/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-cav19/array_init_var_plus_ind.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:37:36,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:37:36,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:37:36,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:37:36,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:37:36,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:37:36,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:37:36,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:37:36,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:37:36,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:37:36,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:37:36,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:37:36,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:37:36,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:37:36,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:37:36,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:37:36,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:37:36,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:37:36,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:37:36,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:37:36,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:37:36,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:37:36,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:37:36,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:37:36,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:37:36,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 10:37:36,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 10:37:36,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 10:37:36,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 10:37:36,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 10:37:36,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 10:37:36,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 10:37:36,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 10:37:36,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:37:36,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:37:36,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:37:36,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:37:36,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:37:36,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:37:36,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:37:36,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:37:36,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:37:36,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:37:36,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:37:36,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:37:36,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:37:36,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:37:36,543 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:37:36,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:37:36,544 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:37:36,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:37:36,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:37:36,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:37:36,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:37:36,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:37:36,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:37:36,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:37:36,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:37:36,545 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:37:36,545 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:37:36,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:37:36,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:37:36,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:37:36,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:37:36,764 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:37:36,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind.c [2022-01-31 10:37:36,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c030b2e54/f7bbaf9667324b3492e62aec044f593c/FLAGea8717917 [2022-01-31 10:37:37,199 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:37:37,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind.c [2022-01-31 10:37:37,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c030b2e54/f7bbaf9667324b3492e62aec044f593c/FLAGea8717917 [2022-01-31 10:37:37,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c030b2e54/f7bbaf9667324b3492e62aec044f593c [2022-01-31 10:37:37,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:37:37,218 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:37:37,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:37:37,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:37:37,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:37:37,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6bd10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37, skipping insertion in model container [2022-01-31 10:37:37,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:37:37,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:37:37,364 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-cav19/array_init_var_plus_ind.c[414,427] [2022-01-31 10:37:37,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:37:37,392 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:37:37,399 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-cav19/array_init_var_plus_ind.c[414,427] [2022-01-31 10:37:37,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:37:37,409 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:37:37,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37 WrapperNode [2022-01-31 10:37:37,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:37:37,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:37:37,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:37:37,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:37:37,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:37:37,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:37:37,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:37:37,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:37:37,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:37:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:37,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 10:37:37,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 10:37:37,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:37:37,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:37:37,506 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:37:37,506 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:37:37,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:37:37,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:37:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:37:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:37:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:37:37,548 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:37:37,549 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:37:37,630 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:37:37,637 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:37:37,638 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 10:37:37,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:37:37 BoogieIcfgContainer [2022-01-31 10:37:37,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:37:37,640 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:37:37,640 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:37:37,640 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:37:37,642 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:37:37" (1/1) ... [2022-01-31 10:37:37,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:37:37 BasicIcfg [2022-01-31 10:37:37,653 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:37:37,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:37:37,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:37:37,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:37:37,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:37:37" (1/4) ... [2022-01-31 10:37:37,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4083b999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:37:37, skipping insertion in model container [2022-01-31 10:37:37,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:37:37" (2/4) ... [2022-01-31 10:37:37,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4083b999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:37:37, skipping insertion in model container [2022-01-31 10:37:37,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:37:37" (3/4) ... [2022-01-31 10:37:37,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4083b999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:37:37, skipping insertion in model container [2022-01-31 10:37:37,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:37:37" (4/4) ... [2022-01-31 10:37:37,663 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.cJordan [2022-01-31 10:37:37,666 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:37:37,667 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:37:37,708 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:37:37,714 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 10:37:37,714 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:37:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:37:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 10:37:37,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:37,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:37,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash 642585017, now seen corresponding path program 1 times [2022-01-31 10:37:37,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:37,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399747119] [2022-01-31 10:37:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:37,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:37,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:37,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:37,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399747119] [2022-01-31 10:37:37,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399747119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:37:37,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:37:37,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:37:37,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612643836] [2022-01-31 10:37:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:37:37,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:37:37,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:37,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:37:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:37:37,979 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:38,022 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 10:37:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:37:38,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2022-01-31 10:37:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:38,028 INFO L225 Difference]: With dead ends: 25 [2022-01-31 10:37:38,028 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 10:37:38,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:37:38,032 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:38,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:37:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 10:37:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 10:37:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:37:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 10:37:38,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-31 10:37:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:38,056 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 10:37:38,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 10:37:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 10:37:38,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:38,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:38,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:37:38,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1530088698, now seen corresponding path program 1 times [2022-01-31 10:37:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847594855] [2022-01-31 10:37:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:38,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:38,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:38,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:38,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847594855] [2022-01-31 10:37:38,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847594855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:37:38,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:37:38,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:37:38,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839504027] [2022-01-31 10:37:38,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:37:38,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:37:38,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:37:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:37:38,183 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:38,261 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 10:37:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:37:38,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 10:37:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:38,263 INFO L225 Difference]: With dead ends: 28 [2022-01-31 10:37:38,264 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 10:37:38,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:37:38,266 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:38,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 19 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:37:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 10:37:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-01-31 10:37:38,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:37:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 10:37:38,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-01-31 10:37:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:38,278 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 10:37:38,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 10:37:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 10:37:38,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:38,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:38,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:37:38,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:38,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1622551480, now seen corresponding path program 1 times [2022-01-31 10:37:38,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:38,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272288766] [2022-01-31 10:37:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:38,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:38,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:38,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:38,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272288766] [2022-01-31 10:37:38,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272288766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:37:38,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:37:38,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:37:38,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416818376] [2022-01-31 10:37:38,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:37:38,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:37:38,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:38,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:37:38,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:37:38,361 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 10:37:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:38,427 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 10:37:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:37:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 10:37:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:38,429 INFO L225 Difference]: With dead ends: 25 [2022-01-31 10:37:38,429 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 10:37:38,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:37:38,431 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:38,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:37:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 10:37:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-31 10:37:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:37:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 10:37:38,434 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2022-01-31 10:37:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:38,434 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 10:37:38,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 10:37:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 10:37:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 10:37:38,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:38,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:38,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 10:37:38,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2003313729, now seen corresponding path program 1 times [2022-01-31 10:37:38,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:38,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42848488] [2022-01-31 10:37:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:38,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:38,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:38,508 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 10:37:38,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42848488] [2022-01-31 10:37:38,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42848488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943727316] [2022-01-31 10:37:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:38,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:38,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:37:38,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 10:37:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:37:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:38,699 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 10:37:38,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:38,768 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 10:37:38,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943727316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:37:38,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:37:38,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-01-31 10:37:38,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319989797] [2022-01-31 10:37:38,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:38,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:37:38,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:38,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:37:38,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:37:38,770 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 10:37:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:38,911 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-01-31 10:37:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:37:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2022-01-31 10:37:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:38,912 INFO L225 Difference]: With dead ends: 42 [2022-01-31 10:37:38,912 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 10:37:38,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:37:38,913 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:38,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:37:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 10:37:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-01-31 10:37:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:37:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 10:37:38,917 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2022-01-31 10:37:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:38,917 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 10:37:38,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 10:37:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 10:37:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:37:38,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:38,918 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:38,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 10:37:39,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:39,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash -980827736, now seen corresponding path program 1 times [2022-01-31 10:37:39,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:39,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756325709] [2022-01-31 10:37:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:39,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:39,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:39,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756325709] [2022-01-31 10:37:39,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756325709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277265172] [2022-01-31 10:37:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:39,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:39,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:39,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:37:39,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 10:37:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 10:37:39,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:39,397 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 10:37:39,449 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 10:37:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:39,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:39,524 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 10:37:39,527 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 10:37:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:39,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277265172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:37:39,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:37:39,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 15 [2022-01-31 10:37:39,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203850128] [2022-01-31 10:37:39,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:39,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:37:39,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:37:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:37:39,597 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:39,851 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-01-31 10:37:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:37:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 10:37:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:39,853 INFO L225 Difference]: With dead ends: 43 [2022-01-31 10:37:39,853 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 10:37:39,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:37:39,854 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:39,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 70 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:37:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 10:37:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-31 10:37:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 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 10:37:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-01-31 10:37:39,858 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 20 [2022-01-31 10:37:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:39,858 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-01-31 10:37:39,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-01-31 10:37:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 10:37:39,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:39,858 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:39,875 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 10:37:40,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:40,075 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash 855145601, now seen corresponding path program 2 times [2022-01-31 10:37:40,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:40,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066796032] [2022-01-31 10:37:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:40,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:40,267 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 10:37:40,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:40,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066796032] [2022-01-31 10:37:40,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066796032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:40,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714668256] [2022-01-31 10:37:40,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:37:40,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:40,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:37:40,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 10:37:40,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:37:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:37:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:37:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:40,418 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 10:37:40,480 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:37:40,480 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 10:37:40,523 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 10:37:40,572 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 10:37:40,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:42,674 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_21 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_21)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_21 4) |c_main_~#a~0.offset|) v_ArrVal_48) (+ 4 |c_main_~#a~0.offset|)))))) is different from false [2022-01-31 10:37:42,694 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 10:37:42,697 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 10:37:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-01-31 10:37:42,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714668256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:37:42,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:37:42,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-01-31 10:37:42,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883911243] [2022-01-31 10:37:42,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:42,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:37:42,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:37:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=442, Unknown=1, NotChecked=42, Total=552 [2022-01-31 10:37:42,806 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:44,855 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~i~0 1) (<= 1 c_main_~i~0) (= (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 0) (<= 0 c_main_~j~0) (forall ((v_main_~i~0_21 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_21)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_21 4) |c_main_~#a~0.offset|) v_ArrVal_48) (+ 4 |c_main_~#a~0.offset|)))))) (= c_main_~i~0 1) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:37:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:45,089 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-01-31 10:37:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:37:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 10:37:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:45,091 INFO L225 Difference]: With dead ends: 45 [2022-01-31 10:37:45,091 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 10:37:45,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=142, Invalid=856, Unknown=2, NotChecked=122, Total=1122 [2022-01-31 10:37:45,092 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:45,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 70 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 281 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-01-31 10:37:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 10:37:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-01-31 10:37:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 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 10:37:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-01-31 10:37:45,095 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 23 [2022-01-31 10:37:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:45,096 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-01-31 10:37:45,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:37:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-01-31 10:37:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 10:37:45,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:45,096 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:45,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:37:45,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:45,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1080447843, now seen corresponding path program 1 times [2022-01-31 10:37:45,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736873740] [2022-01-31 10:37:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:45,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:45,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:45,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 10:37:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:45,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736873740] [2022-01-31 10:37:45,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736873740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833001858] [2022-01-31 10:37:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:45,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:45,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:45,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:37:45,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:37:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:37:45,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:45,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:45,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833001858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:37:45,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:37:45,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 10:37:45,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295135570] [2022-01-31 10:37:45,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:45,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:37:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:37:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:37:45,585 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:37:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:45,680 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-01-31 10:37:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:37:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-01-31 10:37:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:45,682 INFO L225 Difference]: With dead ends: 42 [2022-01-31 10:37:45,682 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 10:37:45,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-31 10:37:45,684 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:45,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:37:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 10:37:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 10:37:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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 10:37:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 10:37:45,693 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2022-01-31 10:37:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:45,694 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 10:37:45,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:37:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 10:37:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 10:37:45,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:45,695 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:45,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:37:45,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:45,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1169194614, now seen corresponding path program 2 times [2022-01-31 10:37:45,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13557378] [2022-01-31 10:37:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:45,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:46,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:46,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 10:37:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:46,099 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 10:37:46,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:46,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13557378] [2022-01-31 10:37:46,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13557378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:46,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284728056] [2022-01-31 10:37:46,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:37:46,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:46,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:46,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:37:46,102 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 10:37:46,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:37:46,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:37:46,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 10:37:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:46,262 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 10:37:46,526 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 10:37:46,526 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 10:37:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:46,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:46,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284728056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:46,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:37:46,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 10:37:46,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387179315] [2022-01-31 10:37:46,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 10:37:46,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 10:37:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-01-31 10:37:46,698 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:37:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:47,092 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-01-31 10:37:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 10:37:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-01-31 10:37:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:47,092 INFO L225 Difference]: With dead ends: 57 [2022-01-31 10:37:47,093 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 10:37:47,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 10:37:47,094 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:47,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 204 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 311 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2022-01-31 10:37:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 10:37:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 10:37:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 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 10:37:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-01-31 10:37:47,096 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2022-01-31 10:37:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:47,097 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-01-31 10:37:47,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:37:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-01-31 10:37:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 10:37:47,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:47,097 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:47,129 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 10:37:47,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:47,314 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash 289725231, now seen corresponding path program 1 times [2022-01-31 10:37:47,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:47,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675966614] [2022-01-31 10:37:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:47,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:47,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:47,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 10:37:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 10:37:47,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675966614] [2022-01-31 10:37:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675966614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536193079] [2022-01-31 10:37:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:47,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:47,380 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 10:37:47,384 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 10:37:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:47,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 10:37:47,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:37:47,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 10:37:47,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536193079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:37:47,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:37:47,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-01-31 10:37:47,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721476476] [2022-01-31 10:37:47,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:47,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 10:37:47,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:47,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 10:37:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-01-31 10:37:47,606 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:37:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:47,841 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2022-01-31 10:37:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:37:47,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-01-31 10:37:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:47,843 INFO L225 Difference]: With dead ends: 96 [2022-01-31 10:37:47,843 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 10:37:47,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2022-01-31 10:37:47,843 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 221 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:47,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 21 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:37:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 10:37:47,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 54. [2022-01-31 10:37:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.173913043478261) internal successors, (54), 47 states have internal predecessors, (54), 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 10:37:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-01-31 10:37:47,848 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 33 [2022-01-31 10:37:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:47,848 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-01-31 10:37:47,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:37:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-01-31 10:37:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 10:37:47,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:47,849 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:47,867 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 10:37:48,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:48,059 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1597944317, now seen corresponding path program 3 times [2022-01-31 10:37:48,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213065384] [2022-01-31 10:37:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:48,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:48,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:48,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 10:37:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:48,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:48,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213065384] [2022-01-31 10:37:48,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213065384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:48,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814809637] [2022-01-31 10:37:48,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:37:48,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:48,228 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 10:37:48,229 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 10:37:48,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:37:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:37:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 10:37:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:48,324 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 10:37:48,371 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 10:37:48,371 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 27 treesize of output 26 [2022-01-31 10:37:50,475 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 10:37:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:50,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:37:54,642 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_45 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_45)) (forall ((v_ArrVal_122 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_45 4) |c_main_~#a~0.offset|) v_ArrVal_122) (+ 8 |c_main_~#a~0.offset|)))))) is different from false [2022-01-31 10:37:54,658 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 10:37:54,661 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 10:37:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-01-31 10:37:54,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814809637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:37:54,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:37:54,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 30 [2022-01-31 10:37:54,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114362698] [2022-01-31 10:37:54,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:37:54,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:37:54,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:37:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:37:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=721, Unknown=3, NotChecked=54, Total=870 [2022-01-31 10:37:54,867 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 30 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:37:56,999 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 1 (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_45 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_45)) (forall ((v_ArrVal_122 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_45 4) |c_main_~#a~0.offset|) v_ArrVal_122) (+ 8 |c_main_~#a~0.offset|)))))) (<= 2 c_main_~i~0) (<= 1 c_main_~j~0) (<= c_main_~i~0 2) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:37:57,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:37:57,267 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-01-31 10:37:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 10:37:57,267 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-01-31 10:37:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:37:57,268 INFO L225 Difference]: With dead ends: 75 [2022-01-31 10:37:57,268 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 10:37:57,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=205, Invalid=1521, Unknown=4, NotChecked=162, Total=1892 [2022-01-31 10:37:57,269 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:37:57,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 116 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 447 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-01-31 10:37:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 10:37:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2022-01-31 10:37:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.150943396226415) internal successors, (61), 54 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:37:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-31 10:37:57,273 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 34 [2022-01-31 10:37:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:37:57,273 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-31 10:37:57,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:37:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-31 10:37:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 10:37:57,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:37:57,274 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:37:57,295 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 10:37:57,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:57,475 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:37:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:37:57,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1247608086, now seen corresponding path program 4 times [2022-01-31 10:37:57,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:37:57,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114128402] [2022-01-31 10:37:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:37:57,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:37:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:57,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:37:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:57,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 10:37:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:37:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:37:57,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:37:57,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114128402] [2022-01-31 10:37:57,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114128402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:37:57,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768433239] [2022-01-31 10:37:57,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:37:57,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:37:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:37:57,697 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 10:37:57,732 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 10:37:57,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:37:57,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:37:57,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 10:37:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:37:57,827 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 10:37:57,862 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:37:57,863 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 10:37:57,904 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:37:57,904 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 10:37:59,999 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 10:38:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:00,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:35,981 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_55 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_55)) (forall ((v_ArrVal_151 Int) (v_main_~i~0_54 Int) (v_ArrVal_149 Int)) (or (not (<= (+ v_main_~i~0_55 1) v_main_~i~0_54)) (<= 0 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_55 4) |c_main_~#a~0.offset|) v_ArrVal_149) (+ (* v_main_~i~0_54 4) |c_main_~#a~0.offset|) v_ArrVal_151) (+ 8 |c_main_~#a~0.offset|))))))) is different from false [2022-01-31 10:38:36,003 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 10:38:36,007 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 794 treesize of output 778 [2022-01-31 10:38:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-01-31 10:38:36,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768433239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:36,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:36,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 33 [2022-01-31 10:38:36,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341734097] [2022-01-31 10:38:36,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:36,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:38:36,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:36,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:38:36,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=867, Unknown=17, NotChecked=60, Total=1056 [2022-01-31 10:38:36,469 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 33 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:38:38,569 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 1 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|))) (<= 2 c_main_~i~0) (<= 1 c_main_~j~0) (<= c_main_~i~0 2) (forall ((v_main_~i~0_55 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_55)) (forall ((v_ArrVal_151 Int) (v_main_~i~0_54 Int) (v_ArrVal_149 Int)) (or (not (<= (+ v_main_~i~0_55 1) v_main_~i~0_54)) (<= 0 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_55 4) |c_main_~#a~0.offset|) v_ArrVal_149) (+ (* v_main_~i~0_54 4) |c_main_~#a~0.offset|) v_ArrVal_151) (+ 8 |c_main_~#a~0.offset|))))))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:38:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:38,850 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-01-31 10:38:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:38:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-01-31 10:38:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:38,852 INFO L225 Difference]: With dead ends: 79 [2022-01-31 10:38:38,852 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 10:38:38,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=251, Invalid=1901, Unknown=18, NotChecked=182, Total=2352 [2022-01-31 10:38:38,853 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:38,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 107 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 364 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-01-31 10:38:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 10:38:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-01-31 10:38:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 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 10:38:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-01-31 10:38:38,857 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 37 [2022-01-31 10:38:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:38,857 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-01-31 10:38:38,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:38:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-01-31 10:38:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 10:38:38,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:38,858 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:38,879 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 10:38:39,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 10:38:39,068 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash -937986062, now seen corresponding path program 5 times [2022-01-31 10:38:39,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:39,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852492954] [2022-01-31 10:38:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:39,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:39,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 10:38:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:39,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 10:38:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:38:39,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:39,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852492954] [2022-01-31 10:38:39,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852492954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:39,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473809983] [2022-01-31 10:38:39,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:38:39,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:39,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:39,399 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 10:38:39,400 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 10:38:39,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 10:38:39,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:39,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 10:38:39,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:39,612 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 10:38:39,836 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 10:38:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:38:39,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:42,020 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 10:38:42,022 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 10:38:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:38:42,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473809983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:42,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:42,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 42 [2022-01-31 10:38:42,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392569648] [2022-01-31 10:38:42,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:42,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 10:38:42,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 10:38:42,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1569, Unknown=1, NotChecked=0, Total=1722 [2022-01-31 10:38:42,268 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 42 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 9 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 10:38:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:42,941 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-01-31 10:38:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:38:42,942 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 9 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 10:38:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:42,942 INFO L225 Difference]: With dead ends: 88 [2022-01-31 10:38:42,942 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 10:38:42,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=314, Invalid=3107, Unknown=1, NotChecked=0, Total=3422 [2022-01-31 10:38:42,944 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:42,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 182 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 629 Invalid, 0 Unknown, 278 Unchecked, 0.2s Time] [2022-01-31 10:38:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 10:38:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 10:38:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 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 10:38:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-01-31 10:38:42,947 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 42 [2022-01-31 10:38:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:42,947 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-01-31 10:38:42,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 9 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 10:38:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-01-31 10:38:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:38:42,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:42,948 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:42,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 10:38:43,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:43,159 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1013553675, now seen corresponding path program 6 times [2022-01-31 10:38:43,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:43,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341986931] [2022-01-31 10:38:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:43,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:43,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:43,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 10:38:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:43,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 10:38:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:38:43,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:43,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341986931] [2022-01-31 10:38:43,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341986931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:43,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794782310] [2022-01-31 10:38:43,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:38:43,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:43,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:43,487 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 10:38:43,491 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 10:38:43,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 10:38:43,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:43,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 10:38:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:43,735 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 10:38:43,791 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:38:43,792 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 10:38:44,011 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 10:38:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:38:44,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:48,238 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_72 Int)) (or (forall ((v_ArrVal_201 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_72 4) |c_main_~#a~0.offset|) v_ArrVal_201) (+ 12 |c_main_~#a~0.offset|)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_72)))) is different from false [2022-01-31 10:38:48,246 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 10:38:48,249 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 10:38:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2022-01-31 10:38:48,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794782310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:48,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:48,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 47 [2022-01-31 10:38:48,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660232124] [2022-01-31 10:38:48,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:48,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 10:38:48,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 10:38:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1888, Unknown=2, NotChecked=88, Total=2162 [2022-01-31 10:38:48,544 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 9 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 10:38:50,770 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 4))) (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (= (+ .cse0 (- 12) |c_main_~#a~0.offset|) 0) (forall ((v_main_~i~0_72 Int)) (or (forall ((v_ArrVal_201 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_72 4) |c_main_~#a~0.offset|) v_ArrVal_201) (+ 12 |c_main_~#a~0.offset|)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_72)))) (<= 3 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ .cse0 |c_main_~#a~0.offset|))) (<= 3 c_main_~j~0) (= |c_main_~#a~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|))) is different from false [2022-01-31 10:38:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:51,232 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-01-31 10:38:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:38:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 9 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 45 [2022-01-31 10:38:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:51,233 INFO L225 Difference]: With dead ends: 72 [2022-01-31 10:38:51,233 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 10:38:51,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=363, Invalid=3674, Unknown=3, NotChecked=250, Total=4290 [2022-01-31 10:38:51,235 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:51,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 125 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 555 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-01-31 10:38:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 10:38:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-01-31 10:38:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 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 10:38:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-01-31 10:38:51,245 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 45 [2022-01-31 10:38:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:51,246 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-01-31 10:38:51,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 9 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 10:38:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-01-31 10:38:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 10:38:51,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:51,247 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:51,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 10:38:51,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 10:38:51,464 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash -73895424, now seen corresponding path program 7 times [2022-01-31 10:38:51,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:51,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17969630] [2022-01-31 10:38:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:51,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 10:38:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 10:38:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 10:38:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:38:51,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:51,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17969630] [2022-01-31 10:38:51,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17969630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:51,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115439185] [2022-01-31 10:38:51,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:38:51,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:51,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:51,772 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 10:38:51,773 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 10:38:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 10:38:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:52,016 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 10:38:59,778 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 10:38:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:38:59,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:39:02,030 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 10:39:02,032 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 10:39:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:39:02,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115439185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:39:02,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:39:02,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 18] total 50 [2022-01-31 10:39:02,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930334037] [2022-01-31 10:39:02,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:39:02,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 10:39:02,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:39:02,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 10:39:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2267, Unknown=3, NotChecked=0, Total=2450 [2022-01-31 10:39:02,361 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 50 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 12 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 10:39:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:39:10,455 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2022-01-31 10:39:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 10:39:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 12 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 53 [2022-01-31 10:39:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:39:10,456 INFO L225 Difference]: With dead ends: 105 [2022-01-31 10:39:10,456 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 10:39:10,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=449, Invalid=5244, Unknown=7, NotChecked=0, Total=5700 [2022-01-31 10:39:10,458 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:39:10,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 192 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 930 Invalid, 0 Unknown, 254 Unchecked, 0.3s Time] [2022-01-31 10:39:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 10:39:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-31 10:39:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 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 10:39:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-01-31 10:39:10,461 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 53 [2022-01-31 10:39:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:39:10,461 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-01-31 10:39:10,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 12 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 10:39:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-01-31 10:39:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 10:39:10,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:39:10,462 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:39:10,478 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 10:39:10,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 10:39:10,669 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:39:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:39:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1482044999, now seen corresponding path program 8 times [2022-01-31 10:39:10,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:39:10,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639314618] [2022-01-31 10:39:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:39:10,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:39:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:10,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:39:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:10,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 10:39:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:10,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 10:39:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:10,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 10:39:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:39:10,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:39:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639314618] [2022-01-31 10:39:10,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639314618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:39:10,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595841852] [2022-01-31 10:39:10,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:39:10,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:39:10,929 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 10:39:10,930 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 10:39:10,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:39:10,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:39:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 10:39:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:39:11,075 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 10:39:11,130 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 10:39:11,131 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 27 treesize of output 26 [2022-01-31 10:39:29,434 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 10:39:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:39:29,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:40:09,754 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 10:40:09,757 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 10:40:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:40:10,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595841852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:40:10,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:40:10,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 45 [2022-01-31 10:40:10,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541462037] [2022-01-31 10:40:10,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:40:10,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 10:40:10,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:40:10,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 10:40:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1806, Unknown=22, NotChecked=0, Total=1980 [2022-01-31 10:40:10,098 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 45 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 10:40:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:40:10,657 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-01-31 10:40:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 10:40:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 56 [2022-01-31 10:40:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:40:10,659 INFO L225 Difference]: With dead ends: 102 [2022-01-31 10:40:10,659 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 10:40:10,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=317, Invalid=3821, Unknown=22, NotChecked=0, Total=4160 [2022-01-31 10:40:10,660 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:40:10,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 243 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 819 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-01-31 10:40:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 10:40:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2022-01-31 10:40:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 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 10:40:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-01-31 10:40:10,664 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 56 [2022-01-31 10:40:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:40:10,664 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-01-31 10:40:10,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 10:40:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-01-31 10:40:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 10:40:10,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:40:10,665 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:40:10,686 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 10:40:10,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 10:40:10,886 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:40:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:40:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1078839136, now seen corresponding path program 9 times [2022-01-31 10:40:10,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:40:10,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567694912] [2022-01-31 10:40:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:40:10,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:40:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:40:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:11,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 10:40:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:11,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 10:40:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:11,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 10:40:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:40:11,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:40:11,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567694912] [2022-01-31 10:40:11,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567694912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:40:11,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267911968] [2022-01-31 10:40:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:40:11,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:40:11,168 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 10:40:11,184 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 10:40:11,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 10:40:11,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:40:11,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 10:40:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:40:11,346 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 10:40:11,401 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:40:11,401 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 27 treesize of output 26 [2022-01-31 10:40:11,467 INFO L353 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-01-31 10:40:11,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-31 10:40:11,514 INFO L353 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-01-31 10:40:11,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-31 10:40:16,011 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 10:40:16,011 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 36 treesize of output 12 [2022-01-31 10:40:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 98 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:40:16,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:43:12,608 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 77 treesize of output 73 [2022-01-31 10:43:12,622 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 10:43:12,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4139 treesize of output 4099 [2022-01-31 10:43:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 12 proven. 86 refuted. 9 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:43:18,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267911968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:43:18,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:43:18,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 25] total 62 [2022-01-31 10:43:18,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643171106] [2022-01-31 10:43:18,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:43:18,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 10:43:18,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:43:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 10:43:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3386, Unknown=87, NotChecked=0, Total=3782 [2022-01-31 10:43:18,723 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 62 states, 57 states have (on average 2.0) internal successors, (114), 59 states have internal predecessors, (114), 13 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:43:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:43:31,445 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2022-01-31 10:43:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 10:43:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 57 states have (on average 2.0) internal successors, (114), 59 states have internal predecessors, (114), 13 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 59 [2022-01-31 10:43:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:43:31,446 INFO L225 Difference]: With dead ends: 105 [2022-01-31 10:43:31,446 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 10:43:31,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 193.2s TimeCoverageRelationStatistics Valid=677, Invalid=7416, Unknown=97, NotChecked=0, Total=8190 [2022-01-31 10:43:31,448 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:43:31,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 234 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 955 Invalid, 0 Unknown, 202 Unchecked, 0.4s Time] [2022-01-31 10:43:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 10:43:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2022-01-31 10:43:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.08) internal successors, (81), 77 states have internal predecessors, (81), 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 10:43:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-01-31 10:43:31,451 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 59 [2022-01-31 10:43:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:43:31,451 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-01-31 10:43:31,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 57 states have (on average 2.0) internal successors, (114), 59 states have internal predecessors, (114), 13 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:43:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-01-31 10:43:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 10:43:31,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:43:31,453 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:43:31,471 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 10:43:31,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:43:31,654 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:43:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:43:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash -550301124, now seen corresponding path program 10 times [2022-01-31 10:43:31,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:43:31,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211075073] [2022-01-31 10:43:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:43:31,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:43:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:43:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:32,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 10:43:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:32,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 10:43:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:32,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 10:43:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 10:43:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 77 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:43:32,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:43:32,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211075073] [2022-01-31 10:43:32,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211075073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:43:32,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428365490] [2022-01-31 10:43:32,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:43:32,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:43:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:43:32,064 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 10:43:32,068 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 10:43:32,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:43:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:43:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 10:43:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:43:32,378 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 13 treesize of output 9 [2022-01-31 10:43:47,643 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 10:43:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:43:47,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:43:49,974 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 10:43:49,976 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 10:43:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:43:50,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428365490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:43:50,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:43:50,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 59 [2022-01-31 10:43:50,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027887563] [2022-01-31 10:43:50,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:43:50,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 10:43:50,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:43:50,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 10:43:50,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3200, Unknown=3, NotChecked=0, Total=3422 [2022-01-31 10:43:50,452 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 59 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 15 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 10:43:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:43:51,974 INFO L93 Difference]: Finished difference Result 123 states and 129 transitions. [2022-01-31 10:43:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 10:43:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 15 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 64 [2022-01-31 10:43:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:43:51,976 INFO L225 Difference]: With dead ends: 123 [2022-01-31 10:43:51,976 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 10:43:51,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=557, Invalid=7272, Unknown=3, NotChecked=0, Total=7832 [2022-01-31 10:43:51,978 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:43:51,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 318 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1430 Invalid, 0 Unknown, 456 Unchecked, 0.6s Time] [2022-01-31 10:43:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 10:43:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-01-31 10:43:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.078125) internal successors, (69), 65 states have internal predecessors, (69), 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 10:43:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-01-31 10:43:51,983 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 64 [2022-01-31 10:43:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:43:51,984 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-01-31 10:43:51,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 15 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 10:43:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-01-31 10:43:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 10:43:51,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:43:51,985 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:43:52,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 10:43:52,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:43:52,204 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:43:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:43:52,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1060613013, now seen corresponding path program 11 times [2022-01-31 10:43:52,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:43:52,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998719267] [2022-01-31 10:43:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:43:52,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:43:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:43:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 10:43:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:52,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 10:43:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:52,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 10:43:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:52,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 10:43:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 109 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:43:52,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:43:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998719267] [2022-01-31 10:43:52,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998719267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:43:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260128791] [2022-01-31 10:43:52,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:43:52,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:43:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:43:52,589 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 10:43:52,627 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 10:43:52,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:43:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:43:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 10:43:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:43:52,815 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 10:43:52,877 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 10:43:52,877 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 27 treesize of output 26 [2022-01-31 10:44:18,518 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 10:44:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:44:18,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:44:22,857 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_133 Int)) (or (forall ((v_ArrVal_365 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_133) |c_main_~#a~0.offset|) v_ArrVal_365) (+ 20 |c_main_~#a~0.offset|)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_133)))) is different from false [2022-01-31 10:44:22,870 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 10:44:22,872 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 10:44:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 103 refuted. 0 times theorem prover too weak. 24 trivial. 6 not checked. [2022-01-31 10:44:23,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260128791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:44:23,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:44:23,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 23] total 52 [2022-01-31 10:44:23,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908342714] [2022-01-31 10:44:23,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:44:23,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 10:44:23,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:44:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 10:44:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2373, Unknown=6, NotChecked=98, Total=2652 [2022-01-31 10:44:23,360 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 52 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 10:44:25,658 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (forall ((v_main_~i~0_133 Int)) (or (forall ((v_ArrVal_365 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_133) |c_main_~#a~0.offset|) v_ArrVal_365) (+ 20 |c_main_~#a~0.offset|)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_133)))) (<= 5 c_main_~i~0) (<= 10 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|))) (<= c_main_~i~0 5) (<= 10 c_main_~j~0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:44:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:44:34,204 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2022-01-31 10:44:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 10:44:34,205 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 67 [2022-01-31 10:44:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:44:34,206 INFO L225 Difference]: With dead ends: 119 [2022-01-31 10:44:34,206 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 10:44:34,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 106 SyntacticMatches, 14 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=359, Invalid=5040, Unknown=11, NotChecked=290, Total=5700 [2022-01-31 10:44:34,207 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:44:34,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 239 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1139 Invalid, 0 Unknown, 227 Unchecked, 0.4s Time] [2022-01-31 10:44:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 10:44:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2022-01-31 10:44:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 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 10:44:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-01-31 10:44:34,210 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 67 [2022-01-31 10:44:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:44:34,210 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-01-31 10:44:34,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 10:44:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-01-31 10:44:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 10:44:34,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:44:34,211 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:44:34,233 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 10:44:34,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:44:34,416 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:44:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:44:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash -160897124, now seen corresponding path program 12 times [2022-01-31 10:44:34,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:44:34,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207343727] [2022-01-31 10:44:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:44:34,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:44:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:34,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:44:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:34,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 10:44:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:34,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 10:44:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:34,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 10:44:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:34,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 10:44:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 132 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:44:34,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:44:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207343727] [2022-01-31 10:44:34,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207343727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:44:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891063109] [2022-01-31 10:44:34,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:44:34,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:44:34,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:44:34,771 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 10:44:34,775 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 10:44:34,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 10:44:34,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:44:34,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 10:44:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:44:34,900 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 10:44:34,987 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 10:44:34,987 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 50 treesize of output 40 [2022-01-31 10:44:35,074 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 10:44:35,075 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 50 treesize of output 40 [2022-01-31 10:44:35,148 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 10:44:35,148 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 50 treesize of output 40 [2022-01-31 10:44:35,270 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 10:44:35,270 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 50 treesize of output 40 [2022-01-31 10:44:35,399 INFO L353 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2022-01-31 10:44:35,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2022-01-31 10:44:35,491 INFO L353 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2022-01-31 10:44:35,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2022-01-31 10:44:36,640 INFO L353 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2022-01-31 10:44:36,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 23 [2022-01-31 10:44:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:44:36,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:44:38,943 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_148 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_148)) (forall ((v_ArrVal_415 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_148) |c_main_~#a~0.offset|) v_ArrVal_415) (+ 20 |c_main_~#a~0.offset|)))))) is different from false [2022-01-31 10:44:39,447 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_415 Int) (v_main_~i~0_148 Int) (v_ArrVal_413 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_148)) (<= 0 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|) v_ArrVal_413) (+ (* 4 v_main_~i~0_148) |c_main_~#a~0.offset|) v_ArrVal_415) (+ 20 |c_main_~#a~0.offset|))))) is different from false [2022-01-31 10:44:41,497 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_149 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_149)) (forall ((v_ArrVal_415 Int) (v_main_~i~0_148 Int) (v_ArrVal_413 Int)) (or (not (<= (+ v_main_~i~0_149 1) v_main_~i~0_148)) (<= 0 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_149) |c_main_~#a~0.offset|) v_ArrVal_413) (+ (* 4 v_main_~i~0_148) |c_main_~#a~0.offset|) v_ArrVal_415) (+ 20 |c_main_~#a~0.offset|))))))) is different from false [2022-01-31 10:46:20,988 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 62 treesize of output 60 [2022-01-31 10:46:21,015 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 3510508 treesize of output 3506412 [2022-01-31 10:46:28,024 WARN L228 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 1881 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 10:47:06,092 WARN L228 SmtUtils]: Spent 24.04s on a formula simplification. DAG size of input: 1872 DAG size of output: 1872 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 10:47:43,571 WARN L228 SmtUtils]: Spent 7.82s on a formula simplification that was a NOOP. DAG size: 1651 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 10:48:01,589 WARN L228 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 1649 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 10:48:18,235 WARN L228 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 968 DAG size of output: 968 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 10:48:31,222 WARN L228 SmtUtils]: Spent 9.60s on a formula simplification. DAG size of input: 966 DAG size of output: 966 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)