./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:36:57,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:36:57,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:36:57,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:36:57,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:36:57,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:36:57,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:36:57,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:36:57,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:36:57,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:36:57,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:36:57,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:36:57,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:36:57,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:36:57,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:36:57,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:36:57,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:36:57,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:36:57,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:36:57,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:36:57,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:36:57,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:36:57,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:36:57,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:36:57,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:36:57,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:36:57,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:36:57,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:36:57,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:36:57,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:36:57,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:36:57,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:36:57,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:36:57,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:36:57,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:36:57,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:36:57,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:36:57,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:36:57,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:36:57,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:36:57,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:36:57,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:36:57,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:36:57,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:36:57,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:36:57,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:36:57,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:36:57,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:36:57,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:36:57,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:36:57,526 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:36:57,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:36:57,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:36:57,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:36:57,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:36:57,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:36:57,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:36:57,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:36:57,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:36:57,528 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:36:57,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:36:57,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:36:57,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:36:57,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:36:57,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:36:57,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:36:57,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:36:57,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:36:57,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:36:57,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:36:57,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:36:57,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:36:57,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:36:57,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:36:57,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:36:57,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:36:57,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 [2021-12-14 13:36:57,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:36:57,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:36:57,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:36:57,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:36:57,795 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:36:57,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-12-14 13:36:57,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d882f7f20/d335d2fadbfb4c1b988fa17274f59221/FLAG1be375809 [2021-12-14 13:36:58,496 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:36:58,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-12-14 13:36:58,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d882f7f20/d335d2fadbfb4c1b988fa17274f59221/FLAG1be375809 [2021-12-14 13:36:58,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d882f7f20/d335d2fadbfb4c1b988fa17274f59221 [2021-12-14 13:36:58,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:36:58,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:36:58,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:36:58,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:36:58,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:36:58,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:36:58" (1/1) ... [2021-12-14 13:36:58,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724b3200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:58, skipping insertion in model container [2021-12-14 13:36:58,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:36:58" (1/1) ... [2021-12-14 13:36:58,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:36:58,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:36:59,110 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-12-14 13:36:59,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:36:59,217 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:36:59,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-12-14 13:36:59,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:36:59,286 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:36:59,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59 WrapperNode [2021-12-14 13:36:59,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:36:59,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:36:59,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:36:59,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:36:59,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,335 INFO L137 Inliner]: procedures = 126, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-14 13:36:59,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:36:59,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:36:59,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:36:59,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:36:59,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:36:59,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:36:59,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:36:59,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:36:59,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (1/1) ... [2021-12-14 13:36:59,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:36:59,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:36:59,393 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) [2021-12-14 13:36:59,400 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 [2021-12-14 13:36:59,425 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2021-12-14 13:36:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2021-12-14 13:36:59,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:36:59,426 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-14 13:36:59,426 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-14 13:36:59,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 13:36:59,426 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-12-14 13:36:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-12-14 13:36:59,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:36:59,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:36:59,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:36:59,500 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:36:59,502 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:36:59,693 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:36:59,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:36:59,701 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 13:36:59,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:59 BoogieIcfgContainer [2021-12-14 13:36:59,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:36:59,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:36:59,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:36:59,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:36:59,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:36:58" (1/3) ... [2021-12-14 13:36:59,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5406a910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:36:59, skipping insertion in model container [2021-12-14 13:36:59,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:59" (2/3) ... [2021-12-14 13:36:59,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5406a910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:36:59, skipping insertion in model container [2021-12-14 13:36:59,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:59" (3/3) ... [2021-12-14 13:36:59,710 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2021-12-14 13:36:59,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:36:59,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:36:59,796 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:36:59,806 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-12-14 13:36:59,807 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:36:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:36:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:36:59,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:59,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:59,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 484842023, now seen corresponding path program 1 times [2021-12-14 13:36:59,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:59,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145592954] [2021-12-14 13:36:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:59,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:00,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145592954] [2021-12-14 13:37:00,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145592954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:00,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:00,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 13:37:00,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034869026] [2021-12-14 13:37:00,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:00,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:37:00,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:37:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:37:00,100 INFO L87 Difference]: Start difference. First operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:00,189 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-12-14 13:37:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:37:00,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 13:37:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:00,198 INFO L225 Difference]: With dead ends: 68 [2021-12-14 13:37:00,206 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 13:37:00,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:37:00,213 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:00,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 13:37:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-14 13:37:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 13:37:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-14 13:37:00,257 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 7 [2021-12-14 13:37:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:00,257 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-14 13:37:00,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:37:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-14 13:37:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 13:37:00,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:00,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:00,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:37:00,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1134155612, now seen corresponding path program 1 times [2021-12-14 13:37:00,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:00,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271407089] [2021-12-14 13:37:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:00,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:00,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:37:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:00,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 13:37:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:37:00,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271407089] [2021-12-14 13:37:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271407089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877101941] [2021-12-14 13:37:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:00,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:00,543 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) [2021-12-14 13:37:00,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:37:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 13:37:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:37:00,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:37:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:37:01,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877101941] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:37:01,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:37:01,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-14 13:37:01,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048139257] [2021-12-14 13:37:01,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:37:01,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:37:01,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:37:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:37:01,061 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:37:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:01,135 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-12-14 13:37:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 13:37:01,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-14 13:37:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:01,138 INFO L225 Difference]: With dead ends: 53 [2021-12-14 13:37:01,138 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 13:37:01,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:37:01,140 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:01,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 13:37:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-14 13:37:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-14 13:37:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-14 13:37:01,157 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2021-12-14 13:37:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:01,157 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-14 13:37:01,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:37:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-14 13:37:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 13:37:01,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:01,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:01,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:37:01,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:01,383 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1951804062, now seen corresponding path program 1 times [2021-12-14 13:37:01,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:01,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39252454] [2021-12-14 13:37:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:01,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:01,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:37:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:01,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 13:37:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:37:01,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:01,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39252454] [2021-12-14 13:37:01,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39252454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:01,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:37:01,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 13:37:01,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551857528] [2021-12-14 13:37:01,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:01,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:37:01,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:37:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:37:01,492 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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) [2021-12-14 13:37:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:01,560 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-12-14 13:37:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 13:37:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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 26 [2021-12-14 13:37:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:01,562 INFO L225 Difference]: With dead ends: 51 [2021-12-14 13:37:01,562 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 13:37:01,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:37:01,563 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:01,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:37:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 13:37:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-14 13:37:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 13:37:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-14 13:37:01,569 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 26 [2021-12-14 13:37:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:01,570 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-14 13:37:01,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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) [2021-12-14 13:37:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-14 13:37:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 13:37:01,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:01,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:01,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 13:37:01,572 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1250739484, now seen corresponding path program 1 times [2021-12-14 13:37:01,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:01,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060684317] [2021-12-14 13:37:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:01,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:01,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:37:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:01,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 13:37:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:37:01,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060684317] [2021-12-14 13:37:01,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060684317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388804022] [2021-12-14 13:37:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:01,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:01,770 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) [2021-12-14 13:37:01,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:37:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 13:37:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 13:37:02,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:37:02,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388804022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:37:02,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 13:37:02,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2021-12-14 13:37:02,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369609538] [2021-12-14 13:37:02,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:37:02,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 13:37:02,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 13:37:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-14 13:37:02,150 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:37:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:02,467 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-14 13:37:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 13:37:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-14 13:37:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:02,473 INFO L225 Difference]: With dead ends: 57 [2021-12-14 13:37:02,473 INFO L226 Difference]: Without dead ends: 54 [2021-12-14 13:37:02,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-12-14 13:37:02,474 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:02,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 135 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:37:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-14 13:37:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-14 13:37:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-14 13:37:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-12-14 13:37:02,482 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 26 [2021-12-14 13:37:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:02,483 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-12-14 13:37:02,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 13:37:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-12-14 13:37:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 13:37:02,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:02,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:02,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:37:02,707 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 [2021-12-14 13:37:02,707 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash 937918941, now seen corresponding path program 1 times [2021-12-14 13:37:02,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:02,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595578595] [2021-12-14 13:37:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:02,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:02,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:37:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:02,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 13:37:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:02,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 13:37:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:37:02,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595578595] [2021-12-14 13:37:02,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595578595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:02,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116176516] [2021-12-14 13:37:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:02,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:02,929 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) [2021-12-14 13:37:02,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:37:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:03,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 13:37:03,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:03,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:37:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:03,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116176516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:37:03,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:37:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 25 [2021-12-14 13:37:03,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916111424] [2021-12-14 13:37:03,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:37:03,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 13:37:03,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 13:37:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-12-14 13:37:03,379 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 13:37:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:03,897 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-12-14 13:37:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 13:37:03,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-12-14 13:37:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:03,899 INFO L225 Difference]: With dead ends: 64 [2021-12-14 13:37:03,899 INFO L226 Difference]: Without dead ends: 60 [2021-12-14 13:37:03,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 13:37:03,901 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:03,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 111 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:37:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-14 13:37:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-14 13:37:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-14 13:37:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-14 13:37:03,913 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 33 [2021-12-14 13:37:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:03,914 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-14 13:37:03,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-14 13:37:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-14 13:37:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 13:37:03,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:03,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:03,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:37:04,123 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 [2021-12-14 13:37:04,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:04,124 INFO L85 PathProgramCache]: Analyzing trace with hash 128572315, now seen corresponding path program 1 times [2021-12-14 13:37:04,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:04,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981144391] [2021-12-14 13:37:04,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:04,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:04,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:37:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:04,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 13:37:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:04,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 13:37:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:37:04,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981144391] [2021-12-14 13:37:04,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981144391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53663486] [2021-12-14 13:37:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:04,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:04,287 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) [2021-12-14 13:37:04,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:37:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 13:37:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:04,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:37:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:37:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53663486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:37:04,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:37:04,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2021-12-14 13:37:04,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321819957] [2021-12-14 13:37:04,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:37:04,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 13:37:04,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 13:37:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 13:37:04,978 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-14 13:37:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:05,582 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-12-14 13:37:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 13:37:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2021-12-14 13:37:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:05,587 INFO L225 Difference]: With dead ends: 78 [2021-12-14 13:37:05,587 INFO L226 Difference]: Without dead ends: 68 [2021-12-14 13:37:05,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2021-12-14 13:37:05,591 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 171 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:05,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 124 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:37:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-14 13:37:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-12-14 13:37:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-14 13:37:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-14 13:37:05,598 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 33 [2021-12-14 13:37:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:05,599 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-14 13:37:05,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-14 13:37:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-14 13:37:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 13:37:05,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:05,600 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:05,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:37:05,803 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 [2021-12-14 13:37:05,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:05,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1975182920, now seen corresponding path program 1 times [2021-12-14 13:37:05,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:05,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081752568] [2021-12-14 13:37:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:05,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:05,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:37:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:05,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 13:37:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:05,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 13:37:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:05,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 13:37:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 13:37:05,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081752568] [2021-12-14 13:37:05,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081752568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:05,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723622316] [2021-12-14 13:37:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:05,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:05,935 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) [2021-12-14 13:37:05,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:37:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 13:37:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:37:06,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:37:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:37:06,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723622316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:37:06,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:37:06,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 30 [2021-12-14 13:37:06,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526476035] [2021-12-14 13:37:06,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:37:06,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 13:37:06,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 13:37:06,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-12-14 13:37:06,516 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-14 13:37:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:07,248 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-12-14 13:37:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 13:37:07,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 43 [2021-12-14 13:37:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:07,250 INFO L225 Difference]: With dead ends: 82 [2021-12-14 13:37:07,250 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 13:37:07,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=2096, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 13:37:07,251 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:07,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 192 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 13:37:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 13:37:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-12-14 13:37:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-14 13:37:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-14 13:37:07,258 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 43 [2021-12-14 13:37:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:07,258 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-14 13:37:07,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-14 13:37:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-14 13:37:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 13:37:07,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:07,259 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1] [2021-12-14 13:37:07,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:37:07,482 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 [2021-12-14 13:37:07,482 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:07,483 INFO L85 PathProgramCache]: Analyzing trace with hash 156287564, now seen corresponding path program 1 times [2021-12-14 13:37:07,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:07,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621180249] [2021-12-14 13:37:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:07,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:07,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:37:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:07,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 13:37:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:07,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 13:37:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:07,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 13:37:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 13:37:07,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:37:07,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621180249] [2021-12-14 13:37:07,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621180249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:37:07,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102497581] [2021-12-14 13:37:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:07,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:37:07,592 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) [2021-12-14 13:37:07,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:37:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:37:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 13:37:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:37:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 13:37:07,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:37:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 13:37:07,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102497581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:37:07,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:37:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 16 [2021-12-14 13:37:07,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520643699] [2021-12-14 13:37:07,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:37:07,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 13:37:07,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:37:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 13:37:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-14 13:37:07,955 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 13:37:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:37:08,170 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-14 13:37:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:37:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-12-14 13:37:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:37:08,171 INFO L225 Difference]: With dead ends: 60 [2021-12-14 13:37:08,171 INFO L226 Difference]: Without dead ends: 53 [2021-12-14 13:37:08,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-14 13:37:08,172 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:37:08,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:37:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-14 13:37:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-14 13:37:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-14 13:37:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-12-14 13:37:08,185 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 43 [2021-12-14 13:37:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:37:08,185 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-12-14 13:37:08,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 13:37:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-12-14 13:37:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 13:37:08,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:37:08,191 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 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, 1, 1] [2021-12-14 13:37:08,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 13:37:08,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:37:08,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:37:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:37:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2126992523, now seen corresponding path program 1 times [2021-12-14 13:37:08,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:37:08,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007234427] [2021-12-14 13:37:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:37:08,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:37:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:37:08,436 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 13:37:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:37:08,490 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 13:37:08,490 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 13:37:08,491 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 13:37:08,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 13:37:08,496 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:37:08,499 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 13:37:08,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:37:08 BoogieIcfgContainer [2021-12-14 13:37:08,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 13:37:08,570 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 13:37:08,570 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 13:37:08,570 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 13:37:08,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:59" (3/4) ... [2021-12-14 13:37:08,572 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-14 13:37:08,624 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 13:37:08,626 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 13:37:08,627 INFO L158 Benchmark]: Toolchain (without parser) took 9718.30ms. Allocated memory was 92.3MB in the beginning and 134.2MB in the end (delta: 41.9MB). Free memory was 61.1MB in the beginning and 46.1MB in the end (delta: 15.1MB). Peak memory consumption was 56.3MB. Max. memory is 16.1GB. [2021-12-14 13:37:08,628 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 49.7MB in the beginning and 49.6MB in the end (delta: 45.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:37:08,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 377.17ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 60.8MB in the beginning and 82.2MB in the end (delta: -21.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:37:08,628 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.77ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 80.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:37:08,629 INFO L158 Benchmark]: Boogie Preprocessor took 27.37ms. Allocated memory is still 111.1MB. Free memory was 80.7MB in the beginning and 79.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:37:08,629 INFO L158 Benchmark]: RCFGBuilder took 338.63ms. Allocated memory is still 111.1MB. Free memory was 79.2MB in the beginning and 68.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 13:37:08,629 INFO L158 Benchmark]: TraceAbstraction took 8864.77ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 67.5MB in the beginning and 51.3MB in the end (delta: 16.2MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. [2021-12-14 13:37:08,630 INFO L158 Benchmark]: Witness Printer took 56.80ms. Allocated memory is still 134.2MB. Free memory was 51.3MB in the beginning and 46.1MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-14 13:37:08,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 49.7MB in the beginning and 49.6MB in the end (delta: 45.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 377.17ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 60.8MB in the beginning and 82.2MB in the end (delta: -21.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.77ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 80.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.37ms. Allocated memory is still 111.1MB. Free memory was 80.7MB in the beginning and 79.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 338.63ms. Allocated memory is still 111.1MB. Free memory was 79.2MB in the beginning and 68.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8864.77ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 67.5MB in the beginning and 51.3MB in the end (delta: 16.2MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. * Witness Printer took 56.80ms. Allocated memory is still 134.2MB. Free memory was 51.3MB in the beginning and 46.1MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L546] struct list_head *dev1, *dev2; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L547] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L547] RET, EXPR my_malloc(sizeof(*dev1)) VAL [elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, my_malloc(sizeof(*dev1))={0:1}] [L547] dev1 = my_malloc(sizeof(*dev1)) [L548] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L548] RET, EXPR my_malloc(sizeof(*dev2)) VAL [dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, my_malloc(sizeof(*dev2))={0:2}] [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}] [L550] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)=0, \old(elem)=0, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L550] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L551] CALL list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=2, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=2, \old(elem)=0, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)=2, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L551] RET list_add(dev1, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L552] CALL list_del(dev2) [L541] COND FALSE !(entry==elem) VAL [elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L552] RET list_del(dev2) [L553] CALL list_add(dev2, &head) VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=1, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L553] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L554] CALL list_add(dev1, &head) VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L536] CALL __blast_assert () VAL [\old(elem)=0, \old(elem)=1, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L6] reach_error() VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.7s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 488 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 488 mSDsluCounter, 1060 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 810 mSDsCounter, 313 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2861 IncrementalHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 313 mSolverCounterUnsat, 250 mSDtfsCounter, 2861 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 552 GetRequests, 358 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 94, 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, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 491 NumberOfCodeBlocks, 491 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 600 ConstructedInterpolants, 0 QuantifiedInterpolants, 2173 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1223 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 117/198 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 RESULT: Ultimate proved your program to be incorrect! [2021-12-14 13:37:08,661 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE