/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/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 14:40:49,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:40:49,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:40:49,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 14:40:49,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 14:40:49,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 14:40:49,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 14:40:49,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 14:40:49,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 14:40:49,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 14:40:49,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 14:40:49,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 14:40:49,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 14:40:49,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 14:40:49,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 14:40:49,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 14:40:49,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 14:40:49,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 14:40:49,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 14:40:49,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 14:40:49,336 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 14:40:49,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 14:40:49,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 14:40:49,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 14:40:49,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 14:40:49,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 14:40:49,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 14:40:49,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 14:40:49,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 14:40:49,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 14:40:49,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 14:40:49,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 14:40:49,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 14:40:49,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 14:40:49,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 14:40:49,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 14:40:49,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 14:40:49,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 14:40:49,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 14:40:49,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 14:40:49,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 14:40:49,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 14:40:49,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:40:49,353 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:40:49,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:40:49,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:40:49,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:40:49,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:40:49,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:40:49,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:40:49,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:40:49,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:40:49,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:40:49,357 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:40:49,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:40:49,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:40:49,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:40:49,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:40:49,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:40:49,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:40:49,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:40:49,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:40:49,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:40:49,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:40:49,359 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:40:49,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:40:49,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:40:49,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:40:49,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:40:49,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:40:49,562 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:40:49,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2022-03-17 14:40:49,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4366fa8a7/8035d3288b5d4b2094b4d2c1b054c3e5/FLAGd12f8cf86 [2022-03-17 14:40:49,910 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:40:49,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2022-03-17 14:40:49,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4366fa8a7/8035d3288b5d4b2094b4d2c1b054c3e5/FLAGd12f8cf86 [2022-03-17 14:40:50,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4366fa8a7/8035d3288b5d4b2094b4d2c1b054c3e5 [2022-03-17 14:40:50,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:40:50,342 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:40:50,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:40:50,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:40:50,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:40:50,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b66c6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50, skipping insertion in model container [2022-03-17 14:40:50,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:40:50,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:40:50,506 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/sum01-1.i[808,821] [2022-03-17 14:40:50,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:40:50,520 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:40:50,527 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/sum01-1.i[808,821] [2022-03-17 14:40:50,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:40:50,537 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:40:50,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50 WrapperNode [2022-03-17 14:40:50,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:40:50,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:40:50,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:40:50,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:40:50,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:40:50,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:40:50,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:40:50,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:40:50,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:40:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:50,590 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) [2022-03-17 14:40:50,599 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 [2022-03-17 14:40:50,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:40:50,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:40:50,617 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:40:50,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 14:40:50,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:40:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:40:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:40:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:40:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:40:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:40:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:40:50,667 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:40:50,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:40:50,771 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:40:50,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:40:50,776 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 14:40:50,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:50 BoogieIcfgContainer [2022-03-17 14:40:50,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:40:50,778 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:40:50,778 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:40:50,779 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:40:50,781 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:50" (1/1) ... [2022-03-17 14:40:50,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:40:50 BasicIcfg [2022-03-17 14:40:50,796 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:40:50,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:40:50,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:40:50,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:40:50,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:40:50" (1/4) ... [2022-03-17 14:40:50,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39137c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:40:50, skipping insertion in model container [2022-03-17 14:40:50,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:50" (2/4) ... [2022-03-17 14:40:50,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39137c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:40:50, skipping insertion in model container [2022-03-17 14:40:50,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:50" (3/4) ... [2022-03-17 14:40:50,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39137c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:40:50, skipping insertion in model container [2022-03-17 14:40:50,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:40:50" (4/4) ... [2022-03-17 14:40:50,808 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.iJordan [2022-03-17 14:40:50,812 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:40:50,812 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:40:50,861 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:40:50,866 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 [2022-03-17 14:40:50,866 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:40:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 14:40:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 14:40:50,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:50,880 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:50,881 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash -423489079, now seen corresponding path program 1 times [2022-03-17 14:40:50,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:50,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208554724] [2022-03-17 14:40:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:50,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:51,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:51,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:51,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208554724] [2022-03-17 14:40:51,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208554724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:40:51,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:40:51,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 14:40:51,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198892295] [2022-03-17 14:40:51,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:40:51,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 14:40:51,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 14:40:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 14:40:51,069 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:51,106 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-17 14:40:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 14:40:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 14:40:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:51,114 INFO L225 Difference]: With dead ends: 20 [2022-03-17 14:40:51,115 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 14:40:51,116 INFO L911 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 [2022-03-17 14:40:51,119 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:51,120 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:40:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 14:40:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 14:40:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 14:40:51,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 14:40:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:51,143 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 14:40:51,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 14:40:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 14:40:51,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:51,145 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:51,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:40:51,146 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash -422565558, now seen corresponding path program 1 times [2022-03-17 14:40:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:51,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112999878] [2022-03-17 14:40:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:51,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:51,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:51,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112999878] [2022-03-17 14:40:51,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112999878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:40:51,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:40:51,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 14:40:51,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682776927] [2022-03-17 14:40:51,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:40:51,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 14:40:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 14:40:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 14:40:51,242 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:51,315 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-17 14:40:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 14:40:51,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 14:40:51,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:51,316 INFO L225 Difference]: With dead ends: 20 [2022-03-17 14:40:51,316 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 14:40:51,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-17 14:40:51,322 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:51,322 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:40:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 14:40:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-17 14:40:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-17 14:40:51,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-17 14:40:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:51,331 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-17 14:40:51,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:51,332 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-17 14:40:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 14:40:51,334 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:51,338 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:51,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 14:40:51,339 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1744981802, now seen corresponding path program 1 times [2022-03-17 14:40:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:51,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866696803] [2022-03-17 14:40:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:51,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866696803] [2022-03-17 14:40:51,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866696803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:51,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275312020] [2022-03-17 14:40:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:51,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:51,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:51,558 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) [2022-03-17 14:40:51,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:40:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 14:40:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:51,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:51,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275312020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:51,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:51,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-17 14:40:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983206136] [2022-03-17 14:40:51,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:51,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 14:40:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 14:40:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-17 14:40:52,000 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:52,289 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-03-17 14:40:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 14:40:52,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-17 14:40:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:52,290 INFO L225 Difference]: With dead ends: 26 [2022-03-17 14:40:52,290 INFO L226 Difference]: Without dead ends: 22 [2022-03-17 14:40:52,291 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-03-17 14:40:52,291 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:52,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-17 14:40:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-17 14:40:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-17 14:40:52,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-17 14:40:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:52,294 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-17 14:40:52,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-17 14:40:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 14:40:52,295 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:52,295 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:52,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:52,507 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 [2022-03-17 14:40:52,508 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1411179434, now seen corresponding path program 2 times [2022-03-17 14:40:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271437950] [2022-03-17 14:40:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:52,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:40:52,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:52,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271437950] [2022-03-17 14:40:52,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271437950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:52,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845453864] [2022-03-17 14:40:52,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:40:52,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:52,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:52,697 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) [2022-03-17 14:40:52,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:40:52,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:40:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 14:40:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:52,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:53,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845453864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:53,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:53,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-17 14:40:53,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147433657] [2022-03-17 14:40:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:53,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 14:40:53,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 14:40:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-03-17 14:40:53,269 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:53,744 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-17 14:40:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 14:40:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-17 14:40:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:53,745 INFO L225 Difference]: With dead ends: 34 [2022-03-17 14:40:53,745 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 14:40:53,746 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 14:40:53,747 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:53,747 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 81 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 14:40:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-03-17 14:40:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-17 14:40:53,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-03-17 14:40:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:53,750 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-17 14:40:53,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-17 14:40:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 14:40:53,751 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:53,751 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:53,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:53,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 14:40:53,968 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1657807639, now seen corresponding path program 1 times [2022-03-17 14:40:53,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:53,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013757599] [2022-03-17 14:40:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:54,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013757599] [2022-03-17 14:40:54,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013757599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570026592] [2022-03-17 14:40:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:54,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:54,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 14:40:54,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 14:40:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 14:40:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:54,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:54,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570026592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:54,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:54,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-03-17 14:40:54,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397744282] [2022-03-17 14:40:54,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:54,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 14:40:54,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:54,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 14:40:54,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-17 14:40:54,220 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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) [2022-03-17 14:40:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:54,313 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-03-17 14:40:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 14:40:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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 26 [2022-03-17 14:40:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:54,314 INFO L225 Difference]: With dead ends: 44 [2022-03-17 14:40:54,314 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 14:40:54,314 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2022-03-17 14:40:54,315 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:54,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:40:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 14:40:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-17 14:40:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:40:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-03-17 14:40:54,336 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 26 [2022-03-17 14:40:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:54,336 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-03-17 14:40:54,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 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) [2022-03-17 14:40:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-03-17 14:40:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 14:40:54,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:54,337 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:54,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:54,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:54,542 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:54,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2063074549, now seen corresponding path program 2 times [2022-03-17 14:40:54,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:54,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777323921] [2022-03-17 14:40:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:54,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 14:40:54,587 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 14:40:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 14:40:54,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 14:40:54,635 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 14:40:54,636 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 14:40:54,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-17 14:40:54,639 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-03-17 14:40:54,641 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 14:40:54,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:40:54 BasicIcfg [2022-03-17 14:40:54,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 14:40:54,675 INFO L158 Benchmark]: Toolchain (without parser) took 4332.72ms. Allocated memory was 198.2MB in the beginning and 257.9MB in the end (delta: 59.8MB). Free memory was 144.0MB in the beginning and 221.5MB in the end (delta: -77.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:40:54,675 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 160.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:40:54,675 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.61ms. Allocated memory is still 198.2MB. Free memory was 143.8MB in the beginning and 170.2MB in the end (delta: -26.5MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-03-17 14:40:54,675 INFO L158 Benchmark]: Boogie Preprocessor took 20.29ms. Allocated memory is still 198.2MB. Free memory was 170.2MB in the beginning and 168.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 14:40:54,675 INFO L158 Benchmark]: RCFGBuilder took 218.42ms. Allocated memory is still 198.2MB. Free memory was 168.7MB in the beginning and 158.3MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 14:40:54,676 INFO L158 Benchmark]: IcfgTransformer took 18.24ms. Allocated memory is still 198.2MB. Free memory was 158.3MB in the beginning and 157.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 14:40:54,676 INFO L158 Benchmark]: TraceAbstraction took 3870.72ms. Allocated memory was 198.2MB in the beginning and 257.9MB in the end (delta: 59.8MB). Free memory was 156.7MB in the beginning and 221.5MB in the end (delta: -64.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:40:54,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 160.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.61ms. Allocated memory is still 198.2MB. Free memory was 143.8MB in the beginning and 170.2MB in the end (delta: -26.5MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.29ms. Allocated memory is still 198.2MB. Free memory was 170.2MB in the beginning and 168.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 218.42ms. Allocated memory is still 198.2MB. Free memory was 168.7MB in the beginning and 158.3MB in the end (delta: 10.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 18.24ms. Allocated memory is still 198.2MB. Free memory was 158.3MB in the beginning and 157.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3870.72ms. Allocated memory was 198.2MB in the beginning and 257.9MB in the end (delta: 59.8MB). Free memory was 156.7MB in the beginning and 221.5MB in the end (delta: -64.8MB). There was no memory consumed. 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 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=10, n=0] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=2, n=10] [L24] i++ VAL [i=2, n=10, n=2] [L24] COND TRUE i<=n VAL [i=2, n=10, n=2] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=10, n=4] [L24] i++ VAL [i=3, n=4, n=10] [L24] COND TRUE i<=n VAL [i=3, n=10, n=4] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=6, n=10] [L24] i++ VAL [i=4, n=10, n=6] [L24] COND TRUE i<=n VAL [i=4, n=6, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=10, n=8] [L24] i++ VAL [i=5, n=8, n=10] [L24] COND TRUE i<=n VAL [i=5, n=10, n=8] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=10, n=12] [L24] i++ VAL [i=7, n=12, n=10] [L24] COND TRUE i<=n VAL [i=7, n=10, n=12] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=14, n=10] [L24] i++ VAL [i=8, n=14, n=10] [L24] COND TRUE i<=n VAL [i=8, n=10, n=14] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=16, n=10] [L24] i++ VAL [i=9, n=16, n=10] [L24] COND TRUE i<=n VAL [i=9, n=10, n=16] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=10, n=18] [L24] i++ VAL [i=10, n=10, n=18] [L24] COND TRUE i<=n VAL [i=10, n=18, n=10] [L25] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L24] i++ VAL [i=11, n=10, n=18] [L24] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 133 mSDsluCounter, 228 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 166 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 523 IncrementalHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 62 mSDtfsCounter, 523 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 205 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, InterpolantAutomatonStates: 57, 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, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 191 ConstructedInterpolants, 0 QuantifiedInterpolants, 1066 SizeOfPredicates, 6 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 28/144 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 proved your program to be incorrect! [2022-03-17 14:40:54,699 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...