/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-lopstr16/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:52:54,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:52:54,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:52:54,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:52:54,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:52:54,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:52:54,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:52:54,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:52:54,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:52:54,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:52:54,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:52:54,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:52:54,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:52:54,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:52:54,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:52:54,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:52:54,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:52:54,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:52:54,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:52:54,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:52:54,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:52:54,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:52:54,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:52:54,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:52:54,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:52:54,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:52:54,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:52:54,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:52:54,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:52:54,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:52:54,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:52:54,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:52:54,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:52:54,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:52:54,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:52:54,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:52:54,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:52:54,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:52:54,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:52:54,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:52:54,347 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:52:54,347 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:52:54,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:52:54,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:52:54,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:52:54,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:52:54,528 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:52:54,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2022-01-31 10:52:54,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ed87ded/b687182950894d7283d246cf0dafcfd8/FLAG591cd564a [2022-01-31 10:52:54,912 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:52:54,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2022-01-31 10:52:54,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ed87ded/b687182950894d7283d246cf0dafcfd8/FLAG591cd564a [2022-01-31 10:52:54,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ed87ded/b687182950894d7283d246cf0dafcfd8 [2022-01-31 10:52:54,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:52:54,932 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:52:54,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:52:54,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:52:54,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:52:54,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:52:54" (1/1) ... [2022-01-31 10:52:54,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513cc286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:52:54, skipping insertion in model container [2022-01-31 10:52:54,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:52:54" (1/1) ... [2022-01-31 10:52:54,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:52:54,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:52:55,107 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-lopstr16/sum_multi_array.i[808,821] [2022-01-31 10:52:55,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:53:05,057 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:53:05,070 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-lopstr16/sum_multi_array.i[808,821] [2022-01-31 10:53:05,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:53:05,109 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:53:05,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05 WrapperNode [2022-01-31 10:53:05,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:53:05,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:53:05,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:53:05,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:53:05,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:53:05,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:53:05,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:53:05,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:53:05,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:53:05,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:53:05,253 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 10:53:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:53:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:53:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:53:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:53:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:53:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:53:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:53:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 10:53:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 10:53:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:53:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:53:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:53:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:53:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:53:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:53:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:53:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:53:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:53:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:53:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:53:05,284 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 10:53:05,398 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:53:05,399 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:53:05,548 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:53:05,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:53:05,552 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 10:53:05,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:53:05 BoogieIcfgContainer [2022-01-31 10:53:05,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:53:05,554 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:53:05,554 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:53:05,555 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:53:05,571 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:53:05" (1/1) ... [2022-01-31 10:53:05,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:53:05 BasicIcfg [2022-01-31 10:53:05,585 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:53:05,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:53:05,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:53:05,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:53:05,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:52:54" (1/4) ... [2022-01-31 10:53:05,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af9c040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:53:05, skipping insertion in model container [2022-01-31 10:53:05,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:05" (2/4) ... [2022-01-31 10:53:05,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af9c040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:53:05, skipping insertion in model container [2022-01-31 10:53:05,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:53:05" (3/4) ... [2022-01-31 10:53:05,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af9c040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:53:05, skipping insertion in model container [2022-01-31 10:53:05,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:53:05" (4/4) ... [2022-01-31 10:53:05,606 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_multi_array.iJordan [2022-01-31 10:53:05,610 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:53:05,611 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:53:05,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:53:05,681 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 10:53:05,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:53:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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 10:53:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 10:53:05,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:53:05,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:53:05,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:53:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:53:05,724 INFO L85 PathProgramCache]: Analyzing trace with hash -839270659, now seen corresponding path program 1 times [2022-01-31 10:53:05,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:53:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054008232] [2022-01-31 10:53:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:05,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:53:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:53:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:05,990 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 10:53:05,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:53:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054008232] [2022-01-31 10:53:05,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054008232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:53:05,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:53:05,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:53:05,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235980833] [2022-01-31 10:53:05,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:53:05,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:53:05,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:53:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:53:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:53:06,021 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 10:53:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:53:06,210 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-01-31 10:53:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:53:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-01-31 10:53:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:53:06,217 INFO L225 Difference]: With dead ends: 38 [2022-01-31 10:53:06,217 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 10:53:06,218 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 10:53:06,232 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:53:06,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:53:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 10:53:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2022-01-31 10:53:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:53:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 10:53:06,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 10:53:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:53:06,273 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 10:53:06,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 10:53:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 10:53:06,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 10:53:06,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:53:06,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:53:06,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:53:06,274 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:53:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:53:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1759221441, now seen corresponding path program 1 times [2022-01-31 10:53:06,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:53:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198778180] [2022-01-31 10:53:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:06,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:53:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:53:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:06,421 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 10:53:06,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:53:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198778180] [2022-01-31 10:53:06,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198778180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:53:06,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:53:06,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:53:06,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322800289] [2022-01-31 10:53:06,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:53:06,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:53:06,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:53:06,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:53:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:53:06,424 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:53:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:53:06,538 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-31 10:53:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 10:53:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 10:53:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:53:06,539 INFO L225 Difference]: With dead ends: 30 [2022-01-31 10:53:06,539 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 10:53:06,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:53:06,540 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:53:06,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:53:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 10:53:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-01-31 10:53:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:53:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 10:53:06,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2022-01-31 10:53:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:53:06,544 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 10:53:06,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:53:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 10:53:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 10:53:06,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:53:06,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:53:06,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:53:06,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:53:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:53:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash 852859995, now seen corresponding path program 1 times [2022-01-31 10:53:06,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:53:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102939872] [2022-01-31 10:53:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:06,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:53:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:53:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:53:06,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:53:06,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102939872] [2022-01-31 10:53:06,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102939872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:53:06,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981043254] [2022-01-31 10:53:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:06,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:53:06,689 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 10:53:06,690 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 10:53:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 10:53:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:53:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:53:06,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:53:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:53:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981043254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:53:06,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:53:06,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-31 10:53:06,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433733535] [2022-01-31 10:53:06,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:53:06,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 10:53:06,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:53:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 10:53:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 10:53:06,889 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:53:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:53:07,048 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-01-31 10:53:07,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:53:07,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-31 10:53:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:53:07,051 INFO L225 Difference]: With dead ends: 49 [2022-01-31 10:53:07,051 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 10:53:07,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:53:07,054 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:53:07,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 27 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:53:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 10:53:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2022-01-31 10:53:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:53:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 10:53:07,060 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2022-01-31 10:53:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:53:07,063 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 10:53:07,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:53:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 10:53:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 10:53:07,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:53:07,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:53:07,093 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 10:53:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:07,265 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:53:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:53:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1317253551, now seen corresponding path program 2 times [2022-01-31 10:53:07,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:53:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586478665] [2022-01-31 10:53:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:07,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:53:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:07,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:53:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:53:07,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:53:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586478665] [2022-01-31 10:53:07,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586478665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:53:07,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060255743] [2022-01-31 10:53:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:53:07,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:53:07,468 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 10:53:07,499 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 10:53:07,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:53:07,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:53:07,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:53:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:53:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:53:07,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:53:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:53:07,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060255743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:53:07,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:53:07,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-01-31 10:53:07,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707020310] [2022-01-31 10:53:07,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:53:07,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 10:53:07,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:53:07,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 10:53:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:53:07,793 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:53:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:53:08,165 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-01-31 10:53:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 10:53:08,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-01-31 10:53:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:53:08,168 INFO L225 Difference]: With dead ends: 97 [2022-01-31 10:53:08,168 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 10:53:08,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=421, Unknown=0, NotChecked=0, Total=650 [2022-01-31 10:53:08,169 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:53:08,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 50 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:53:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 10:53:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2022-01-31 10:53:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:53:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 10:53:08,174 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 31 [2022-01-31 10:53:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:53:08,174 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 10:53:08,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:53:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 10:53:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 10:53:08,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:53:08,175 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:53:08,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 10:53:08,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 10:53:08,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:53:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:53:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1386673577, now seen corresponding path program 3 times [2022-01-31 10:53:08,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:53:08,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21844768] [2022-01-31 10:53:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:08,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:53:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:08,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:53:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:53:08,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:53:08,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21844768] [2022-01-31 10:53:08,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21844768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:53:08,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330183949] [2022-01-31 10:53:08,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:53:08,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:53:08,593 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 10:53:08,623 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 10:53:10,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 10:53:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:53:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 10:53:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:53:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:53:10,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:53:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 10:53:11,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330183949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:53:11,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:53:11,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 10:53:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108786328] [2022-01-31 10:53:11,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:53:11,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 10:53:11,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:53:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 10:53:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 10:53:11,132 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 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 10:53:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:53:11,468 INFO L93 Difference]: Finished difference Result 193 states and 216 transitions. [2022-01-31 10:53:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 10:53:11,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 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 55 [2022-01-31 10:53:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:53:11,471 INFO L225 Difference]: With dead ends: 193 [2022-01-31 10:53:11,471 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 10:53:11,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:53:11,472 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 201 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:53:11,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 87 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:53:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 10:53:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 108. [2022-01-31 10:53:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:53:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-01-31 10:53:11,495 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 55 [2022-01-31 10:53:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:53:11,495 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-01-31 10:53:11,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 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 10:53:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-01-31 10:53:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 10:53:11,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:53:11,497 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:53:11,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:53:11,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:11,712 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:53:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:53:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1079217241, now seen corresponding path program 4 times [2022-01-31 10:53:11,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:53:11,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729245600] [2022-01-31 10:53:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:11,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:53:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:12,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:53:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 10:53:12,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:53:12,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729245600] [2022-01-31 10:53:12,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729245600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:53:12,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485430428] [2022-01-31 10:53:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:53:12,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:53:12,070 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 10:53:12,091 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 10:53:12,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:53:12,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:53:12,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 10:53:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:53:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 10:53:12,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:53:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 10:53:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485430428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:53:13,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:53:13,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 10:53:13,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578206269] [2022-01-31 10:53:13,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:53:13,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 10:53:13,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:53:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 10:53:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 10:53:13,085 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 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 10:53:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:53:13,767 INFO L93 Difference]: Finished difference Result 385 states and 432 transitions. [2022-01-31 10:53:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 10:53:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 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 103 [2022-01-31 10:53:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:53:13,769 INFO L225 Difference]: With dead ends: 385 [2022-01-31 10:53:13,770 INFO L226 Difference]: Without dead ends: 385 [2022-01-31 10:53:13,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 10:53:13,771 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 483 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:53:13,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 129 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:53:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-31 10:53:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 204. [2022-01-31 10:53:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:53:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2022-01-31 10:53:13,779 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 103 [2022-01-31 10:53:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:53:13,779 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2022-01-31 10:53:13,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 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 10:53:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2022-01-31 10:53:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 10:53:13,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:53:13,781 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:53:13,799 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 10:53:13,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:13,991 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:53:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:53:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash 85337671, now seen corresponding path program 5 times [2022-01-31 10:53:13,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:53:13,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185361189] [2022-01-31 10:53:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:53:13,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:53:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:15,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:53:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:53:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-31 10:53:15,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:53:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185361189] [2022-01-31 10:53:15,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185361189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:53:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115110241] [2022-01-31 10:53:15,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:53:15,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:53:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:53:15,308 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 10:53:15,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process