/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/array-tiling/mbpr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:50:03,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:50:03,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:50:03,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:50:03,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:50:03,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:50:03,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:50:03,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:50:03,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:50:03,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:50:03,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:50:03,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:50:03,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:50:03,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:50:03,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:50:03,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:50:03,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:50:03,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:50:03,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:50:03,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:50:03,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:50:03,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:50:03,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:50:03,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:50:03,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 08:50:03,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 08:50:03,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 08:50:03,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 08:50:03,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 08:50:03,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 08:50:03,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:50:03,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:50:03,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:50:03,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:50:03,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:50:03,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:50:03,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:50:03,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:50:03,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:50:03,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:50:03,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:50:03,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:50:03,556 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:50:03,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:50:03,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:50:03,558 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:50:03,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:50:03,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:50:03,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:50:03,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:50:03,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:50:03,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:50:03,559 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:50:03,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:50:03,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:50:03,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:50:03,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:50:03,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:50:03,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:50:03,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:50:03,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:50:03,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:50:03,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:50:03,561 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:50:03,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:50:03,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:50:03,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:50:03,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:50:03,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:50:03,785 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:50:03,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr5.c [2022-01-31 08:50:03,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74b08ab7/9fbf30f1855e450f9e365046b85dfed6/FLAGcd1594dbe [2022-01-31 08:50:04,172 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:50:04,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr5.c [2022-01-31 08:50:04,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74b08ab7/9fbf30f1855e450f9e365046b85dfed6/FLAGcd1594dbe [2022-01-31 08:50:04,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74b08ab7/9fbf30f1855e450f9e365046b85dfed6 [2022-01-31 08:50:04,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:50:04,582 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:50:04,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:50:04,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:50:04,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:50:04,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a8b5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04, skipping insertion in model container [2022-01-31 08:50:04,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:50:04,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:50:04,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr5.c[396,409] [2022-01-31 08:50:04,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:50:04,798 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:50:04,807 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr5.c[396,409] [2022-01-31 08:50:04,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:50:04,838 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:50:04,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04 WrapperNode [2022-01-31 08:50:04,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:50:04,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:50:04,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:50:04,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:50:04,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:50:04,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:50:04,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:50:04,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:50:04,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (1/1) ... [2022-01-31 08:50:04,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:50:04,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:04,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:50:04,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:50:04,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:50:04,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:50:04,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:50:04,942 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 08:50:04,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:50:04,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:50:04,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:50:04,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:50:04,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:50:04,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:50:04,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:50:04,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:50:04,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:50:05,002 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:50:05,004 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:50:05,330 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:50:05,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:50:05,336 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 08:50:05,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:50:05 BoogieIcfgContainer [2022-01-31 08:50:05,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:50:05,338 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:50:05,338 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:50:05,350 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:50:05,353 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:50:05" (1/1) ... [2022-01-31 08:50:05,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:50:05 BasicIcfg [2022-01-31 08:50:05,388 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:50:05,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:50:05,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:50:05,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:50:05,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:50:04" (1/4) ... [2022-01-31 08:50:05,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2634460c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:50:05, skipping insertion in model container [2022-01-31 08:50:05,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:50:04" (2/4) ... [2022-01-31 08:50:05,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2634460c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:50:05, skipping insertion in model container [2022-01-31 08:50:05,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:50:05" (3/4) ... [2022-01-31 08:50:05,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2634460c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:50:05, skipping insertion in model container [2022-01-31 08:50:05,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:50:05" (4/4) ... [2022-01-31 08:50:05,397 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr5.cJordan [2022-01-31 08:50:05,404 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:50:05,404 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:50:05,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:50:05,456 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:50:05,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:50:05,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 47 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:50:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 08:50:05,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:05,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:05,488 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:05,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1370531921, now seen corresponding path program 1 times [2022-01-31 08:50:05,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:05,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810711786] [2022-01-31 08:50:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:05,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:05,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:05,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:50:05,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:05,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810711786] [2022-01-31 08:50:05,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810711786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:50:05,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:50:05,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:50:05,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562270734] [2022-01-31 08:50:05,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:50:05,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:50:05,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:50:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:50:05,760 INFO L87 Difference]: Start difference. First operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 47 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:50:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:05,843 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-01-31 08:50:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:50:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 08:50:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:05,852 INFO L225 Difference]: With dead ends: 56 [2022-01-31 08:50:05,852 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 08:50:05,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:50:05,856 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:05,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:50:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 08:50:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 08:50:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:50:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2022-01-31 08:50:05,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 30 [2022-01-31 08:50:05,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:05,885 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2022-01-31 08:50:05,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:50:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2022-01-31 08:50:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 08:50:05,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:05,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:05,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:50:05,888 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:05,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2131528620, now seen corresponding path program 1 times [2022-01-31 08:50:05,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:05,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943226041] [2022-01-31 08:50:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:05,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:50:06,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:06,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943226041] [2022-01-31 08:50:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943226041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:50:06,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:50:06,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:50:06,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528345609] [2022-01-31 08:50:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:50:06,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:50:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:50:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:50:06,031 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:50:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:06,176 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-01-31 08:50:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:50:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 08:50:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:06,181 INFO L225 Difference]: With dead ends: 56 [2022-01-31 08:50:06,181 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 08:50:06,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:50:06,188 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 17 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:06,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 206 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:50:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 08:50:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-31 08:50:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:50:06,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-31 08:50:06,207 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2022-01-31 08:50:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:06,209 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-31 08:50:06,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:50:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-31 08:50:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 08:50:06,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:06,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:06,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:50:06,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2132452141, now seen corresponding path program 1 times [2022-01-31 08:50:06,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:06,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792284372] [2022-01-31 08:50:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:06,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:50:06,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792284372] [2022-01-31 08:50:06,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792284372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:50:06,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:50:06,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:50:06,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023099832] [2022-01-31 08:50:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:50:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:50:06,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:50:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:50:06,417 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:50:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:06,577 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-01-31 08:50:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:50:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-31 08:50:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:06,581 INFO L225 Difference]: With dead ends: 75 [2022-01-31 08:50:06,581 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 08:50:06,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:50:06,588 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:06,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 35 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:50:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 08:50:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-01-31 08:50:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:50:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-01-31 08:50:06,600 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2022-01-31 08:50:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:06,600 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-01-31 08:50:06,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:50:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-01-31 08:50:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 08:50:06,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:06,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:06,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:50:06,602 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 462795345, now seen corresponding path program 1 times [2022-01-31 08:50:06,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:06,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802576059] [2022-01-31 08:50:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:06,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:50:06,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802576059] [2022-01-31 08:50:06,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802576059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:50:06,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:50:06,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:50:06,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105327664] [2022-01-31 08:50:06,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:50:06,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:50:06,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:50:06,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:50:06,762 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:50:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:06,833 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-01-31 08:50:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:50:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-01-31 08:50:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:06,836 INFO L225 Difference]: With dead ends: 60 [2022-01-31 08:50:06,837 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 08:50:06,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:50:06,842 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:06,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:50:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 08:50:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 08:50:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.22) internal successors, (61), 51 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:50:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-01-31 08:50:06,854 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 50 [2022-01-31 08:50:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:06,854 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-01-31 08:50:06,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:50:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-01-31 08:50:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 08:50:06,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:06,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:06,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:50:06,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1334156014, now seen corresponding path program 1 times [2022-01-31 08:50:06,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:06,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210319897] [2022-01-31 08:50:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:06,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:07,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:07,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:50:07,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210319897] [2022-01-31 08:50:07,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210319897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:07,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402394948] [2022-01-31 08:50:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:07,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:07,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:07,495 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) [2022-01-31 08:50:07,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:50:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 111 conjunts are in the unsatisfiable core [2022-01-31 08:50:07,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:07,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:07,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-01-31 08:50:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:07,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:08,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 40 [2022-01-31 08:50:08,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-01-31 08:50:08,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:08,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 40 [2022-01-31 08:50:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2022-01-31 08:50:08,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 38 [2022-01-31 08:50:08,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:08,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-01-31 08:50:08,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:08,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2022-01-31 08:50:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:50:08,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:08,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-31 08:50:08,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2022-01-31 08:50:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:50:09,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402394948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:09,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:09,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-01-31 08:50:09,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163910586] [2022-01-31 08:50:09,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:09,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:50:09,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:50:09,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:50:09,134 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 25 states, 24 states have (on average 4.875) internal successors, (117), 23 states have internal predecessors, (117), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:50:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:09,844 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2022-01-31 08:50:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:50:09,845 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.875) internal successors, (117), 23 states have internal predecessors, (117), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2022-01-31 08:50:09,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:09,847 INFO L225 Difference]: With dead ends: 90 [2022-01-31 08:50:09,847 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 08:50:09,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 27 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:50:09,848 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 167 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:09,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 174 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:50:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 08:50:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2022-01-31 08:50:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 53 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:50:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-01-31 08:50:09,855 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 50 [2022-01-31 08:50:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:09,855 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-01-31 08:50:09,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.875) internal successors, (117), 23 states have internal predecessors, (117), 6 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:50:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-01-31 08:50:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 08:50:09,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:09,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:09,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:50:10,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:10,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1931060364, now seen corresponding path program 1 times [2022-01-31 08:50:10,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:10,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110173755] [2022-01-31 08:50:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:10,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:10,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 08:50:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:50:10,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:10,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110173755] [2022-01-31 08:50:10,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110173755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:10,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742073605] [2022-01-31 08:50:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:10,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:10,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:10,398 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) [2022-01-31 08:50:10,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:50:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 105 conjunts are in the unsatisfiable core [2022-01-31 08:50:10,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:10,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:10,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 42 [2022-01-31 08:50:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-01-31 08:50:10,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:10,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 42 [2022-01-31 08:50:10,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2022-01-31 08:50:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:10,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 42 [2022-01-31 08:50:10,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2022-01-31 08:50:10,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:10,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2022-01-31 08:50:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:10,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 50 [2022-01-31 08:50:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:50:11,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:11,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-01-31 08:50:11,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-01-31 08:50:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:50:11,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742073605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:11,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:11,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-31 08:50:11,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435909056] [2022-01-31 08:50:11,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:11,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 08:50:11,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 08:50:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:50:11,882 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 25 states have internal predecessors, (135), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:50:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:12,694 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-01-31 08:50:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:50:12,695 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 25 states have internal predecessors, (135), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 59 [2022-01-31 08:50:12,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:12,696 INFO L225 Difference]: With dead ends: 95 [2022-01-31 08:50:12,696 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 08:50:12,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 108 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 08:50:12,697 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 154 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:12,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 225 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 590 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-01-31 08:50:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 08:50:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2022-01-31 08:50:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:50:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-01-31 08:50:12,702 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 59 [2022-01-31 08:50:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:12,702 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-01-31 08:50:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 25 states have internal predecessors, (135), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:50:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-01-31 08:50:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 08:50:12,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:12,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:12,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 08:50:12,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 08:50:12,920 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1884523694, now seen corresponding path program 2 times [2022-01-31 08:50:12,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:12,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804051844] [2022-01-31 08:50:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:12,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:13,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:13,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 08:50:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:13,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:50:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:50:13,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804051844] [2022-01-31 08:50:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804051844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423286071] [2022-01-31 08:50:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:50:13,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:13,257 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) [2022-01-31 08:50:13,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:50:13,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:50:13,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:50:13,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 08:50:13,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:13,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-01-31 08:50:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:13,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 57 [2022-01-31 08:50:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2022-01-31 08:50:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:13,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 50 [2022-01-31 08:50:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:13,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2022-01-31 08:50:14,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:50:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:50:14,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:14,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:50:14,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 08:50:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 08:50:14,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423286071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:14,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:14,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-31 08:50:14,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590796312] [2022-01-31 08:50:14,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:14,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 08:50:14,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 08:50:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:50:14,402 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 24 states, 24 states have (on average 6.0) internal successors, (144), 23 states have internal predecessors, (144), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:50:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:15,295 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2022-01-31 08:50:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 08:50:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.0) internal successors, (144), 23 states have internal predecessors, (144), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 68 [2022-01-31 08:50:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:15,296 INFO L225 Difference]: With dead ends: 168 [2022-01-31 08:50:15,297 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 08:50:15,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 134 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 08:50:15,298 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 222 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:15,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 253 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 841 Invalid, 0 Unknown, 117 Unchecked, 0.5s Time] [2022-01-31 08:50:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 08:50:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 109. [2022-01-31 08:50:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 94 states have internal predecessors, (104), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 08:50:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2022-01-31 08:50:15,306 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 68 [2022-01-31 08:50:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:15,306 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2022-01-31 08:50:15,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.0) internal successors, (144), 23 states have internal predecessors, (144), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:50:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2022-01-31 08:50:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 08:50:15,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:15,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:15,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:50:15,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:15,509 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1132440268, now seen corresponding path program 3 times [2022-01-31 08:50:15,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:15,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777971721] [2022-01-31 08:50:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:15,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:15,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:15,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 08:50:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:15,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:50:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:15,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 08:50:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:50:15,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:15,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777971721] [2022-01-31 08:50:15,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777971721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:15,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024533882] [2022-01-31 08:50:15,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:50:15,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:15,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:50:15,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:50:16,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 08:50:16,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:50:16,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:50:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:16,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:16,498 INFO L353 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2022-01-31 08:50:16,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 47 [2022-01-31 08:50:16,559 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 08:50:16,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 08:50:16,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 64 [2022-01-31 08:50:16,612 INFO L353 Elim1Store]: treesize reduction 189, result has 12.1 percent of original size [2022-01-31 08:50:16,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 1647 treesize of output 1508 [2022-01-31 08:50:16,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 08:50:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:50:17,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:20,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:50:20,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-01-31 08:50:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:50:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024533882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:20,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:20,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-01-31 08:50:20,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356615145] [2022-01-31 08:50:20,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:20,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 08:50:20,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 08:50:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=592, Unknown=1, NotChecked=0, Total=702 [2022-01-31 08:50:20,406 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 26 states have internal predecessors, (156), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 08:50:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:21,168 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2022-01-31 08:50:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:50:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 26 states have internal predecessors, (156), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 77 [2022-01-31 08:50:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:21,170 INFO L225 Difference]: With dead ends: 178 [2022-01-31 08:50:21,171 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 08:50:21,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 141 SyntacticMatches, 17 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=329, Invalid=1832, Unknown=1, NotChecked=0, Total=2162 [2022-01-31 08:50:21,172 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 130 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:21,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 256 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 721 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2022-01-31 08:50:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 08:50:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 118. [2022-01-31 08:50:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.101010101010101) internal successors, (109), 101 states have internal predecessors, (109), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 08:50:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2022-01-31 08:50:21,184 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 77 [2022-01-31 08:50:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:21,185 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2022-01-31 08:50:21,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.777777777777778) internal successors, (156), 26 states have internal predecessors, (156), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 08:50:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2022-01-31 08:50:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 08:50:21,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:21,188 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:21,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:50:21,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:21,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2108722798, now seen corresponding path program 4 times [2022-01-31 08:50:21,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:21,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344780927] [2022-01-31 08:50:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:21,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:21,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:21,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:21,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 08:50:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:21,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:50:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:21,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 08:50:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:21,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 08:50:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:50:21,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:21,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344780927] [2022-01-31 08:50:21,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344780927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:21,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066012682] [2022-01-31 08:50:21,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:50:21,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:21,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:21,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:50:21,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:50:21,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:50:21,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:50:21,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 08:50:21,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:21,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:21,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 42 [2022-01-31 08:50:21,935 INFO L353 Elim1Store]: treesize reduction 584, result has 8.3 percent of original size [2022-01-31 08:50:21,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 94 [2022-01-31 08:50:21,967 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-01-31 08:50:21,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 45 [2022-01-31 08:50:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 08:50:47,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:49,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 08:50:49,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 08:50:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 08:50:49,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066012682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:49,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:49,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 21 [2022-01-31 08:50:49,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605440993] [2022-01-31 08:50:49,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:49,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:50:49,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:50:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=357, Unknown=5, NotChecked=0, Total=420 [2022-01-31 08:50:49,388 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand has 21 states, 20 states have (on average 4.9) internal successors, (98), 18 states have internal predecessors, (98), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 08:50:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:49,939 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2022-01-31 08:50:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 08:50:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.9) internal successors, (98), 18 states have internal predecessors, (98), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 86 [2022-01-31 08:50:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:49,942 INFO L225 Difference]: With dead ends: 161 [2022-01-31 08:50:49,942 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 08:50:49,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 169 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=142, Invalid=909, Unknown=5, NotChecked=0, Total=1056 [2022-01-31 08:50:49,943 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 56 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:49,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 366 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 992 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-01-31 08:50:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 08:50:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 130. [2022-01-31 08:50:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 108 states have (on average 1.1018518518518519) internal successors, (119), 110 states have internal predecessors, (119), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 08:50:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-01-31 08:50:49,949 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 86 [2022-01-31 08:50:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:49,949 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-01-31 08:50:49,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.9) internal successors, (98), 18 states have internal predecessors, (98), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 08:50:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-01-31 08:50:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 08:50:49,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:49,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:49,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:50:50,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:50,154 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1867030796, now seen corresponding path program 5 times [2022-01-31 08:50:50,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:50,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113542635] [2022-01-31 08:50:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:50,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 08:50:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:50:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 08:50:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 08:50:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 08:50:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-31 08:50:50,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113542635] [2022-01-31 08:50:50,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113542635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814550282] [2022-01-31 08:50:50,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:50:50,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:50,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:50:50,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:50:52,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 08:50:52,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:50:52,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:50:52,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-31 08:50:53,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:50:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-31 08:50:53,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814550282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:50:53,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:50:53,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2022-01-31 08:50:53,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342186917] [2022-01-31 08:50:53,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:50:53,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 08:50:53,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:50:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 08:50:53,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 08:50:53,643 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 34 states, 34 states have (on average 5.323529411764706) internal successors, (181), 33 states have internal predecessors, (181), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 08:50:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:50:54,224 INFO L93 Difference]: Finished difference Result 227 states and 242 transitions. [2022-01-31 08:50:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 08:50:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.323529411764706) internal successors, (181), 33 states have internal predecessors, (181), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 95 [2022-01-31 08:50:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:50:54,226 INFO L225 Difference]: With dead ends: 227 [2022-01-31 08:50:54,226 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 08:50:54,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 08:50:54,227 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 316 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:50:54,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 135 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:50:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 08:50:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2022-01-31 08:50:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 100 states have internal predecessors, (107), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 08:50:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2022-01-31 08:50:54,232 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 95 [2022-01-31 08:50:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:50:54,232 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2022-01-31 08:50:54,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.323529411764706) internal successors, (181), 33 states have internal predecessors, (181), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 08:50:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2022-01-31 08:50:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 08:50:54,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:50:54,233 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:50:54,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:50:54,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:54,439 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:50:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:50:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1345994321, now seen corresponding path program 6 times [2022-01-31 08:50:54,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:50:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197212357] [2022-01-31 08:50:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:50:54,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:50:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:50:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:50:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 08:50:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 08:50:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 08:50:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 08:50:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 08:50:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:50:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 08:50:55,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:50:55,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197212357] [2022-01-31 08:50:55,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197212357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:50:55,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090607350] [2022-01-31 08:50:55,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:50:55,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:50:55,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:50:55,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:50:55,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:50:57,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 08:50:57,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:50:57,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:50:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:50:57,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 08:50:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:50:57,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2022-01-31 08:50:57,926 INFO L353 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-01-31 08:50:57,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2022-01-31 08:50:58,017 INFO L353 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2022-01-31 08:50:58,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 67 [2022-01-31 08:50:58,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:50:58,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:50:58,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-31 08:50:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 51 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-31 08:50:58,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:01,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_1756 Int)) (< (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* main_~i~0 20) (- 4) |c_main_~#volArray~0.offset|) v_ArrVal_1756) (+ 16 |c_main_~#volArray~0.offset|)) c_main_~MINVAL~0)) (let ((.cse1 (div c_~CELLCOUNT~0 5))) (let ((.cse0 (<= (+ main_~i~0 1) .cse1))) (and (or .cse0 (< c_~CELLCOUNT~0 0)) (or .cse0 (not (= (mod c_~CELLCOUNT~0 5) 0))) (<= main_~i~0 .cse1)))))) is different from false [2022-01-31 08:51:01,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-01-31 08:51:01,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28377064 treesize of output 28311528 [2022-01-31 08:51:55,127 WARN L228 SmtUtils]: Spent 53.61s on a formula simplification that was a NOOP. DAG size: 4678 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 08:56:50,265 WARN L228 SmtUtils]: Spent 3.14m on a formula simplification. DAG size of input: 4663 DAG size of output: 4663 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 09:00:06,297 WARN L228 SmtUtils]: Spent 45.85s on a formula simplification. DAG size of input: 2159 DAG size of output: 2159 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 09:01:55,379 WARN L228 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 2019 DAG size of output: 2019 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 09:02:36,521 WARN L228 SmtUtils]: Spent 28.02s on a formula simplification. DAG size of input: 2017 DAG size of output: 2017 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 09:04:02,476 WARN L228 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 2015 DAG size of output: 2015 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)