/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:05:55,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:05:55,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:05:55,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:05:55,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:05:55,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:05:55,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:05:55,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:05:55,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:05:55,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:05:55,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:05:55,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:05:55,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:05:55,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:05:55,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:05:55,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:05:55,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:05:55,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:05:55,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:05:55,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:05:55,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:05:55,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:05:55,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:05:55,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:05:55,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:05:55,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 09:05:55,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 09:05:55,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 09:05:55,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 09:05:55,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 09:05:55,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 09:05:55,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 09:05:55,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 09:05:55,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:05:55,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:05:55,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:05:55,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:05:55,508 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:05:55,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:05:55,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:05:55,509 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:05:55,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:05:55,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:05:55,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:05:55,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:05:55,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:05:55,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:05:55,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:05:55,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:05:55,511 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:05:55,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:05:55,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:05:55,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:05:55,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:05:55,699 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:05:55,701 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:05:55,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rew.c [2022-01-31 09:05:55,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f137064/ba2f1d363dd34c1aae9c1b1147db117b/FLAG6008be93a [2022-01-31 09:05:56,094 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:05:56,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c [2022-01-31 09:05:56,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f137064/ba2f1d363dd34c1aae9c1b1147db117b/FLAG6008be93a [2022-01-31 09:05:56,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f137064/ba2f1d363dd34c1aae9c1b1147db117b [2022-01-31 09:05:56,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:05:56,117 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:05:56,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:05:56,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:05:56,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:05:56,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fdac20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56, skipping insertion in model container [2022-01-31 09:05:56,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:05:56,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:05:56,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c[394,407] [2022-01-31 09:05:56,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:05:56,292 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:05:56,300 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c[394,407] [2022-01-31 09:05:56,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:05:56,311 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:05:56,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56 WrapperNode [2022-01-31 09:05:56,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:05:56,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:05:56,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:05:56,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:05:56,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:05:56,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:05:56,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:05:56,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:05:56,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:05:56,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:56,362 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 09:05:56,371 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 09:05:56,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:05:56,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:05:56,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:05:56,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:05:56,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:05:56,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:05:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:05:56,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:05:56,392 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:05:56,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:05:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:05:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:05:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:05:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 09:05:56,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:05:56,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 09:05:56,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:05:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:05:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:05:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:05:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:05:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:05:56,464 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:05:56,465 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:05:56,598 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:05:56,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:05:56,601 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:05:56,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:05:56 BoogieIcfgContainer [2022-01-31 09:05:56,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:05:56,603 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:05:56,603 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:05:56,604 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:05:56,606 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:05:56" (1/1) ... [2022-01-31 09:05:56,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:05:56 BasicIcfg [2022-01-31 09:05:56,616 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:05:56,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:05:56,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:05:56,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:05:56,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:05:56" (1/4) ... [2022-01-31 09:05:56,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ac1d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:05:56, skipping insertion in model container [2022-01-31 09:05:56,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:05:56" (2/4) ... [2022-01-31 09:05:56,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ac1d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:05:56, skipping insertion in model container [2022-01-31 09:05:56,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:05:56" (3/4) ... [2022-01-31 09:05:56,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ac1d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:05:56, skipping insertion in model container [2022-01-31 09:05:56,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:05:56" (4/4) ... [2022-01-31 09:05:56,621 INFO L111 eAbstractionObserver]: Analyzing ICFG rew.cJordan [2022-01-31 09:05:56,624 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:05:56,624 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:05:56,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:05:56,656 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 09:05:56,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:05:56,664 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 09:05:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:05:56,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:56,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:56,670 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:56,677 INFO L85 PathProgramCache]: Analyzing trace with hash -901762068, now seen corresponding path program 1 times [2022-01-31 09:05:56,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:56,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662794806] [2022-01-31 09:05:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:56,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:56,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:56,873 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 09:05:56,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662794806] [2022-01-31 09:05:56,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662794806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:56,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:56,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:05:56,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875324849] [2022-01-31 09:05:56,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:56,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:05:56,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:05:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:05:56,903 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 09:05:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:56,953 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 09:05:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:05:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2022-01-31 09:05:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:56,961 INFO L225 Difference]: With dead ends: 27 [2022-01-31 09:05:56,961 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 09:05:56,962 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 09:05:56,966 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:56,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:05:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 09:05:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 09:05:56,990 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 09:05:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 09:05:56,992 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2022-01-31 09:05:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:56,993 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 09:05:56,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 09:05:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 09:05:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:05:56,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:56,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:56,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:05:56,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash -14258387, now seen corresponding path program 1 times [2022-01-31 09:05:56,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:56,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320454494] [2022-01-31 09:05:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:56,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:57,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:57,098 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 09:05:57,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:57,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320454494] [2022-01-31 09:05:57,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320454494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:05:57,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:05:57,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:05:57,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905641123] [2022-01-31 09:05:57,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:05:57,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:05:57,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:57,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:05:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:05:57,102 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 09:05:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:57,151 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 09:05:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:05:57,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-01-31 09:05:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:57,153 INFO L225 Difference]: With dead ends: 26 [2022-01-31 09:05:57,153 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 09:05:57,156 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 09:05:57,157 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:57,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:05:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 09:05:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-31 09:05:57,166 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 09:05:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 09:05:57,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-01-31 09:05:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:57,168 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 09:05:57,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 09:05:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 09:05:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 09:05:57,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:57,176 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 09:05:57,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:05:57,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1525851288, now seen corresponding path program 1 times [2022-01-31 09:05:57,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:57,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711782189] [2022-01-31 09:05:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:57,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:57,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:05:57,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:57,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711782189] [2022-01-31 09:05:57,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711782189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:57,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042246097] [2022-01-31 09:05:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:57,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:57,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:57,284 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 09:05:57,285 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 09:05:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:05:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:05:57,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:05:57,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042246097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:57,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:57,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 09:05:57,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289610587] [2022-01-31 09:05:57,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:57,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 09:05:57,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 09:05:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 09:05:57,469 INFO L87 Difference]: Start difference. First operand 24 states and 26 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 09:05:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:57,529 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-01-31 09:05:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:05:57,529 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 18 [2022-01-31 09:05:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:57,530 INFO L225 Difference]: With dead ends: 35 [2022-01-31 09:05:57,530 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 09:05:57,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:05:57,531 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:57,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:05:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 09:05:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2022-01-31 09:05:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 09:05:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-31 09:05:57,534 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2022-01-31 09:05:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:57,534 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-31 09:05:57,534 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 09:05:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-31 09:05:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:05:57,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:57,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:57,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 09:05:57,757 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 09:05:57,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash -584637630, now seen corresponding path program 1 times [2022-01-31 09:05:57,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:57,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360396604] [2022-01-31 09:05:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:57,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:57,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:05:57,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:57,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360396604] [2022-01-31 09:05:57,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360396604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:57,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137786559] [2022-01-31 09:05:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:57,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:57,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:57,969 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 09:05:57,997 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 09:05:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 09:05:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:58,095 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 09:05:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:05:58,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:05:58,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:05:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:05:58,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:00,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_22 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_22)) (forall ((v_ArrVal_36 Int)) (<= c_main_~low~0 (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_22 4)) v_ArrVal_36) c_main_~a~0.offset))))) is different from false [2022-01-31 09:06:00,406 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 21 treesize of output 19 [2022-01-31 09:06:00,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 150 [2022-01-31 09:06:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-31 09:06:00,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137786559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:00,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:00,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 24 [2022-01-31 09:06:00,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209699634] [2022-01-31 09:06:00,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:00,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:06:00,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:06:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2022-01-31 09:06:00,503 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:06:02,536 WARN L838 $PredicateComparison]: unable to prove that (and (= c_main_~val2~0 3) (= 3 (select (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset))) (forall ((v_main_~i~0_22 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_22)) (forall ((v_ArrVal_36 Int)) (<= c_main_~low~0 (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* v_main_~i~0_22 4)) v_ArrVal_36) c_main_~a~0.offset))))) (= (+ (- 2) c_main_~low~0) 0) (= c_main_~i~0 0) (= c_main_~a~0.offset 0)) is different from false [2022-01-31 09:06:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:02,712 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-01-31 09:06:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 09:06:02,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 09:06:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:02,714 INFO L225 Difference]: With dead ends: 52 [2022-01-31 09:06:02,714 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 09:06:02,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=114, Invalid=648, Unknown=2, NotChecked=106, Total=870 [2022-01-31 09:06:02,716 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:02,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 106 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 221 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-01-31 09:06:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 09:06:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-01-31 09:06:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:06:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 09:06:02,721 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 22 [2022-01-31 09:06:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:02,721 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 09:06:02,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:06:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 09:06:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:06:02,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:02,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:02,741 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 09:06:02,935 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 09:06:02,935 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2133304445, now seen corresponding path program 2 times [2022-01-31 09:06:02,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:02,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904848044] [2022-01-31 09:06:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:02,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:03,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:06:03,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:03,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904848044] [2022-01-31 09:06:03,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904848044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:03,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098118166] [2022-01-31 09:06:03,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:06:03,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:03,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:03,207 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 09:06:03,275 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 09:06:03,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:06:03,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:06:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 09:06:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:03,378 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 09:06:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:06:03,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-31 09:06:03,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:06:03,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:06:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:06:03,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:06:03,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:06:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:06:03,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:32,930 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_28 Int) (v_ArrVal_68 Int) (v_ArrVal_64 Int) (v_ArrVal_65 Int)) (or (<= c_main_~low~0 (select (store (let ((.cse0 (* c_main_~i~0 4))) (store (store (select |c_#memory_int| c_main_~a~0.base) (+ .cse0 c_main_~a~0.offset 4) v_ArrVal_64) (+ .cse0 c_main_~a~0.offset) v_ArrVal_65)) (+ (* v_main_~i~0_28 4) c_main_~a~0.offset) v_ArrVal_68) c_main_~a~0.offset)) (<= v_main_~i~0_28 c_main_~i~0))) is different from false [2022-01-31 09:06:47,059 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 36 treesize of output 34 [2022-01-31 09:06:47,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 662 treesize of output 658 [2022-01-31 09:06:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-01-31 09:06:47,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098118166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:47,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:47,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 31 [2022-01-31 09:06:47,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252736925] [2022-01-31 09:06:47,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:47,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 09:06:47,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 09:06:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=741, Unknown=17, NotChecked=56, Total=930 [2022-01-31 09:06:47,396 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:06:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:51,935 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-01-31 09:06:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:06:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 09:06:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:51,938 INFO L225 Difference]: With dead ends: 56 [2022-01-31 09:06:51,938 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 09:06:51,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=199, Invalid=1194, Unknown=17, NotChecked=72, Total=1482 [2022-01-31 09:06:51,939 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:51,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 175 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 432 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-01-31 09:06:51,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 09:06:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2022-01-31 09:06:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:06:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-31 09:06:51,943 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2022-01-31 09:06:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:51,943 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-31 09:06:51,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:06:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-31 09:06:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 09:06:51,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:51,944 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, 1, 1] [2022-01-31 09:06:51,962 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 09:06:52,144 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 09:06:52,145 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:52,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash -646586056, now seen corresponding path program 1 times [2022-01-31 09:06:52,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:52,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14982499] [2022-01-31 09:06:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:52,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:52,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:52,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 09:06:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:06:52,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14982499] [2022-01-31 09:06:52,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14982499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:52,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470468861] [2022-01-31 09:06:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:52,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:52,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:52,365 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 09:06:52,396 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 09:06:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 09:06:52,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:52,536 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 13 treesize of output 9 [2022-01-31 09:06:52,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:06:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:06:52,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:52,779 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 16 treesize of output 14 [2022-01-31 09:06:52,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-31 09:06:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:06:52,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470468861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:52,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:52,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-01-31 09:06:52,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676372756] [2022-01-31 09:06:52,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:52,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:06:52,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:06:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:06:52,838 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 26 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:06:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:53,060 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-01-31 09:06:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:06:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-01-31 09:06:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:53,061 INFO L225 Difference]: With dead ends: 66 [2022-01-31 09:06:53,061 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 09:06:53,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-31 09:06:53,062 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:53,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 181 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 414 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-01-31 09:06:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 09:06:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-01-31 09:06:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:06:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 09:06:53,066 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2022-01-31 09:06:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:53,066 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 09:06:53,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:06:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 09:06:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 09:06:53,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:53,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:53,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 09:06:53,283 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 09:06:53,284 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash 590018419, now seen corresponding path program 2 times [2022-01-31 09:06:53,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:53,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468210763] [2022-01-31 09:06:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:53,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:53,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 09:06:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:06:53,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468210763] [2022-01-31 09:06:53,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468210763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182195245] [2022-01-31 09:06:53,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:06:53,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:53,526 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 09:06:53,528 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 09:06:53,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:06:53,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:06:53,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:06:53,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:53,696 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 09:06:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:06:53,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:06:53,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:06:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:06:53,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:04,603 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 23 treesize of output 21 [2022-01-31 09:07:04,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-01-31 09:07:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:07:04,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182195245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:04,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:04,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-31 09:07:04,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583912969] [2022-01-31 09:07:04,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:04,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:07:04,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:04,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:07:04,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=755, Unknown=5, NotChecked=0, Total=870 [2022-01-31 09:07:04,760 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:07:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:05,070 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-01-31 09:07:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 09:07:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-01-31 09:07:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:05,071 INFO L225 Difference]: With dead ends: 67 [2022-01-31 09:07:05,071 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 09:07:05,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=174, Invalid=1227, Unknown=5, NotChecked=0, Total=1406 [2022-01-31 09:07:05,072 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:05,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 155 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 473 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-01-31 09:07:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 09:07:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2022-01-31 09:07:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:07:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-31 09:07:05,075 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2022-01-31 09:07:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:05,075 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-31 09:07:05,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:07:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-31 09:07:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 09:07:05,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:05,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:05,095 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 09:07:05,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:05,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:05,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1485158098, now seen corresponding path program 3 times [2022-01-31 09:07:05,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445273222] [2022-01-31 09:07:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:05,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:05,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:05,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 09:07:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:05,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:07:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:05,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445273222] [2022-01-31 09:07:05,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445273222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271089953] [2022-01-31 09:07:05,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:07:05,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:05,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:05,370 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 09:07:05,392 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 09:07:05,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 09:07:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:07:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:07:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:05,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:05,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271089953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:05,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:05,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-31 09:07:05,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727060304] [2022-01-31 09:07:05,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:05,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:07:05,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:05,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:07:05,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:07:05,597 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:07:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:05,716 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-01-31 09:07:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 09:07:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2022-01-31 09:07:05,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:05,717 INFO L225 Difference]: With dead ends: 70 [2022-01-31 09:07:05,717 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 09:07:05,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-01-31 09:07:05,718 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:05,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:07:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 09:07:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-01-31 09:07:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:07:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-01-31 09:07:05,721 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2022-01-31 09:07:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:05,721 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-01-31 09:07:05,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:07:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-01-31 09:07:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 09:07:05,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:05,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:05,738 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 09:07:05,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:05,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2038363241, now seen corresponding path program 4 times [2022-01-31 09:07:05,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:05,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548755544] [2022-01-31 09:07:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:05,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:06,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:06,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 09:07:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:06,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:07:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:06,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:06,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548755544] [2022-01-31 09:07:06,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548755544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759868735] [2022-01-31 09:07:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:07:06,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:06,156 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 09:07:06,156 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 09:07:06,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:07:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:07:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 09:07:06,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:06,332 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 13 treesize of output 9 [2022-01-31 09:07:14,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:07:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:14,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:16,770 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 16 treesize of output 14 [2022-01-31 09:07:16,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-31 09:07:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:16,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759868735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:16,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:16,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 33 [2022-01-31 09:07:16,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200761408] [2022-01-31 09:07:16,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:16,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 09:07:16,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:16,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 09:07:16,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=944, Unknown=3, NotChecked=0, Total=1056 [2022-01-31 09:07:16,926 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 33 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:07:21,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:21,282 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-01-31 09:07:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:07:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 42 [2022-01-31 09:07:21,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:21,283 INFO L225 Difference]: With dead ends: 86 [2022-01-31 09:07:21,283 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 09:07:21,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=175, Invalid=1460, Unknown=5, NotChecked=0, Total=1640 [2022-01-31 09:07:21,284 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:21,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 205 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 449 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-01-31 09:07:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 09:07:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-01-31 09:07:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:07:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-01-31 09:07:21,289 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 42 [2022-01-31 09:07:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:21,289 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-01-31 09:07:21,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:07:21,289 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-01-31 09:07:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 09:07:21,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:21,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:21,305 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 09:07:21,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:21,499 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 376801828, now seen corresponding path program 5 times [2022-01-31 09:07:21,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889917027] [2022-01-31 09:07:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:21,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:21,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:07:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:21,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:07:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:21,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889917027] [2022-01-31 09:07:21,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889917027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813798913] [2022-01-31 09:07:21,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:07:21,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:21,720 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 09:07:21,731 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 09:07:21,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 09:07:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:07:21,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 09:07:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:21,920 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 09:07:21,991 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:07:21,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:07:30,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:07:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:30,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:53,474 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 23 treesize of output 21 [2022-01-31 09:07:53,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-01-31 09:07:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:53,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813798913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:53,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:53,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-01-31 09:07:53,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231803683] [2022-01-31 09:07:53,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:53,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 09:07:53,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 09:07:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1185, Unknown=12, NotChecked=0, Total=1332 [2022-01-31 09:07:53,617 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 37 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:07:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:58,347 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-01-31 09:07:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 09:07:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 46 [2022-01-31 09:07:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:58,348 INFO L225 Difference]: With dead ends: 103 [2022-01-31 09:07:58,348 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 09:07:58,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=220, Invalid=1927, Unknown=15, NotChecked=0, Total=2162 [2022-01-31 09:07:58,349 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:58,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 165 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 241 Unchecked, 0.1s Time] [2022-01-31 09:07:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 09:07:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2022-01-31 09:07:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.0625) internal successors, (68), 66 states have internal predecessors, (68), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:07:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-01-31 09:07:58,353 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 46 [2022-01-31 09:07:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:58,353 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-01-31 09:07:58,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:07:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-01-31 09:07:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 09:07:58,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:58,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:58,372 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 09:07:58,567 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,SelfDestructingSolverStorable9 [2022-01-31 09:07:58,567 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1546020001, now seen corresponding path program 6 times [2022-01-31 09:07:58,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:58,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140896293] [2022-01-31 09:07:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:58,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:58,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:58,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 09:07:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:58,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:07:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:58,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:07:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:07:58,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:58,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140896293] [2022-01-31 09:07:58,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140896293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:58,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285180094] [2022-01-31 09:07:58,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:07:58,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:58,684 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 09:07:58,684 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 09:07:58,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 09:07:58,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:07:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 09:07:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:07:58,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:07:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285180094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:58,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:58,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2022-01-31 09:07:58,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007288894] [2022-01-31 09:07:58,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:58,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 09:07:58,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:58,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 09:07:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-31 09:07:58,957 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:07:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:59,136 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-01-31 09:07:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 09:07:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-01-31 09:07:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:59,136 INFO L225 Difference]: With dead ends: 106 [2022-01-31 09:07:59,137 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 09:07:59,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-01-31 09:07:59,137 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:59,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 75 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:07:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 09:07:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2022-01-31 09:07:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:07:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-01-31 09:07:59,141 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 50 [2022-01-31 09:07:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:59,141 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-01-31 09:07:59,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:07:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-01-31 09:07:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 09:07:59,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:59,141 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:59,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 09:07:59,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:59,342 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:59,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2040214945, now seen corresponding path program 7 times [2022-01-31 09:07:59,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:59,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122468861] [2022-01-31 09:07:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:59,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:59,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:59,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:07:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:59,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:07:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:07:59,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:59,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122468861] [2022-01-31 09:07:59,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122468861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:59,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245660911] [2022-01-31 09:07:59,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:07:59,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:59,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:59,577 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 09:07:59,591 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 09:07:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 09:07:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:59,745 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 09:07:59,803 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:59,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:07:59,818 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:07:59,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:07:59,880 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:07:59,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:08:08,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:08:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:08:08,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:08:50,387 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_104 Int)) (or (forall ((v_main_~i~0_103 Int) (v_ArrVal_263 Int) (v_ArrVal_261 Int)) (or (not (<= (+ v_main_~i~0_104 1) v_main_~i~0_103)) (<= c_main_~low~0 (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 4 v_main_~i~0_104)) v_ArrVal_261) (+ c_main_~a~0.offset (* 4 v_main_~i~0_103)) v_ArrVal_263) (+ c_main_~a~0.offset 8))))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_104)))) is different from false [2022-01-31 09:08:50,400 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 30 treesize of output 28 [2022-01-31 09:08:50,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 386 treesize of output 378 [2022-01-31 09:08:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2022-01-31 09:08:50,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245660911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:08:50,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:08:50,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-01-31 09:08:50,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489597918] [2022-01-31 09:08:50,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:08:50,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 09:08:50,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:08:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 09:08:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1383, Unknown=18, NotChecked=76, Total=1640 [2022-01-31 09:08:50,740 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 41 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:08:56,898 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_main_~i~0 4) c_main_~a~0.offset))) (and (= c_main_~val2~0 3) (forall ((v_main_~i~0_104 Int)) (or (forall ((v_main_~i~0_103 Int) (v_ArrVal_263 Int) (v_ArrVal_261 Int)) (or (not (<= (+ v_main_~i~0_104 1) v_main_~i~0_103)) (<= c_main_~low~0 (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 4 v_main_~i~0_104)) v_ArrVal_261) (+ c_main_~a~0.offset (* 4 v_main_~i~0_103)) v_ArrVal_263) (+ c_main_~a~0.offset 8))))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_104)))) (= 3 (select (select |c_#memory_int| c_main_~a~0.base) .cse0)) (= (+ (- 2) c_main_~low~0) 0) (= .cse0 (+ c_main_~a~0.offset 8)))) is different from false [2022-01-31 09:08:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:08:59,617 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-01-31 09:08:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 09:08:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-01-31 09:08:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:08:59,618 INFO L225 Difference]: With dead ends: 85 [2022-01-31 09:08:59,618 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 09:08:59,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=242, Invalid=2095, Unknown=23, NotChecked=190, Total=2550 [2022-01-31 09:08:59,619 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:08:59,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 191 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 610 Invalid, 0 Unknown, 182 Unchecked, 0.3s Time] [2022-01-31 09:08:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 09:08:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2022-01-31 09:08:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.05) internal successors, (63), 62 states have internal predecessors, (63), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:08:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-01-31 09:08:59,623 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 50 [2022-01-31 09:08:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:08:59,623 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-01-31 09:08:59,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.763157894736842) internal successors, (105), 38 states have internal predecessors, (105), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:08:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-01-31 09:08:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 09:08:59,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:08:59,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:08:59,642 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 09:08:59,827 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,SelfDestructingSolverStorable11 [2022-01-31 09:08:59,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:08:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:08:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash 224937498, now seen corresponding path program 8 times [2022-01-31 09:08:59,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:08:59,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240449240] [2022-01-31 09:08:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:08:59,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:08:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:00,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:00,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:09:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:00,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:09:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:00,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:09:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:00,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240449240] [2022-01-31 09:09:00,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240449240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542013445] [2022-01-31 09:09:00,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:09:00,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:00,169 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 09:09:00,169 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 09:09:00,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:09:00,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:09:00,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:00,361 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 13 treesize of output 9 [2022-01-31 09:09:00,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:09:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:00,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:02,896 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 16 treesize of output 14 [2022-01-31 09:09:02,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-31 09:09:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:03,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542013445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:03,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:03,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 38 [2022-01-31 09:09:03,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317493139] [2022-01-31 09:09:03,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:03,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 09:09:03,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 09:09:03,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1270, Unknown=1, NotChecked=0, Total=1406 [2022-01-31 09:09:03,060 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 38 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 states have internal predecessors, (102), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:09:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:03,479 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-01-31 09:09:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 09:09:03,480 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 states have internal predecessors, (102), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 54 [2022-01-31 09:09:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:03,481 INFO L225 Difference]: With dead ends: 106 [2022-01-31 09:09:03,481 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 09:09:03,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=199, Invalid=1962, Unknown=1, NotChecked=0, Total=2162 [2022-01-31 09:09:03,481 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 79 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:03,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 227 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 563 Invalid, 0 Unknown, 267 Unchecked, 0.2s Time] [2022-01-31 09:09:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 09:09:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2022-01-31 09:09:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:09:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-01-31 09:09:03,484 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 54 [2022-01-31 09:09:03,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:03,485 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-01-31 09:09:03,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 states have internal predecessors, (102), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:09:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-01-31 09:09:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 09:09:03,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:03,485 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:03,501 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 09:09:03,695 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,SelfDestructingSolverStorable12 [2022-01-31 09:09:03,695 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1708989269, now seen corresponding path program 9 times [2022-01-31 09:09:03,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068816752] [2022-01-31 09:09:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:03,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:03,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:09:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:03,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:09:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:03,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:09:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:03,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068816752] [2022-01-31 09:09:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068816752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627157107] [2022-01-31 09:09:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:09:03,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:03,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:03,977 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 09:09:03,981 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 09:09:04,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 09:09:04,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:09:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:04,144 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 13 treesize of output 9 [2022-01-31 09:09:04,189 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:09:04,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:09:10,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:09:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:10,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:15,379 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 23 treesize of output 21 [2022-01-31 09:09:15,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-01-31 09:09:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:15,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627157107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:15,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:15,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 42 [2022-01-31 09:09:15,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178406065] [2022-01-31 09:09:15,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:15,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 09:09:15,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 09:09:15,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1560, Unknown=5, NotChecked=0, Total=1722 [2022-01-31 09:09:15,564 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 42 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:09:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:16,091 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2022-01-31 09:09:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:09:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 58 [2022-01-31 09:09:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:16,092 INFO L225 Difference]: With dead ends: 131 [2022-01-31 09:09:16,092 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 09:09:16,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=267, Invalid=2590, Unknown=5, NotChecked=0, Total=2862 [2022-01-31 09:09:16,094 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:16,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 258 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 720 Invalid, 0 Unknown, 310 Unchecked, 0.3s Time] [2022-01-31 09:09:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 09:09:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2022-01-31 09:09:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 84 states have internal predecessors, (85), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:09:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2022-01-31 09:09:16,099 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 58 [2022-01-31 09:09:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:16,099 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2022-01-31 09:09:16,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.923076923076923) internal successors, (114), 39 states have internal predecessors, (114), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:09:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2022-01-31 09:09:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 09:09:16,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:16,100 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:16,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 09:09:16,315 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,SelfDestructingSolverStorable13 [2022-01-31 09:09:16,316 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1764928528, now seen corresponding path program 10 times [2022-01-31 09:09:16,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:16,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700055800] [2022-01-31 09:09:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:16,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:16,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:16,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 09:09:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:09:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:09:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:16,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:09:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:09:16,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:16,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700055800] [2022-01-31 09:09:16,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700055800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:16,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936378922] [2022-01-31 09:09:16,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:09:16,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:16,436 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 09:09:16,437 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 09:09:16,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:09:16,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:16,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 09:09:16,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:09:16,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:09:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:09:16,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936378922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:09:16,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:09:16,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2022-01-31 09:09:16,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412638018] [2022-01-31 09:09:16,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:09:16,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:09:16,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:09:16,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:09:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:09:16,855 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:09:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:09:17,087 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2022-01-31 09:09:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 09:09:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 62 [2022-01-31 09:09:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:09:17,088 INFO L225 Difference]: With dead ends: 134 [2022-01-31 09:09:17,088 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 09:09:17,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:09:17,089 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:09:17,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 76 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:09:17,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 09:09:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2022-01-31 09:09:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:09:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-01-31 09:09:17,092 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 62 [2022-01-31 09:09:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:09:17,092 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-01-31 09:09:17,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:09:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-01-31 09:09:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 09:09:17,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:09:17,092 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:09:17,116 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 09:09:17,307 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,SelfDestructingSolverStorable14 [2022-01-31 09:09:17,307 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:09:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:09:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 555670288, now seen corresponding path program 11 times [2022-01-31 09:09:17,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:09:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673748376] [2022-01-31 09:09:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:09:17,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:09:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:17,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:09:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:17,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:09:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:17,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:09:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:17,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:09:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:09:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:17,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:09:17,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673748376] [2022-01-31 09:09:17,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673748376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:09:17,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261839457] [2022-01-31 09:09:17,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:09:17,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:09:17,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:09:17,655 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 09:09:17,677 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 09:09:17,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 09:09:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:09:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 09:09:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:09:17,918 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 09:09:17,976 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:09:17,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:09:17,987 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:09:17,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:09:18,022 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:09:18,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:09:24,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:09:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:09:24,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:06,657 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 39 treesize of output 37 [2022-01-31 09:10:06,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53590 treesize of output 53078 [2022-01-31 09:14:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:14:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261839457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:14:55,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:14:55,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 19] total 48 [2022-01-31 09:14:55,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196219014] [2022-01-31 09:14:55,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:14:55,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 09:14:55,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:14:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 09:14:55,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2011, Unknown=20, NotChecked=0, Total=2256 [2022-01-31 09:14:55,128 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 48 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:14:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:14:55,803 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-01-31 09:14:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 09:14:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 62 [2022-01-31 09:14:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:14:55,804 INFO L225 Difference]: With dead ends: 107 [2022-01-31 09:14:55,804 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 09:14:55,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=316, Invalid=2970, Unknown=20, NotChecked=0, Total=3306 [2022-01-31 09:14:55,809 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:14:55,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 315 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1074 Invalid, 0 Unknown, 189 Unchecked, 0.4s Time] [2022-01-31 09:14:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 09:14:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2022-01-31 09:14:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 75 states have internal predecessors, (76), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:14:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-01-31 09:14:55,814 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 62 [2022-01-31 09:14:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:14:55,814 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-01-31 09:14:55,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 09:14:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-01-31 09:14:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 09:14:55,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:14:55,815 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:14:55,836 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 09:14:56,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:14:56,037 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:14:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:14:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 700978763, now seen corresponding path program 12 times [2022-01-31 09:14:56,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:14:56,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549379774] [2022-01-31 09:14:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:14:56,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:14:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:14:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:56,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 09:14:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:56,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:14:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:56,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:14:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:56,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:14:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 77 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:14:56,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:14:56,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549379774] [2022-01-31 09:14:56,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549379774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:14:56,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526176467] [2022-01-31 09:14:56,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:14:56,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:14:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:14:56,305 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 09:14:56,324 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 09:14:56,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 09:14:56,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:14:56,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 09:14:56,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:14:56,615 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 09:14:58,030 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 09:14:58,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-31 09:14:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:14:58,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:14:58,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526176467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:14:58,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:14:58,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-01-31 09:14:58,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084416660] [2022-01-31 09:14:58,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:14:58,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 09:14:58,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:14:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 09:14:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:14:58,209 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 34 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:14:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:14:58,940 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-01-31 09:14:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 09:14:58,940 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 66 [2022-01-31 09:14:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:14:58,940 INFO L225 Difference]: With dead ends: 124 [2022-01-31 09:14:58,940 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 09:14:58,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=321, Invalid=2985, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 09:14:58,942 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:14:58,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 291 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 581 Invalid, 0 Unknown, 211 Unchecked, 0.2s Time] [2022-01-31 09:14:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 09:14:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-01-31 09:14:58,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 09:14:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-01-31 09:14:58,944 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 66 [2022-01-31 09:14:58,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:14:58,944 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-01-31 09:14:58,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 09:14:58,944 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-01-31 09:14:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 09:14:58,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:14:58,944 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:14:58,967 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 09:14:59,165 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,SelfDestructingSolverStorable16 [2022-01-31 09:14:59,165 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:14:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:14:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1893198598, now seen corresponding path program 13 times [2022-01-31 09:14:59,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:14:59,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056650279] [2022-01-31 09:14:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:14:59,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:14:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:59,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:14:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:59,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:14:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:59,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:14:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:59,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:14:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:59,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 09:14:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 98 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:14:59,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:14:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056650279] [2022-01-31 09:14:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056650279] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:14:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818529154] [2022-01-31 09:14:59,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:14:59,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:14:59,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:14:59,524 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 09:14:59,586 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 09:14:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:14:59,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 09:14:59,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:14:59,834 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 09:14:59,908 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:14:59,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:15:32,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:15:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:15:32,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:15:36,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_523 Int)) (<= c_main_~low~0 (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset) v_ArrVal_523) (+ c_main_~a~0.offset 16)))) is different from false [2022-01-31 09:16:00,849 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 23 treesize of output 21 [2022-01-31 09:16:00,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-01-31 09:16:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 82 refuted. 0 times theorem prover too weak. 24 trivial. 16 not checked. [2022-01-31 09:16:01,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818529154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:16:01,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:16:01,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 49 [2022-01-31 09:16:01,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561385173] [2022-01-31 09:16:01,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:16:01,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 09:16:01,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:16:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 09:16:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2077, Unknown=14, NotChecked=92, Total=2352 [2022-01-31 09:16:01,126 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 49 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 16 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:16:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:16:10,076 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-01-31 09:16:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 09:16:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 16 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 70 [2022-01-31 09:16:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:16:10,077 INFO L225 Difference]: With dead ends: 85 [2022-01-31 09:16:10,077 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 09:16:10,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 113 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=286, Invalid=3482, Unknown=18, NotChecked=120, Total=3906 [2022-01-31 09:16:10,078 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:16:10,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 431 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1551 Invalid, 0 Unknown, 193 Unchecked, 0.5s Time] [2022-01-31 09:16:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 09:16:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-01-31 09:16:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:16:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-01-31 09:16:10,081 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 70 [2022-01-31 09:16:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:16:10,081 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-01-31 09:16:10,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 46 states have internal predecessors, (135), 16 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:16:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-01-31 09:16:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 09:16:10,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:16:10,081 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:16:10,100 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 09:16:10,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:16:10,282 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:16:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:16:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1943315708, now seen corresponding path program 14 times [2022-01-31 09:16:10,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:16:10,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054969642] [2022-01-31 09:16:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:16:10,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:16:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:16:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:16:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:16:10,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:16:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:16:10,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:16:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:16:10,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:16:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:16:10,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 09:16:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:16:10,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:16:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:16:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 116 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:16:10,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:16:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054969642] [2022-01-31 09:16:10,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054969642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:16:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109553751] [2022-01-31 09:16:10,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:16:10,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:16:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:16:10,596 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 09:16:10,597 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 09:16:10,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:16:10,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:16:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 09:16:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:16:10,905 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 13 treesize of output 9 [2022-01-31 09:16:57,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:16:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:16:57,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:17:00,161 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 16 treesize of output 14 [2022-01-31 09:17:00,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-31 09:17:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 116 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:17:00,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109553751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:17:00,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:17:00,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 51 [2022-01-31 09:17:00,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999891998] [2022-01-31 09:17:00,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:17:00,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 09:17:00,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:17:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 09:17:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2375, Unknown=6, NotChecked=0, Total=2550 [2022-01-31 09:17:00,445 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 51 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:17:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:17:11,360 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2022-01-31 09:17:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 09:17:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 78 [2022-01-31 09:17:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:17:11,361 INFO L225 Difference]: With dead ends: 146 [2022-01-31 09:17:11,361 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 09:17:11,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 127 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=280, Invalid=3869, Unknown=11, NotChecked=0, Total=4160 [2022-01-31 09:17:11,362 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:17:11,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 442 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1271 Invalid, 0 Unknown, 384 Unchecked, 0.5s Time] [2022-01-31 09:17:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 09:17:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 97. [2022-01-31 09:17:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 80 states have internal predecessors, (82), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:17:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-01-31 09:17:11,365 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 78 [2022-01-31 09:17:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:17:11,365 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-01-31 09:17:11,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:17:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-01-31 09:17:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 09:17:11,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:17:11,366 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:17:11,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-31 09:17:11,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:17:11,566 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:17:11,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:17:11,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1467758903, now seen corresponding path program 15 times [2022-01-31 09:17:11,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:17:11,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039924549] [2022-01-31 09:17:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:17:11,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:17:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:11,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:17:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:11,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:17:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:11,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:17:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:11,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:17:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:11,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 09:17:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:11,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 09:17:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:17:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 10 proven. 141 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:17:11,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:17:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039924549] [2022-01-31 09:17:11,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039924549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:17:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660507819] [2022-01-31 09:17:11,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:17:11,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:17:11,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:17:11,890 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 09:17:11,891 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 09:17:12,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 09:17:12,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:17:12,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 09:17:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:17:12,296 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 09:17:12,372 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:17:12,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:17:58,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:17:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:17:58,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:07,563 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_248 Int)) (or (forall ((v_ArrVal_633 Int)) (<= c_main_~low~0 (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_248) c_main_~a~0.offset) v_ArrVal_633) (+ c_main_~a~0.offset 20)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_248)))) is different from false [2022-01-31 09:18:07,570 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 23 treesize of output 21 [2022-01-31 09:18:07,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-01-31 09:18:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 6 not checked. [2022-01-31 09:18:07,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660507819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:07,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:18:07,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 55 [2022-01-31 09:18:07,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602197614] [2022-01-31 09:18:07,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:07,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 09:18:07,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 09:18:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2664, Unknown=8, NotChecked=104, Total=2970 [2022-01-31 09:18:07,897 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 55 states, 52 states have (on average 3.0) internal successors, (156), 52 states have internal predecessors, (156), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:18:10,081 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 4))) (and (= 2 c_main_~low~0) (= c_main_~val2~0 3) (= 3 (select (select |c_#memory_int| c_main_~a~0.base) (+ .cse0 c_main_~a~0.offset))) (forall ((v_main_~i~0_248 Int)) (or (forall ((v_ArrVal_633 Int)) (<= c_main_~low~0 (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_248) c_main_~a~0.offset) v_ArrVal_633) (+ c_main_~a~0.offset 20)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_248)))) (= .cse0 20))) is different from false [2022-01-31 09:18:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:10,716 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-01-31 09:18:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 09:18:10,716 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 3.0) internal successors, (156), 52 states have internal predecessors, (156), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 82 [2022-01-31 09:18:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:10,717 INFO L225 Difference]: With dead ends: 174 [2022-01-31 09:18:10,717 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 09:18:10,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 136 SyntacticMatches, 16 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=284, Invalid=3747, Unknown=9, NotChecked=250, Total=4290 [2022-01-31 09:18:10,719 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:10,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 424 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1115 Invalid, 0 Unknown, 473 Unchecked, 0.4s Time] [2022-01-31 09:18:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 09:18:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2022-01-31 09:18:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 122 states have internal predecessors, (123), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:18:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2022-01-31 09:18:10,722 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 82 [2022-01-31 09:18:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:10,723 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2022-01-31 09:18:10,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 3.0) internal successors, (156), 52 states have internal predecessors, (156), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:18:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2022-01-31 09:18:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 09:18:10,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:10,724 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:10,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-31 09:18:10,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:10,924 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:10,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1463088910, now seen corresponding path program 16 times [2022-01-31 09:18:10,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:10,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535968463] [2022-01-31 09:18:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:10,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 09:18:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:18:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:18:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 09:18:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:18:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 09:18:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:18:11,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535968463] [2022-01-31 09:18:11,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535968463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:18:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560066284] [2022-01-31 09:18:11,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:18:11,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:11,060 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 09:18:11,062 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 09:18:11,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:18:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:11,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 09:18:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:18:11,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 09:18:11,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560066284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:11,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:18:11,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2022-01-31 09:18:11,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90575922] [2022-01-31 09:18:11,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:11,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:18:11,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:11,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:18:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:18:11,543 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 09:18:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:11,824 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2022-01-31 09:18:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 09:18:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 86 [2022-01-31 09:18:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:11,826 INFO L225 Difference]: With dead ends: 190 [2022-01-31 09:18:11,826 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 09:18:11,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:18:11,827 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:11,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 105 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:18:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 09:18:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2022-01-31 09:18:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 83 states have (on average 1.036144578313253) internal successors, (86), 84 states have internal predecessors, (86), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:18:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-01-31 09:18:11,829 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 86 [2022-01-31 09:18:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:11,829 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-01-31 09:18:11,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 09:18:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-01-31 09:18:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 09:18:11,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:11,830 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:11,847 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 09:18:12,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:12,039 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:12,039 INFO L85 PathProgramCache]: Analyzing trace with hash 947468274, now seen corresponding path program 17 times [2022-01-31 09:18:12,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495413330] [2022-01-31 09:18:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:12,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:12,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:12,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 09:18:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:12,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 09:18:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 09:18:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 09:18:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:12,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 09:18:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 170 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:18:12,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495413330] [2022-01-31 09:18:12,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495413330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:18:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939759269] [2022-01-31 09:18:12,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:18:12,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:12,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:12,476 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 09:18:12,503 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 09:18:12,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 09:18:12,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 09:18:12,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:12,911 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 09:18:12,969 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:18:12,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-31 09:18:12,982 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:18:12,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:18:13,021 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 09:18:13,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 09:19:00,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:19:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 3 proven. 177 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:19:01,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:19:58,824 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_752 Int) (v_main_~i~0_299 Int) (v_ArrVal_749 Int) (v_ArrVal_754 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_299)) (<= c_main_~low~0 (select (store (let ((.cse0 (* c_main_~i~0 4))) (store (store (select |c_#memory_int| c_main_~a~0.base) (+ .cse0 c_main_~a~0.offset 4) v_ArrVal_749) (+ .cse0 c_main_~a~0.offset) v_ArrVal_752)) (+ (* 4 v_main_~i~0_299) c_main_~a~0.offset) v_ArrVal_754) (+ c_main_~a~0.offset 20))))) is different from false