/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-crafted/zero_sum1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:51:05,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:51:05,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:51:05,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:51:05,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:51:05,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:51:05,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:51:05,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:51:05,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:51:05,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:51:05,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:51:05,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:51:05,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:51:05,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:51:05,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:51:05,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:51:05,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:51:05,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:51:05,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:51:05,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:51:05,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:51:05,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:51:05,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:51:05,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:51:05,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:51:05,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:51:05,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:51:05,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:51:05,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:51:05,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:51:05,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:51:05,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:51:05,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:51:05,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:51:05,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:51:05,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:51:05,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:51:05,600 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:51:05,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:51:05,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:51:05,602 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:51:05,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:51:05,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:51:05,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:51:05,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:51:05,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:51:05,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:51:05,603 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:51:05,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:51:05,603 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:51:05,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:51:05,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:51:05,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:51:05,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:51:05,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:51:05,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:51:05,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:51:05,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:51:05,604 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:51:05,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:51:05,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:51:05,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:51:05,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:51:05,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:51:05,795 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:51:05,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum1.c [2022-01-31 09:51:05,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a12e10c/823a80f1162f4c43b73a76355d07c3b6/FLAGb2a46c22c [2022-01-31 09:51:06,193 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:51:06,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum1.c [2022-01-31 09:51:06,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a12e10c/823a80f1162f4c43b73a76355d07c3b6/FLAGb2a46c22c [2022-01-31 09:51:06,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7a12e10c/823a80f1162f4c43b73a76355d07c3b6 [2022-01-31 09:51:06,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:51:06,211 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:51:06,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:51:06,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:51:06,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:51:06,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b6ce98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06, skipping insertion in model container [2022-01-31 09:51:06,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:51:06,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:51:06,346 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-crafted/zero_sum1.c[400,413] [2022-01-31 09:51:06,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:51:06,371 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:51:06,378 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-crafted/zero_sum1.c[400,413] [2022-01-31 09:51:06,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:51:06,390 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:51:06,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06 WrapperNode [2022-01-31 09:51:06,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:51:06,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:51:06,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:51:06,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:51:06,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:51:06,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:51:06,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:51:06,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:51:06,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:51:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:06,448 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 09:51:06,453 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 09:51:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:51:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:51:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:51:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:51:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:51:06,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:51:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:51:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:51:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:51:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:51:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:51:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:51:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:51:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:51:06,528 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:51:06,529 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:51:06,604 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:51:06,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:51:06,608 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 09:51:06,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:51:06 BoogieIcfgContainer [2022-01-31 09:51:06,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:51:06,610 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:51:06,610 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:51:06,611 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:51:06,613 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:51:06" (1/1) ... [2022-01-31 09:51:06,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:51:06 BasicIcfg [2022-01-31 09:51:06,623 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:51:06,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:51:06,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:51:06,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:51:06,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:51:06" (1/4) ... [2022-01-31 09:51:06,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5993e681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:51:06, skipping insertion in model container [2022-01-31 09:51:06,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:51:06" (2/4) ... [2022-01-31 09:51:06,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5993e681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:51:06, skipping insertion in model container [2022-01-31 09:51:06,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:51:06" (3/4) ... [2022-01-31 09:51:06,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5993e681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:51:06, skipping insertion in model container [2022-01-31 09:51:06,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:51:06" (4/4) ... [2022-01-31 09:51:06,630 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum1.cJordan [2022-01-31 09:51:06,634 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:51:06,634 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:51:06,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:51:06,664 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 09:51:06,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:51:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:51:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 09:51:06,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:06,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:06,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash 573395949, now seen corresponding path program 1 times [2022-01-31 09:51:06,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:06,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554273307] [2022-01-31 09:51:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:06,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:06,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:06,852 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 09:51:06,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:06,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554273307] [2022-01-31 09:51:06,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554273307] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:51:06,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:51:06,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:51:06,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280453711] [2022-01-31 09:51:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:51:06,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:51:06,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:51:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:51:06,880 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:06,929 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-01-31 09:51:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:51:06,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 09:51:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:06,936 INFO L225 Difference]: With dead ends: 28 [2022-01-31 09:51:06,936 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 09:51:06,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:51:06,939 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:06,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 09:51:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 09:51:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 09:51:06,958 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-01-31 09:51:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:06,959 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 09:51:06,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 09:51:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 09:51:06,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:06,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:06,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:51:06,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash -345631312, now seen corresponding path program 1 times [2022-01-31 09:51:06,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:06,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800621885] [2022-01-31 09:51:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:06,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,032 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 09:51:07,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:07,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800621885] [2022-01-31 09:51:07,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800621885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:51:07,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:51:07,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:51:07,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502743232] [2022-01-31 09:51:07,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:51:07,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:51:07,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:51:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:51:07,035 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:07,062 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-01-31 09:51:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:51:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 09:51:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:07,063 INFO L225 Difference]: With dead ends: 22 [2022-01-31 09:51:07,063 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 09:51:07,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 09:51:07,064 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:07,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 09:51:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-31 09:51:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 09:51:07,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-01-31 09:51:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:07,068 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 09:51:07,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 09:51:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 09:51:07,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:07,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:07,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:51:07,069 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1527787635, now seen corresponding path program 1 times [2022-01-31 09:51:07,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:07,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253306762] [2022-01-31 09:51:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:07,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:51:07,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253306762] [2022-01-31 09:51:07,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253306762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:51:07,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:51:07,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:51:07,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063893646] [2022-01-31 09:51:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:51:07,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:51:07,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:51:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:51:07,126 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:07,187 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 09:51:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:51:07,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 09:51:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:07,188 INFO L225 Difference]: With dead ends: 25 [2022-01-31 09:51:07,188 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 09:51:07,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:51:07,189 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:07,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 09:51:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-31 09:51:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-31 09:51:07,192 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2022-01-31 09:51:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:07,192 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-31 09:51:07,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-31 09:51:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:51:07,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:07,193 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] [2022-01-31 09:51:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:51:07,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash -978356951, now seen corresponding path program 1 times [2022-01-31 09:51:07,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:07,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086320592] [2022-01-31 09:51:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:07,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 09:51:07,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086320592] [2022-01-31 09:51:07,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086320592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509849253] [2022-01-31 09:51:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:07,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:07,264 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 09:51:07,295 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 09:51:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:51:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 09:51:07,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 09:51:07,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509849253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:07,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:07,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:51:07,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364452530] [2022-01-31 09:51:07,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:07,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:51:07,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:07,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:51:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:51:07,522 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:07,555 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 09:51:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:51:07,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 09:51:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:07,560 INFO L225 Difference]: With dead ends: 26 [2022-01-31 09:51:07,560 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 09:51:07,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:51:07,581 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:07,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 09:51:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-31 09:51:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-31 09:51:07,584 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2022-01-31 09:51:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:07,584 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-31 09:51:07,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-31 09:51:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 09:51:07,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:07,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:07,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:07,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:07,802 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2146724538, now seen corresponding path program 2 times [2022-01-31 09:51:07,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:07,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181155401] [2022-01-31 09:51:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:07,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:51:07,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:07,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181155401] [2022-01-31 09:51:07,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181155401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:07,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951752974] [2022-01-31 09:51:07,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:51:07,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:07,903 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 09:51:07,943 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 09:51:07,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:51:07,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:51:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:51:08,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:51:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951752974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:08,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:08,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-31 09:51:08,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833026353] [2022-01-31 09:51:08,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:08,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 09:51:08,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 09:51:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:51:08,123 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:08,176 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-01-31 09:51:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:51:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 09:51:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:08,177 INFO L225 Difference]: With dead ends: 31 [2022-01-31 09:51:08,177 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 09:51:08,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:51:08,178 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:08,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:51:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 09:51:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-31 09:51:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 09:51:08,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-01-31 09:51:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:08,182 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 09:51:08,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 09:51:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:51:08,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:08,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:08,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:08,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:08,399 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1671229854, now seen corresponding path program 3 times [2022-01-31 09:51:08,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:08,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662551408] [2022-01-31 09:51:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:08,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:08,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:08,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662551408] [2022-01-31 09:51:08,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662551408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519350848] [2022-01-31 09:51:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:51:08,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:08,892 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 09:51:08,893 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 09:51:08,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:51:08,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 09:51:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:09,019 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 15 treesize of output 11 [2022-01-31 09:51:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:09,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:09,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2022-01-31 09:51:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:09,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:11,453 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 72 treesize of output 64 [2022-01-31 09:51:11,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:11,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 246 treesize of output 215 [2022-01-31 09:51:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:11,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519350848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:11,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:11,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 21] total 50 [2022-01-31 09:51:11,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529389701] [2022-01-31 09:51:11,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:11,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:51:11,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:51:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:51:11,748 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:12,972 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-01-31 09:51:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 09:51:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 09:51:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:12,975 INFO L225 Difference]: With dead ends: 67 [2022-01-31 09:51:12,975 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 09:51:12,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=589, Invalid=5111, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 09:51:12,978 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:12,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 169 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 284 Invalid, 0 Unknown, 327 Unchecked, 0.1s Time] [2022-01-31 09:51:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 09:51:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2022-01-31 09:51:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-01-31 09:51:12,992 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 28 [2022-01-31 09:51:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-01-31 09:51:12,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-01-31 09:51:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 09:51:12,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:12,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:13,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 09:51:13,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:13,218 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1177275744, now seen corresponding path program 4 times [2022-01-31 09:51:13,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:13,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559530248] [2022-01-31 09:51:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:13,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:13,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:51:13,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:13,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559530248] [2022-01-31 09:51:13,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559530248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:13,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422394789] [2022-01-31 09:51:13,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:51:13,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:13,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:13,303 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 09:51:13,305 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 09:51:13,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:51:13,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:13,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:51:13,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:51:13,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:51:13,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422394789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:13,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:13,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 09:51:13,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833004722] [2022-01-31 09:51:13,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:13,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 09:51:13,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 09:51:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-31 09:51:13,465 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:13,577 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-01-31 09:51:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:51:13,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 09:51:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:13,578 INFO L225 Difference]: With dead ends: 58 [2022-01-31 09:51:13,578 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 09:51:13,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:51:13,579 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:13,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 09:51:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-31 09:51:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-01-31 09:51:13,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 30 [2022-01-31 09:51:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:13,582 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-01-31 09:51:13,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-01-31 09:51:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:51:13,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:13,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:13,610 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 09:51:13,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:13,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:13,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1042841725, now seen corresponding path program 5 times [2022-01-31 09:51:13,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:13,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076102753] [2022-01-31 09:51:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:13,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:13,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:13,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:13,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076102753] [2022-01-31 09:51:13,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076102753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:13,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765460070] [2022-01-31 09:51:13,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:51:13,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:13,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:13,889 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 09:51:13,890 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 09:51:13,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 09:51:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:51:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:14,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:14,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765460070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:14,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:14,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-31 09:51:14,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840888848] [2022-01-31 09:51:14,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:14,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:51:14,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:51:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:51:14,106 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:14,273 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-01-31 09:51:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:51:14,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 09:51:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:14,274 INFO L225 Difference]: With dead ends: 49 [2022-01-31 09:51:14,274 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 09:51:14,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:51:14,275 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:14,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 52 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 09:51:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2022-01-31 09:51:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 09:51:14,277 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2022-01-31 09:51:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:14,278 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 09:51:14,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 09:51:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 09:51:14,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:14,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:14,295 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 09:51:14,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:14,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash 47862107, now seen corresponding path program 6 times [2022-01-31 09:51:14,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:14,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199389076] [2022-01-31 09:51:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:14,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:15,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:15,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:15,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199389076] [2022-01-31 09:51:15,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199389076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:15,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565768584] [2022-01-31 09:51:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:51:15,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:15,022 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 09:51:15,023 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 09:51:15,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 09:51:15,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:15,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 09:51:15,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:15,169 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 15 treesize of output 11 [2022-01-31 09:51:15,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:15,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:15,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 41 [2022-01-31 09:51:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:22,700 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 132 treesize of output 116 [2022-01-31 09:51:22,747 INFO L353 Elim1Store]: treesize reduction 79, result has 10.2 percent of original size [2022-01-31 09:51:22,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1326 treesize of output 999 [2022-01-31 09:51:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565768584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:24,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:24,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 63 [2022-01-31 09:51:24,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995400214] [2022-01-31 09:51:24,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:24,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 09:51:24,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 09:51:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3522, Unknown=2, NotChecked=0, Total=3906 [2022-01-31 09:51:24,233 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 60 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:33,117 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-01-31 09:51:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 09:51:33,117 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 60 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 09:51:33,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:33,118 INFO L225 Difference]: With dead ends: 87 [2022-01-31 09:51:33,118 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 09:51:33,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=800, Invalid=7568, Unknown=4, NotChecked=0, Total=8372 [2022-01-31 09:51:33,120 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:33,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 165 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 518 Invalid, 0 Unknown, 374 Unchecked, 0.3s Time] [2022-01-31 09:51:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 09:51:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2022-01-31 09:51:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2022-01-31 09:51:33,123 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 34 [2022-01-31 09:51:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:33,123 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2022-01-31 09:51:33,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 60 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2022-01-31 09:51:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 09:51:33,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:33,125 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:33,143 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 09:51:33,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:33,343 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:33,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash -337758695, now seen corresponding path program 7 times [2022-01-31 09:51:33,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:33,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611199195] [2022-01-31 09:51:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:33,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:33,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:33,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:33,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611199195] [2022-01-31 09:51:33,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611199195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:33,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177718247] [2022-01-31 09:51:33,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:51:33,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:33,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:33,420 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 09:51:33,421 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 09:51:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:51:33,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:33,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:33,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177718247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:33,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:33,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:51:33,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962788488] [2022-01-31 09:51:33,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:33,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:51:33,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:51:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:51:33,620 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:33,726 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-01-31 09:51:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:51:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 09:51:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:33,727 INFO L225 Difference]: With dead ends: 70 [2022-01-31 09:51:33,727 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 09:51:33,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:51:33,728 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:33,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 47 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 09:51:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 09:51:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-01-31 09:51:33,734 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 36 [2022-01-31 09:51:33,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:33,734 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-01-31 09:51:33,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-01-31 09:51:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 09:51:33,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:33,735 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:33,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:33,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:33,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash -262316170, now seen corresponding path program 8 times [2022-01-31 09:51:33,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:33,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768658737] [2022-01-31 09:51:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:33,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:34,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:51:34,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768658737] [2022-01-31 09:51:34,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768658737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071102662] [2022-01-31 09:51:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:51:34,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:34,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:34,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:34,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:51:34,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:51:34,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:34,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 09:51:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:51:34,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:51:34,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071102662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:34,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:34,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 09:51:34,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113010005] [2022-01-31 09:51:34,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:34,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 09:51:34,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 09:51:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:51:34,278 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:34,403 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-01-31 09:51:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:51:34,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 09:51:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:34,403 INFO L225 Difference]: With dead ends: 57 [2022-01-31 09:51:34,404 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 09:51:34,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-31 09:51:34,404 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:34,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 09:51:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2022-01-31 09:51:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-31 09:51:34,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2022-01-31 09:51:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:34,407 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-31 09:51:34,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-31 09:51:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 09:51:34,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:34,407 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:34,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:34,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 09:51:34,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1354411540, now seen corresponding path program 9 times [2022-01-31 09:51:34,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:34,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087088822] [2022-01-31 09:51:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:34,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:35,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:35,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:35,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087088822] [2022-01-31 09:51:35,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087088822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:35,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807560137] [2022-01-31 09:51:35,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:51:35,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:35,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:35,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:51:35,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 09:51:35,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 09:51:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:35,516 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 15 treesize of output 11 [2022-01-31 09:51:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:37,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:37,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:37,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:37,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2022-01-31 09:51:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:37,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:40,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807560137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:40,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:40,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 24] total 71 [2022-01-31 09:51:40,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736451270] [2022-01-31 09:51:40,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:40,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 09:51:40,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 09:51:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4621, Unknown=1, NotChecked=0, Total=4970 [2022-01-31 09:51:40,047 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 68 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:42,901 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-01-31 09:51:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 09:51:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 68 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 09:51:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:42,902 INFO L225 Difference]: With dead ends: 80 [2022-01-31 09:51:42,902 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 09:51:42,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=734, Invalid=10395, Unknown=1, NotChecked=0, Total=11130 [2022-01-31 09:51:42,904 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:42,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 199 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 664 Invalid, 0 Unknown, 455 Unchecked, 0.3s Time] [2022-01-31 09:51:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 09:51:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2022-01-31 09:51:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-01-31 09:51:42,908 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2022-01-31 09:51:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:42,908 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-01-31 09:51:42,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 68 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-01-31 09:51:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 09:51:42,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:42,909 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:42,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:43,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:43,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1125795986, now seen corresponding path program 10 times [2022-01-31 09:51:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137742325] [2022-01-31 09:51:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:43,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:51:43,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:43,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137742325] [2022-01-31 09:51:43,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137742325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:43,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329700088] [2022-01-31 09:51:43,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:51:43,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:43,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:43,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:43,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:51:43,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:51:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:51:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:51:43,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:51:43,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329700088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:43,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:43,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 09:51:43,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551277515] [2022-01-31 09:51:43,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:43,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:51:43,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:43,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:51:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:51:43,455 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:43,592 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-01-31 09:51:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:51:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 09:51:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:43,593 INFO L225 Difference]: With dead ends: 69 [2022-01-31 09:51:43,593 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 09:51:43,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-01-31 09:51:43,594 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:43,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 52 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 09:51:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-31 09:51:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-01-31 09:51:43,596 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 42 [2022-01-31 09:51:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:43,596 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-01-31 09:51:43,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-01-31 09:51:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 09:51:43,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:43,597 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:43,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:43,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 09:51:43,825 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1015400401, now seen corresponding path program 11 times [2022-01-31 09:51:43,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:43,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878667939] [2022-01-31 09:51:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:43,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:51:43,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878667939] [2022-01-31 09:51:43,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878667939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938177148] [2022-01-31 09:51:43,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:51:43,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:43,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:43,927 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:43,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:51:43,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 09:51:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:43,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 09:51:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:51:44,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:51:44,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938177148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:44,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:44,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-31 09:51:44,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100563520] [2022-01-31 09:51:44,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:44,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:51:44,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:51:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:51:44,258 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:44,508 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-01-31 09:51:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:51:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 09:51:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:44,509 INFO L225 Difference]: With dead ends: 49 [2022-01-31 09:51:44,509 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 09:51:44,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:51:44,510 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:44,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 75 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 09:51:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-01-31 09:51:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-01-31 09:51:44,512 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2022-01-31 09:51:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:44,512 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-01-31 09:51:44,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-01-31 09:51:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 09:51:44,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:44,513 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:44,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:44,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:51:44,729 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1760924813, now seen corresponding path program 12 times [2022-01-31 09:51:44,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181901644] [2022-01-31 09:51:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:44,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:45,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:45,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:45,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181901644] [2022-01-31 09:51:45,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181901644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:45,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653506843] [2022-01-31 09:51:45,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:51:45,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:45,676 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:45,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:51:45,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 09:51:45,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 09:51:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:45,810 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 15 treesize of output 11 [2022-01-31 09:51:46,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:46,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 85 [2022-01-31 09:51:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:51:47,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:51:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653506843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:51,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:51,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 28] total 83 [2022-01-31 09:51:51,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178134726] [2022-01-31 09:51:51,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:51,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 09:51:51,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 09:51:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=6427, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 09:51:51,059 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 80 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:53,556 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-01-31 09:51:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 09:51:53,556 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 80 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 09:51:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:53,557 INFO L225 Difference]: With dead ends: 65 [2022-01-31 09:51:53,557 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 09:51:53,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=760, Invalid=13046, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 09:51:53,560 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:53,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 310 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 925 Invalid, 0 Unknown, 725 Unchecked, 0.4s Time] [2022-01-31 09:51:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 09:51:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-01-31 09:51:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-01-31 09:51:53,562 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 46 [2022-01-31 09:51:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:53,562 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-01-31 09:51:53,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 80 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-01-31 09:51:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:51:53,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:53,562 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:53,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 09:51:53,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 09:51:53,771 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 943027403, now seen corresponding path program 13 times [2022-01-31 09:51:53,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:53,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173808996] [2022-01-31 09:51:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:53,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:53,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:51:53,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:53,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173808996] [2022-01-31 09:51:53,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173808996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:53,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496660030] [2022-01-31 09:51:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:51:53,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:53,882 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:53,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:51:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:53,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:51:53,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:51:54,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:51:54,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496660030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:54,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:54,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 09:51:54,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351247404] [2022-01-31 09:51:54,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:54,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:51:54,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:51:54,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:51:54,190 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:54,373 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2022-01-31 09:51:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:51:54,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 09:51:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:54,373 INFO L225 Difference]: With dead ends: 79 [2022-01-31 09:51:54,373 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:51:54,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2022-01-31 09:51:54,374 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:54,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 51 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:51:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-01-31 09:51:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-01-31 09:51:54,380 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2022-01-31 09:51:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:54,381 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-01-31 09:51:54,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-01-31 09:51:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 09:51:54,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:54,381 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:54,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 09:51:54,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 400063144, now seen corresponding path program 14 times [2022-01-31 09:51:54,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:54,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934985107] [2022-01-31 09:51:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:54,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:54,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:51:54,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934985107] [2022-01-31 09:51:54,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934985107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:54,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439584188] [2022-01-31 09:51:54,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:51:54,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:54,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:54,714 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:54,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:51:54,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:51:54,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:54,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:51:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:51:54,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:51:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:51:54,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439584188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:51:54,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:51:54,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 09:51:54,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632424321] [2022-01-31 09:51:54,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:51:54,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:51:54,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:51:54,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:51:54,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-01-31 09:51:54,985 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:51:55,161 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-01-31 09:51:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 09:51:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 09:51:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:51:55,162 INFO L225 Difference]: With dead ends: 55 [2022-01-31 09:51:55,162 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 09:51:55,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 09:51:55,162 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:51:55,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 41 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:51:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 09:51:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-01-31 09:51:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-01-31 09:51:55,164 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2022-01-31 09:51:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:51:55,164 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-01-31 09:51:55,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:51:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-01-31 09:51:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 09:51:55,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:51:55,165 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:51:55,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 09:51:55,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:55,375 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:51:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:51:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1086878918, now seen corresponding path program 15 times [2022-01-31 09:51:55,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:51:55,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313677390] [2022-01-31 09:51:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:51:55,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:51:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:56,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:51:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:51:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:51:56,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:51:56,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313677390] [2022-01-31 09:51:56,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313677390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:51:56,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571196995] [2022-01-31 09:51:56,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:51:56,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:51:56,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:51:56,846 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:51:56,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:51:56,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 09:51:56,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:51:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-31 09:51:56,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:51:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:51:58,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:51:58,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 103 [2022-01-31 09:51:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 09:51:59,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:03,734 INFO L353 Elim1Store]: treesize reduction 710, result has 31.4 percent of original size [2022-01-31 09:52:03,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 222 treesize of output 359 [2022-01-31 09:52:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 09:52:50,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571196995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:50,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:50,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35, 32] total 97 [2022-01-31 09:52:50,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137031981] [2022-01-31 09:52:50,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:50,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 09:52:50,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:50,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 09:52:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=8720, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 09:52:50,681 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 97 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 94 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:54,684 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-01-31 09:52:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 09:52:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 94 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 09:52:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:54,685 INFO L225 Difference]: With dead ends: 74 [2022-01-31 09:52:54,685 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 09:52:54,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1222, Invalid=17410, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 09:52:54,686 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1104 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:54,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 224 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1088 Invalid, 0 Unknown, 1104 Unchecked, 0.5s Time] [2022-01-31 09:52:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 09:52:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2022-01-31 09:52:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-01-31 09:52:54,688 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 52 [2022-01-31 09:52:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:54,688 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-01-31 09:52:54,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 94 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-01-31 09:52:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 09:52:54,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:54,689 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:54,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 09:52:54,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:52:54,902 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:54,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1724984004, now seen corresponding path program 16 times [2022-01-31 09:52:54,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:54,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426909861] [2022-01-31 09:52:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:54,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:55,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:52:55,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:55,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426909861] [2022-01-31 09:52:55,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426909861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:55,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711221972] [2022-01-31 09:52:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:52:55,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:55,016 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:52:55,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 09:52:55,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:52:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:52:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:52:55,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:52:55,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711221972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:55,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:55,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 09:52:55,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12935095] [2022-01-31 09:52:55,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:55,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:52:55,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:55,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:52:55,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-01-31 09:52:55,334 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:55,535 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-01-31 09:52:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 09:52:55,536 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 09:52:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:55,536 INFO L225 Difference]: With dead ends: 89 [2022-01-31 09:52:55,536 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 09:52:55,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:52:55,537 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:55,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 46 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:52:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 09:52:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 09:52:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-01-31 09:52:55,539 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 54 [2022-01-31 09:52:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:55,539 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-01-31 09:52:55,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-01-31 09:52:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 09:52:55,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:55,539 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:55,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 09:52:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:55,753 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash -367159583, now seen corresponding path program 17 times [2022-01-31 09:52:55,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:55,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491874761] [2022-01-31 09:52:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:55,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:55,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:52:55,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:55,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491874761] [2022-01-31 09:52:55,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491874761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:55,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735297197] [2022-01-31 09:52:55,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:52:55,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:55,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:55,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:52:55,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 09:52:55,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 09:52:55,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:52:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:52:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:52:56,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:52:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:52:56,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735297197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:52:56,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:52:56,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-01-31 09:52:56,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931598556] [2022-01-31 09:52:56,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:52:56,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 09:52:56,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:52:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 09:52:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:52:56,396 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:56,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:52:56,710 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-01-31 09:52:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:52:56,711 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 09:52:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:52:56,711 INFO L225 Difference]: With dead ends: 61 [2022-01-31 09:52:56,711 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 09:52:56,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 09:52:56,712 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:52:56,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 67 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:52:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 09:52:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-01-31 09:52:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-01-31 09:52:56,714 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2022-01-31 09:52:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:52:56,714 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-01-31 09:52:56,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:52:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-01-31 09:52:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 09:52:56,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:52:56,714 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:52:56,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 09:52:56,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:56,923 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:52:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:52:56,923 INFO L85 PathProgramCache]: Analyzing trace with hash 649903807, now seen corresponding path program 18 times [2022-01-31 09:52:56,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:52:56,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925211351] [2022-01-31 09:52:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:52:56,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:52:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:58,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:52:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:52:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:52:58,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:52:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925211351] [2022-01-31 09:52:58,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925211351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:52:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172843716] [2022-01-31 09:52:58,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:52:58,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:52:58,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:52:58,452 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:52:58,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 09:52:58,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 09:52:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:52:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 76 conjunts are in the unsatisfiable core [2022-01-31 09:52:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:01,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:53:01,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 251 [2022-01-31 09:53:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 98 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:53:01,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:07,783 INFO L353 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2022-01-31 09:53:07,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 268 treesize of output 351 [2022-01-31 09:53:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 09:53:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172843716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:17,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:17,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 37, 36] total 108 [2022-01-31 09:53:17,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446454481] [2022-01-31 09:53:17,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:17,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 09:53:17,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 09:53:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=10913, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 09:53:17,403 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 108 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 105 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:23,210 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-01-31 09:53:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 09:53:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 105 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 09:53:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:23,211 INFO L225 Difference]: With dead ends: 80 [2022-01-31 09:53:23,211 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 09:53:23,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4511 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1374, Invalid=23118, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 09:53:23,212 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 840 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:23,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 289 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1525 Invalid, 0 Unknown, 840 Unchecked, 0.7s Time] [2022-01-31 09:53:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 09:53:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2022-01-31 09:53:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-01-31 09:53:23,214 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2022-01-31 09:53:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:23,214 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-01-31 09:53:23,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 105 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-01-31 09:53:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 09:53:23,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:23,215 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:23,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:23,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:23,415 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1596269955, now seen corresponding path program 19 times [2022-01-31 09:53:23,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067844375] [2022-01-31 09:53:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:23,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:23,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:53:23,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067844375] [2022-01-31 09:53:23,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067844375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481088669] [2022-01-31 09:53:23,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:53:23,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:23,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:23,563 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:23,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 09:53:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:23,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:53:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:53:23,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 09:53:23,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481088669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:23,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:23,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 09:53:23,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451226133] [2022-01-31 09:53:23,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:23,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:53:23,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:53:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:53:23,929 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:24,131 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2022-01-31 09:53:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:53:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 09:53:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:24,133 INFO L225 Difference]: With dead ends: 99 [2022-01-31 09:53:24,133 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:53:24,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:53:24,133 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:24,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 56 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:53:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:53:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 09:53:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-01-31 09:53:24,135 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 60 [2022-01-31 09:53:24,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:24,135 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-01-31 09:53:24,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:24,135 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-01-31 09:53:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 09:53:24,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:24,136 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:24,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:24,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:24,344 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1707410214, now seen corresponding path program 20 times [2022-01-31 09:53:24,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:24,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824440163] [2022-01-31 09:53:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:24,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:24,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 09:53:24,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:24,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824440163] [2022-01-31 09:53:24,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824440163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:24,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418113018] [2022-01-31 09:53:24,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:53:24,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:24,486 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:24,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 09:53:24,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:53:24,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:53:24,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:53:24,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 09:53:24,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:53:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 09:53:24,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418113018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:53:24,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:53:24,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 09:53:24,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116044020] [2022-01-31 09:53:24,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:53:24,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:53:24,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:53:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:53:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:53:24,868 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:53:25,088 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-01-31 09:53:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 09:53:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 09:53:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:53:25,089 INFO L225 Difference]: With dead ends: 67 [2022-01-31 09:53:25,089 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:53:25,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=436, Invalid=1204, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 09:53:25,090 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 133 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:53:25,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:53:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:53:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-01-31 09:53:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-01-31 09:53:25,091 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2022-01-31 09:53:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:53:25,092 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-01-31 09:53:25,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:53:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-01-31 09:53:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 09:53:25,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:53:25,092 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:53:25,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 09:53:25,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 09:53:25,311 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:53:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:53:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash -911744392, now seen corresponding path program 21 times [2022-01-31 09:53:25,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:53:25,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174132315] [2022-01-31 09:53:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:53:25,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:53:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:27,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:53:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:53:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:53:27,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:53:27,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174132315] [2022-01-31 09:53:27,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174132315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:53:27,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551593536] [2022-01-31 09:53:27,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:53:27,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:53:27,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:53:27,446 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:53:27,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 09:53:27,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 09:53:27,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:53:27,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 95 conjunts are in the unsatisfiable core [2022-01-31 09:53:27,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:53:27,668 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 15 treesize of output 11 [2022-01-31 09:53:27,689 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 15 treesize of output 11 [2022-01-31 09:53:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:53:30,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:53:30,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 169 [2022-01-31 09:53:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 9 proven. 167 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 09:53:31,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:54:05,882 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 406 treesize of output 374 [2022-01-31 09:54:08,198 INFO L353 Elim1Store]: treesize reduction 474, result has 3.5 percent of original size [2022-01-31 09:54:08,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 160197191 treesize of output 117729880 [2022-01-31 09:57:33,616 WARN L228 SmtUtils]: Spent 3.42m on a formula simplification that was a NOOP. DAG size: 27764 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 10:00:55,977 WARN L228 SmtUtils]: Spent 3.37m on a formula simplification that was a NOOP. DAG size: 16760 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 10:00:56,694 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 10:00:56,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:00:56,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 10:00:56,904 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-31 10:00:56,910 INFO L158 Benchmark]: Toolchain (without parser) took 590698.11ms. Allocated memory was 201.3MB in the beginning and 972.0MB in the end (delta: 770.7MB). Free memory was 151.7MB in the beginning and 572.4MB in the end (delta: -420.7MB). Peak memory consumption was 608.4MB. Max. memory is 8.0GB. [2022-01-31 10:00:56,910 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 201.3MB. Free memory is still 167.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 10:00:56,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.98ms. Allocated memory is still 201.3MB. Free memory was 151.5MB in the beginning and 178.0MB in the end (delta: -26.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 10:00:56,910 INFO L158 Benchmark]: Boogie Preprocessor took 35.83ms. Allocated memory is still 201.3MB. Free memory was 178.0MB in the beginning and 176.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 10:00:56,910 INFO L158 Benchmark]: RCFGBuilder took 182.56ms. Allocated memory is still 201.3MB. Free memory was 176.5MB in the beginning and 165.4MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 10:00:56,910 INFO L158 Benchmark]: IcfgTransformer took 13.46ms. Allocated memory is still 201.3MB. Free memory was 165.4MB in the beginning and 164.4MB in the end (delta: 993.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 10:00:56,910 INFO L158 Benchmark]: TraceAbstraction took 590284.91ms. Allocated memory was 201.3MB in the beginning and 972.0MB in the end (delta: 770.7MB). Free memory was 163.9MB in the beginning and 572.4MB in the end (delta: -408.5MB). Peak memory consumption was 621.2MB. Max. memory is 8.0GB. [2022-01-31 10:00:56,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 201.3MB. Free memory is still 167.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 177.98ms. Allocated memory is still 201.3MB. Free memory was 151.5MB in the beginning and 178.0MB in the end (delta: -26.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.83ms. Allocated memory is still 201.3MB. Free memory was 178.0MB in the beginning and 176.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 182.56ms. Allocated memory is still 201.3MB. Free memory was 176.5MB in the beginning and 165.4MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.46ms. Allocated memory is still 201.3MB. Free memory was 165.4MB in the beginning and 164.4MB in the end (delta: 993.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 590284.91ms. Allocated memory was 201.3MB in the beginning and 972.0MB in the end (delta: 770.7MB). Free memory was 163.9MB in the beginning and 572.4MB in the end (delta: -408.5MB). Peak memory consumption was 621.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-31 10:00:57,115 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-01-31 10:00:57,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...