692] [2022-03-20 03:18:54,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439895692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794439634] [2022-03-20 03:18:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:54,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:54,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:54,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:18:54,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:18:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:54,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 03:18:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:54,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:54,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794439634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:54,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:54,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-20 03:18:54,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155090426] [2022-03-20 03:18:54,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:54,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 03:18:54,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 03:18:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-20 03:18:54,833 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:54,948 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 03:18:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:18:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 03:18:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:54,950 INFO L225 Difference]: With dead ends: 35 [2022-03-20 03:18:54,950 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 03:18:54,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-20 03:18:54,953 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:54,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 53 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:18:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 03:18:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-20 03:18:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-03-20 03:18:54,963 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2022-03-20 03:18:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:54,964 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-03-20 03:18:54,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-03-20 03:18:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 03:18:54,965 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:54,965 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:54,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:55,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:55,188 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash 758751030, now seen corresponding path program 2 times [2022-03-20 03:18:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:55,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333586061] [2022-03-20 03:18:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:55,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 03:18:55,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:55,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333586061] [2022-03-20 03:18:55,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333586061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:55,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:55,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 03:18:55,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040623279] [2022-03-20 03:18:55,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:55,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 03:18:55,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 03:18:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:18:55,293 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:55,344 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-03-20 03:18:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 03:18:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 03:18:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:55,347 INFO L225 Difference]: With dead ends: 60 [2022-03-20 03:18:55,347 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 03:18:55,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:18:55,349 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:55,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:18:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 03:18:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2022-03-20 03:18:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-03-20 03:18:55,358 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 28 [2022-03-20 03:18:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:55,358 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-03-20 03:18:55,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-03-20 03:18:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 03:18:55,359 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:55,359 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:55,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 03:18:55,359 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2120109907, now seen corresponding path program 1 times [2022-03-20 03:18:55,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:55,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948635811] [2022-03-20 03:18:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:55,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:55,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:55,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948635811] [2022-03-20 03:18:55,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948635811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:55,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610588428] [2022-03-20 03:18:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:55,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:55,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:55,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:18:55,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:18:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 03:18:55,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:55,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:55,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610588428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:55,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:55,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-03-20 03:18:55,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505231340] [2022-03-20 03:18:55,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:55,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 03:18:55,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 03:18:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:18:55,816 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:55,921 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-03-20 03:18:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 03:18:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 03:18:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:55,922 INFO L225 Difference]: With dead ends: 66 [2022-03-20 03:18:55,922 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 03:18:55,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2022-03-20 03:18:55,923 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:55,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 50 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:18:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 03:18:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 03:18:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-03-20 03:18:55,927 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 28 [2022-03-20 03:18:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:55,927 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-03-20 03:18:55,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-03-20 03:18:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 03:18:55,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:55,928 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:55,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:56,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:56,143 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1847728185, now seen corresponding path program 2 times [2022-03-20 03:18:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:56,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091736663] [2022-03-20 03:18:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 03:18:56,166 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 03:18:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 03:18:56,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 03:18:56,198 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 03:18:56,199 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 03:18:56,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 03:18:56,202 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-03-20 03:18:56,204 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 03:18:56,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:18:56 BasicIcfg [2022-03-20 03:18:56,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 03:18:56,228 INFO L158 Benchmark]: Toolchain (without parser) took 3011.90ms. Allocated memory was 199.2MB in the beginning and 243.3MB in the end (delta: 44.0MB). Free memory was 150.7MB in the beginning and 131.4MB in the end (delta: 19.2MB). Peak memory consumption was 64.3MB. Max. memory is 8.0GB. [2022-03-20 03:18:56,228 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 199.2MB. Free memory is still 167.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 03:18:56,228 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.86ms. Allocated memory is still 199.2MB. Free memory was 150.4MB in the beginning and 173.9MB in the end (delta: -23.4MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. [2022-03-20 03:18:56,229 INFO L158 Benchmark]: Boogie Preprocessor took 38.13ms. Allocated memory is still 199.2MB. Free memory was 173.9MB in the beginning and 171.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 03:18:56,229 INFO L158 Benchmark]: RCFGBuilder took 346.76ms. Allocated memory is still 199.2MB. Free memory was 171.8MB in the beginning and 155.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-03-20 03:18:56,229 INFO L158 Benchmark]: IcfgTransformer took 19.85ms. Allocated memory is still 199.2MB. Free memory was 155.4MB in the beginning and 153.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 03:18:56,229 INFO L158 Benchmark]: TraceAbstraction took 2401.53ms. Allocated memory was 199.2MB in the beginning and 243.3MB in the end (delta: 44.0MB). Free memory was 152.8MB in the beginning and 131.4MB in the end (delta: 21.4MB). Peak memory consumption was 66.9MB. Max. memory is 8.0GB. [2022-03-20 03:18:56,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 199.2MB. Free memory is still 167.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.86ms. Allocated memory is still 199.2MB. Free memory was 150.4MB in the beginning and 173.9MB in the end (delta: -23.4MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.13ms. Allocated memory is still 199.2MB. Free memory was 173.9MB in the beginning and 171.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 346.76ms. Allocated memory is still 199.2MB. Free memory was 171.8MB in the beginning and 155.4MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * IcfgTransformer took 19.85ms. Allocated memory is still 199.2MB. Free memory was 155.4MB in the beginning and 153.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 2401.53ms. Allocated memory was 199.2MB in the beginning and 243.3MB in the end (delta: 44.0MB). Free memory was 152.8MB in the beginning and 131.4MB in the end (delta: 21.4MB). Peak memory consumption was 66.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [\old(a)=20020, \old(a)=20006, \old(b)=20013, \old(b)=20003, \old(x)=20017, \old(x)=20011, a={4:0}, b={5:0}, x={6:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, n=5, nmax=50, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={6:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L96] COND FALSE !(j <= n) VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L102] CALL __VERIFIER_assert(i==2) VAL [\old(cond)=0, a={4:0}, b={5:0}, x={6:0}] [L6] COND TRUE !(cond) VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] [L7] reach_error() VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 196 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 233 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 100 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 323 IncrementalHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 133 mSDtfsCounter, 323 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 25 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 742 SizeOfPredicates, 4 NumberOfNonLiveVariables, 327 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 28/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-03-20 03:18:56,258 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...