/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-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:18:59,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:18:59,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:18:59,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:18:59,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:18:59,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:18:59,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:18:59,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:18:59,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:18:59,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:18:59,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:18:59,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:18:59,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:18:59,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:18:59,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:18:59,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:18:59,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:18:59,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:18:59,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:18:59,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:18:59,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:18:59,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:18:59,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:18:59,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:18:59,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:18:59,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:18:59,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:18:59,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:18:59,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:18:59,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:18:59,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:18:59,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:18:59,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:18:59,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:18:59,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:18:59,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:18:59,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:18:59,369 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:18:59,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:18:59,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:18:59,371 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:18:59,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:18:59,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:18:59,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:18:59,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:18:59,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:18:59,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:18:59,373 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:18:59,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:18:59,373 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:18:59,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:18:59,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:18:59,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:18:59,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:18:59,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:18:59,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:18:59,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:18:59,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:18:59,375 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:18:59,375 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:18:59,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:18:59,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:18:59,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:18:59,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:18:59,656 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:18:59,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2022-01-31 08:18:59,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e5472c41/4632bfd0015b4ced9054a241466352ca/FLAGe3d630e72 [2022-01-31 08:19:00,179 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:19:00,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2022-01-31 08:19:00,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e5472c41/4632bfd0015b4ced9054a241466352ca/FLAGe3d630e72 [2022-01-31 08:19:00,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e5472c41/4632bfd0015b4ced9054a241466352ca [2022-01-31 08:19:00,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:19:00,216 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:19:00,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:19:00,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:19:00,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:19:00,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596051a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00, skipping insertion in model container [2022-01-31 08:19:00,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:19:00,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:19:00,407 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-industry-pattern/array_of_struct_ptr_flag_init.i[959,972] [2022-01-31 08:19:00,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:19:00,430 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:19:00,441 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-industry-pattern/array_of_struct_ptr_flag_init.i[959,972] [2022-01-31 08:19:00,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:19:00,456 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:19:00,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00 WrapperNode [2022-01-31 08:19:00,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:19:00,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:19:00,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:19:00,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:19:00,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:19:00,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:19:00,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:19:00,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:19:00,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:19:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:00,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:19:00,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:19:00,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:19:00,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:19:00,567 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:19:00,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:19:00,567 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2022-01-31 08:19:00,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:19:00,568 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 08:19:00,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:19:00,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:19:00,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:19:00,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:19:00,570 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:19:00,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:19:00,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:19:00,570 INFO L130 BoogieDeclarations]: Found specification of procedure init [2022-01-31 08:19:00,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 08:19:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 08:19:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:19:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:19:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 08:19:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:19:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:19:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:19:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:19:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:19:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:19:00,695 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:19:00,697 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:19:00,884 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:19:00,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:19:00,890 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:19:00,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:19:00 BoogieIcfgContainer [2022-01-31 08:19:00,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:19:00,892 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:19:00,892 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:19:00,894 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:19:00,896 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:19:00" (1/1) ... [2022-01-31 08:19:00,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:19:00 BasicIcfg [2022-01-31 08:19:00,913 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:19:00,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:19:00,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:19:00,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:19:00,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:19:00" (1/4) ... [2022-01-31 08:19:00,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f61d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:19:00, skipping insertion in model container [2022-01-31 08:19:00,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00" (2/4) ... [2022-01-31 08:19:00,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f61d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:19:00, skipping insertion in model container [2022-01-31 08:19:00,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:19:00" (3/4) ... [2022-01-31 08:19:00,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f61d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:19:00, skipping insertion in model container [2022-01-31 08:19:00,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:19:00" (4/4) ... [2022-01-31 08:19:00,922 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.iJordan [2022-01-31 08:19:00,927 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:19:00,928 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:19:00,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:19:00,992 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:19:00,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:19:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:19:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:19:01,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:01,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:01,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1643633981, now seen corresponding path program 1 times [2022-01-31 08:19:01,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:01,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743758063] [2022-01-31 08:19:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:01,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:19:01,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743758063] [2022-01-31 08:19:01,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743758063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:19:01,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:19:01,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:19:01,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752103238] [2022-01-31 08:19:01,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:19:01,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:19:01,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:19:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:19:01,332 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:01,454 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-31 08:19:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 08:19:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 08:19:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:01,469 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:19:01,469 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:19:01,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:19:01,477 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:01,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:19:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:19:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 08:19:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:19:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 08:19:01,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-31 08:19:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:01,512 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 08:19:01,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 08:19:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:19:01,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:01,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:01,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:19:01,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash -779440261, now seen corresponding path program 1 times [2022-01-31 08:19:01,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:01,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615432069] [2022-01-31 08:19:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:01,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:19:01,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:01,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615432069] [2022-01-31 08:19:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615432069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:19:01,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:19:01,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:19:01,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365788004] [2022-01-31 08:19:01,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:19:01,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:19:01,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:19:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:19:01,653 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:01,810 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-01-31 08:19:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:19:01,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 08:19:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:01,813 INFO L225 Difference]: With dead ends: 39 [2022-01-31 08:19:01,813 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 08:19:01,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:19:01,820 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:01,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:19:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 08:19:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-31 08:19:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:19:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 08:19:01,842 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2022-01-31 08:19:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:01,842 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 08:19:01,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 08:19:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 08:19:01,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:01,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:01,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:19:01,844 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash -506748085, now seen corresponding path program 1 times [2022-01-31 08:19:01,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:01,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074511987] [2022-01-31 08:19:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:01,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:01,957 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 08:19:01,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074511987] [2022-01-31 08:19:01,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074511987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185346786] [2022-01-31 08:19:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:01,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:01,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:19:01,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:19:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:19:02,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:19:02,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:19:02,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185346786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:19:02,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:19:02,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-31 08:19:02,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849369289] [2022-01-31 08:19:02,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:19:02,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:19:02,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:19:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:19:02,129 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:02,142 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-01-31 08:19:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:19:02,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-01-31 08:19:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:02,145 INFO L225 Difference]: With dead ends: 36 [2022-01-31 08:19:02,145 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:19:02,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:19:02,147 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:02,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 62 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:19:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:19:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 08:19:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:19:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-01-31 08:19:02,155 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2022-01-31 08:19:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:02,156 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-01-31 08:19:02,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-01-31 08:19:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 08:19:02,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:02,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:02,190 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 08:19:02,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:02,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash -703261590, now seen corresponding path program 1 times [2022-01-31 08:19:02,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577629286] [2022-01-31 08:19:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:02,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,466 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 08:19:02,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577629286] [2022-01-31 08:19:02,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577629286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698730558] [2022-01-31 08:19:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:02,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:02,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:02,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:19:02,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:19:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:19:02,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:19:02,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:19:02,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698730558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:19:02,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:19:02,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-01-31 08:19:02,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184455005] [2022-01-31 08:19:02,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:19:02,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:19:02,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:19:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:19:02,636 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:02,657 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-01-31 08:19:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:19:02,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-01-31 08:19:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:02,659 INFO L225 Difference]: With dead ends: 33 [2022-01-31 08:19:02,659 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:19:02,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:19:02,660 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:02,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:19:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:19:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 08:19:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:19:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 08:19:02,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-01-31 08:19:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:02,665 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 08:19:02,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:19:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 08:19:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 08:19:02,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:02,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:02,696 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 08:19:02,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:19:02,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash -72993083, now seen corresponding path program 1 times [2022-01-31 08:19:02,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:02,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131787332] [2022-01-31 08:19:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:02,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:19:02,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:02,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131787332] [2022-01-31 08:19:02,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131787332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:02,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974037826] [2022-01-31 08:19:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:02,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:02,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:02,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:19:03,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:19:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 08:19:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:19:03,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:19:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:19:03,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974037826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:19:03,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:19:03,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-01-31 08:19:03,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506968900] [2022-01-31 08:19:03,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:19:03,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 08:19:03,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 08:19:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:19:03,367 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 08:19:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:03,686 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-01-31 08:19:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:19:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-01-31 08:19:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:03,688 INFO L225 Difference]: With dead ends: 55 [2022-01-31 08:19:03,688 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 08:19:03,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-01-31 08:19:03,689 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:03,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 29 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:19:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 08:19:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-01-31 08:19:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:19:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 08:19:03,699 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-01-31 08:19:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:03,700 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 08:19:03,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 08:19:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 08:19:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:19:03,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:03,701 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:03,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:19:03,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:03,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash -608774993, now seen corresponding path program 2 times [2022-01-31 08:19:03,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:03,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316009296] [2022-01-31 08:19:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:03,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:03,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:04,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:19:04,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:04,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316009296] [2022-01-31 08:19:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316009296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:04,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085014731] [2022-01-31 08:19:04,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:19:04,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:04,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:04,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:19:04,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:19:04,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:19:04,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:19:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:19:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:19:04,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:19:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 08:19:04,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085014731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:19:04,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:19:04,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-01-31 08:19:04,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403006545] [2022-01-31 08:19:04,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:19:04,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:19:04,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:04,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:19:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:19:04,545 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 08:19:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:05,052 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-01-31 08:19:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 08:19:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-01-31 08:19:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:05,054 INFO L225 Difference]: With dead ends: 75 [2022-01-31 08:19:05,054 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 08:19:05,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 08:19:05,055 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:05,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 33 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:19:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 08:19:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2022-01-31 08:19:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:19:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-01-31 08:19:05,061 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 34 [2022-01-31 08:19:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:05,061 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-01-31 08:19:05,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 08:19:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-01-31 08:19:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 08:19:05,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:05,062 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:05,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:19:05,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:05,280 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash 911887384, now seen corresponding path program 3 times [2022-01-31 08:19:05,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:05,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947199612] [2022-01-31 08:19:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:05,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:05,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:05,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-31 08:19:05,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947199612] [2022-01-31 08:19:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947199612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385794111] [2022-01-31 08:19:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:19:05,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:05,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:19:05,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:19:05,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:19:05,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:19:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 08:19:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:05,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:19:05,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:19:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-01-31 08:19:05,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:19:05,939 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-01-31 08:19:05,940 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 28 treesize of output 21 [2022-01-31 08:19:05,946 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 08:19:05,946 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 24 treesize of output 12 [2022-01-31 08:19:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-01-31 08:19:05,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385794111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:19:05,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:19:05,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 19 [2022-01-31 08:19:05,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750287135] [2022-01-31 08:19:05,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:19:05,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:19:05,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:05,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:19:05,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:19:05,994 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:19:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:06,438 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2022-01-31 08:19:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 08:19:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-01-31 08:19:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:06,439 INFO L225 Difference]: With dead ends: 83 [2022-01-31 08:19:06,439 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 08:19:06,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-01-31 08:19:06,441 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:06,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 41 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:19:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 08:19:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2022-01-31 08:19:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 55 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 08:19:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-01-31 08:19:06,447 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 49 [2022-01-31 08:19:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:06,447 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-01-31 08:19:06,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 08:19:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-01-31 08:19:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 08:19:06,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:06,452 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:06,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:19:06,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:06,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1762144394, now seen corresponding path program 1 times [2022-01-31 08:19:06,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339495807] [2022-01-31 08:19:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:06,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:06,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:06,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-01-31 08:19:06,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339495807] [2022-01-31 08:19:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339495807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:19:06,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:19:06,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:19:06,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182535567] [2022-01-31 08:19:06,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:19:06,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:19:06,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:06,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:19:06,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:19:06,817 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:19:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:06,874 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-01-31 08:19:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:19:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-01-31 08:19:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:06,878 INFO L225 Difference]: With dead ends: 64 [2022-01-31 08:19:06,878 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 08:19:06,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:19:06,879 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:06,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:19:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 08:19:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 08:19:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:19:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 08:19:06,889 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2022-01-31 08:19:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:06,890 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 08:19:06,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:19:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 08:19:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 08:19:06,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:06,891 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:06,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 08:19:06,891 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1344261893, now seen corresponding path program 1 times [2022-01-31 08:19:06,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:06,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364890811] [2022-01-31 08:19:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:06,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:06,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:07,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 08:19:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-01-31 08:19:07,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:07,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364890811] [2022-01-31 08:19:07,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364890811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:07,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124843323] [2022-01-31 08:19:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:07,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:07,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:07,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:19:07,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:19:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:19:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:19:07,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:19:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 08:19:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124843323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:19:07,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:19:07,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 33 [2022-01-31 08:19:07,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566020286] [2022-01-31 08:19:07,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:19:07,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 08:19:07,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 08:19:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 08:19:07,961 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 31 states have internal predecessors, (87), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:19:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:08,788 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-01-31 08:19:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:19:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 31 states have internal predecessors, (87), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-01-31 08:19:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:08,792 INFO L225 Difference]: With dead ends: 119 [2022-01-31 08:19:08,792 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 08:19:08,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1026, Invalid=3006, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 08:19:08,796 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 193 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:08,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 32 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:19:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 08:19:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2022-01-31 08:19:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:19:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-01-31 08:19:08,814 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 61 [2022-01-31 08:19:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:08,815 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-01-31 08:19:08,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 31 states have internal predecessors, (87), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:19:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-01-31 08:19:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 08:19:08,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:08,816 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:08,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:19:09,017 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 08:19:09,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash -96822836, now seen corresponding path program 2 times [2022-01-31 08:19:09,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:09,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700130074] [2022-01-31 08:19:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:09,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:09,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:09,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 08:19:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2022-01-31 08:19:09,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:09,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700130074] [2022-01-31 08:19:09,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700130074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:09,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512304347] [2022-01-31 08:19:09,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:19:09,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:09,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:19:09,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:19:09,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:19:09,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:19:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 08:19:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:19:10,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:19:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 08:19:11,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512304347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:19:11,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:19:11,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26, 26] total 58 [2022-01-31 08:19:11,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250009923] [2022-01-31 08:19:11,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:19:11,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 08:19:11,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 08:19:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1210, Invalid=2096, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 08:19:11,433 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 58 states, 58 states have (on average 2.3793103448275863) internal successors, (138), 56 states have internal predecessors, (138), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:19:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:13,344 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2022-01-31 08:19:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 08:19:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3793103448275863) internal successors, (138), 56 states have internal predecessors, (138), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 88 [2022-01-31 08:19:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:13,346 INFO L225 Difference]: With dead ends: 175 [2022-01-31 08:19:13,346 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 08:19:13,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3723, Invalid=9159, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 08:19:13,351 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 243 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:13,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 38 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 08:19:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 08:19:13,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2022-01-31 08:19:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 133 states have internal predecessors, (135), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:19:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-01-31 08:19:13,357 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 88 [2022-01-31 08:19:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:13,358 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-01-31 08:19:13,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3793103448275863) internal successors, (138), 56 states have internal predecessors, (138), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:19:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-01-31 08:19:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 08:19:13,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:19:13,360 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:19:13,391 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 08:19:13,575 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 08:19:13,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:19:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:19:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1609628455, now seen corresponding path program 3 times [2022-01-31 08:19:13,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:19:13,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229171692] [2022-01-31 08:19:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:19:13,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:19:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:13,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:19:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:13,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 08:19:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:13,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 08:19:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:19:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2022-01-31 08:19:13,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:19:13,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229171692] [2022-01-31 08:19:13,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229171692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:19:13,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077668360] [2022-01-31 08:19:13,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:19:13,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:19:13,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:19:13,864 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 08:19:13,894 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 08:19:14,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:19:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:19:14,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 08:19:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:19:14,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 08:19:15,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:19:15,009 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 24 treesize of output 24 [2022-01-31 08:19:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2022-01-31 08:19:15,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:19:15,622 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 50 treesize of output 42 [2022-01-31 08:19:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 2 proven. 107 refuted. 0 times theorem prover too weak. 2063 trivial. 0 not checked. [2022-01-31 08:19:16,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077668360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:19:16,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:19:16,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-01-31 08:19:16,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479875559] [2022-01-31 08:19:16,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:19:16,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:19:16,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:19:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:19:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:19:16,922 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:19:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:19:17,334 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2022-01-31 08:19:17,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 08:19:17,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 139 [2022-01-31 08:19:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:19:17,335 INFO L225 Difference]: With dead ends: 126 [2022-01-31 08:19:17,335 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 08:19:17,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 08:19:17,336 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:19:17,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 50 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-01-31 08:19:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 08:19:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 08:19:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 08:19:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 08:19:17,338 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2022-01-31 08:19:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:19:17,338 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 08:19:17,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:19:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 08:19:17,338 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 08:19:17,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 08:19:17,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 08:19:17,566 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 08:19:17,569 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1] [2022-01-31 08:19:17,570 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 08:19:17,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:19:17 BasicIcfg [2022-01-31 08:19:17,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 08:19:17,573 INFO L158 Benchmark]: Toolchain (without parser) took 17357.00ms. Allocated memory was 164.6MB in the beginning and 298.8MB in the end (delta: 134.2MB). Free memory was 115.7MB in the beginning and 214.8MB in the end (delta: -99.1MB). Peak memory consumption was 36.7MB. Max. memory is 8.0GB. [2022-01-31 08:19:17,573 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 164.6MB. Free memory is still 132.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 08:19:17,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.65ms. Allocated memory is still 164.6MB. Free memory was 115.5MB in the beginning and 141.4MB in the end (delta: -25.9MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-01-31 08:19:17,574 INFO L158 Benchmark]: Boogie Preprocessor took 30.15ms. Allocated memory is still 164.6MB. Free memory was 141.4MB in the beginning and 139.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 08:19:17,574 INFO L158 Benchmark]: RCFGBuilder took 402.99ms. Allocated memory is still 164.6MB. Free memory was 139.9MB in the beginning and 127.8MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 08:19:17,574 INFO L158 Benchmark]: IcfgTransformer took 20.78ms. Allocated memory is still 164.6MB. Free memory was 127.8MB in the beginning and 126.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 08:19:17,575 INFO L158 Benchmark]: TraceAbstraction took 16657.74ms. Allocated memory was 164.6MB in the beginning and 298.8MB in the end (delta: 134.2MB). Free memory was 125.7MB in the beginning and 214.8MB in the end (delta: -89.1MB). Peak memory consumption was 46.7MB. Max. memory is 8.0GB. [2022-01-31 08:19:17,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 164.6MB. Free memory is still 132.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.65ms. Allocated memory is still 164.6MB. Free memory was 115.5MB in the beginning and 141.4MB in the end (delta: -25.9MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.15ms. Allocated memory is still 164.6MB. Free memory was 141.4MB in the beginning and 139.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 402.99ms. Allocated memory is still 164.6MB. Free memory was 139.9MB in the beginning and 127.8MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.78ms. Allocated memory is still 164.6MB. Free memory was 127.8MB in the beginning and 126.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 16657.74ms. Allocated memory was 164.6MB in the beginning and 298.8MB in the end (delta: 134.2MB). Free memory was 125.7MB in the beginning and 214.8MB in the end (delta: -89.1MB). Peak memory consumption was 46.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.6s, OverallIterations: 11, TraceHistogramMax: 46, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 880 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 866 mSDsluCounter, 450 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 50 IncrementalHoareTripleChecker+Unchecked, 208 mSDsCounter, 502 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1822 IncrementalHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 502 mSolverCounterUnsat, 242 mSDtfsCounter, 1822 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1104 GetRequests, 781 SyntacticMatches, 3 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3656 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=10, InterpolantAutomatonStates: 191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 115 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 979 NumberOfCodeBlocks, 860 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1350 ConstructedInterpolants, 41 QuantifiedInterpolants, 7952 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2119 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 25 InterpolantComputations, 5 PerfectInterpolantSequences, 7450/9002 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 08:19:17,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...