./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 7e1ff0e6 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-?-7e1ff0e [2023-02-14 22:42:33,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:42:33,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:42:33,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:42:33,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:42:33,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:42:33,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:42:33,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:42:33,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:42:33,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:42:33,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:42:33,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:42:33,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:42:33,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:42:33,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:42:33,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:42:33,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:42:33,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:42:33,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:42:33,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:42:33,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:42:33,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:42:33,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:42:33,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:42:33,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:42:33,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:42:33,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:42:33,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:42:33,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:42:33,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:42:33,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:42:33,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:42:33,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:42:33,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:42:33,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:42:33,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:42:33,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:42:33,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:42:33,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:42:33,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:42:33,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:42:33,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:42:33,529 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:42:33,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:42:33,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:42:33,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:42:33,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:42:33,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:42:33,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:42:33,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:42:33,532 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:42:33,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:42:33,533 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:42:33,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:42:33,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:42:33,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:42:33,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:42:33,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:42:33,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:42:33,534 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:42:33,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:42:33,534 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:42:33,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:42:33,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:42:33,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:42:33,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:42:33,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:42:33,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:42:33,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:42:33,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:42:33,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:42:33,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:42:33,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:42:33,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:42:33,536 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:42:33,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:42:33,537 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:42:33,537 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 [2023-02-14 22:42:33,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:42:33,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:42:33,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:42:33,721 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:42:33,721 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:42:33,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2023-02-14 22:42:34,661 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:42:34,947 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:42:34,947 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2023-02-14 22:42:34,960 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c33d6d16/784f2b9c1c074f8f826ba7301852897c/FLAG0210ff265 [2023-02-14 22:42:34,978 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c33d6d16/784f2b9c1c074f8f826ba7301852897c [2023-02-14 22:42:34,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:42:34,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:42:34,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:42:34,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:42:34,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:42:35,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:42:34" (1/1) ... [2023-02-14 22:42:35,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116817c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35, skipping insertion in model container [2023-02-14 22:42:35,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:42:34" (1/1) ... [2023-02-14 22:42:35,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:42:35,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:42:35,160 WARN L237 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] [2023-02-14 22:42:35,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:42:35,284 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:42:35,292 WARN L237 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] [2023-02-14 22:42:35,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:42:35,342 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:42:35,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35 WrapperNode [2023-02-14 22:42:35,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:42:35,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:42:35,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:42:35,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:42:35,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,383 INFO L138 Inliner]: procedures = 126, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-02-14 22:42:35,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:42:35,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:42:35,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:42:35,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:42:35,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,412 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:42:35,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:42:35,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:42:35,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:42:35,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (1/1) ... [2023-02-14 22:42:35,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:42:35,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:42:35,446 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) [2023-02-14 22:42:35,451 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 [2023-02-14 22:42:35,476 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2023-02-14 22:42:35,476 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2023-02-14 22:42:35,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:42:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2023-02-14 22:42:35,477 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2023-02-14 22:42:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 22:42:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2023-02-14 22:42:35,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2023-02-14 22:42:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:42:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:42:35,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:42:35,545 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:42:35,546 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:42:35,726 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:42:35,731 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:42:35,731 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 22:42:35,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:42:35 BoogieIcfgContainer [2023-02-14 22:42:35,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:42:35,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:42:35,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:42:35,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:42:35,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:42:34" (1/3) ... [2023-02-14 22:42:35,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d83ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:42:35, skipping insertion in model container [2023-02-14 22:42:35,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:42:35" (2/3) ... [2023-02-14 22:42:35,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d83ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:42:35, skipping insertion in model container [2023-02-14 22:42:35,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:42:35" (3/3) ... [2023-02-14 22:42:35,753 INFO L112 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2023-02-14 22:42:35,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:42:35,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:42:35,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:42:35,832 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41ea8738, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:42:35,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:42:35,835 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) [2023-02-14 22:42:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 22:42:35,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:35,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:42:35,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash 484842023, now seen corresponding path program 1 times [2023-02-14 22:42:35,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:35,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028281545] [2023-02-14 22:42:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:35,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:42:36,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:36,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028281545] [2023-02-14 22:42:36,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028281545] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:42:36,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:42:36,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:42:36,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275572988] [2023-02-14 22:42:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:42:36,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:42:36,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:36,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:42:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:42:36,023 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) [2023-02-14 22:42:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:36,071 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2023-02-14 22:42:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:42:36,073 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 [2023-02-14 22:42:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:36,086 INFO L225 Difference]: With dead ends: 68 [2023-02-14 22:42:36,087 INFO L226 Difference]: Without dead ends: 30 [2023-02-14 22:42:36,089 INFO L412 NwaCegarLoop]: 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 [2023-02-14 22:42:36,112 INFO L413 NwaCegarLoop]: 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 [2023-02-14 22:42:36,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:42:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-14 22:42:36,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-14 22:42:36,144 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) [2023-02-14 22:42:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-02-14 22:42:36,146 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 7 [2023-02-14 22:42:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:36,146 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-02-14 22:42:36,146 INFO L496 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) [2023-02-14 22:42:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-02-14 22:42:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 22:42:36,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:36,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:42:36,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 22:42:36,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1134155612, now seen corresponding path program 1 times [2023-02-14 22:42:36,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:36,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251930912] [2023-02-14 22:42:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:36,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:36,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:42:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:36,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 22:42:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:42:36,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251930912] [2023-02-14 22:42:36,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251930912] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:42:36,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446691901] [2023-02-14 22:42:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:36,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:36,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:42:36,370 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) [2023-02-14 22:42:36,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:42:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 22:42:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:42:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:42:36,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:42:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:42:36,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446691901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:42:36,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:42:36,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-02-14 22:42:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818513082] [2023-02-14 22:42:36,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:42:36,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:42:36,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:36,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:42:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:42:36,613 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) [2023-02-14 22:42:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:36,717 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2023-02-14 22:42:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:42:36,717 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 [2023-02-14 22:42:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:36,724 INFO L225 Difference]: With dead ends: 53 [2023-02-14 22:42:36,724 INFO L226 Difference]: Without dead ends: 33 [2023-02-14 22:42:36,725 INFO L412 NwaCegarLoop]: 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 [2023-02-14 22:42:36,726 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:42:36,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:42:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-14 22:42:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-14 22:42:36,736 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) [2023-02-14 22:42:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-02-14 22:42:36,737 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2023-02-14 22:42:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:36,738 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-02-14 22:42:36,738 INFO L496 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) [2023-02-14 22:42:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-02-14 22:42:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 22:42:36,739 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:36,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:42:36,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 22:42:36,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:36,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1951804062, now seen corresponding path program 1 times [2023-02-14 22:42:36,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:36,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674055310] [2023-02-14 22:42:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:37,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:42:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:37,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 22:42:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:42:37,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:37,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674055310] [2023-02-14 22:42:37,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674055310] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:42:37,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:42:37,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:42:37,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413224059] [2023-02-14 22:42:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:42:37,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:42:37,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:42:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:42:37,176 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) [2023-02-14 22:42:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:37,253 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-02-14 22:42:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:42:37,253 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 [2023-02-14 22:42:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:37,255 INFO L225 Difference]: With dead ends: 51 [2023-02-14 22:42:37,255 INFO L226 Difference]: Without dead ends: 30 [2023-02-14 22:42:37,255 INFO L412 NwaCegarLoop]: 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 [2023-02-14 22:42:37,258 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:42:37,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:42:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-14 22:42:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-02-14 22:42:37,262 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) [2023-02-14 22:42:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-02-14 22:42:37,263 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 26 [2023-02-14 22:42:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:37,263 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-02-14 22:42:37,263 INFO L496 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) [2023-02-14 22:42:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-02-14 22:42:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 22:42:37,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:37,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:42:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 22:42:37,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1250739484, now seen corresponding path program 1 times [2023-02-14 22:42:37,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:37,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824076050] [2023-02-14 22:42:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:37,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:37,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:42:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:37,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 22:42:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:42:37,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824076050] [2023-02-14 22:42:37,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824076050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:42:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592984315] [2023-02-14 22:42:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:37,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:37,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:42:37,487 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) [2023-02-14 22:42:37,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:42:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 22:42:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:42:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:42:37,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:42:37,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592984315] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:42:37,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:42:37,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2023-02-14 22:42:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908844178] [2023-02-14 22:42:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:42:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 22:42:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 22:42:37,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:42:37,753 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) [2023-02-14 22:42:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:38,017 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2023-02-14 22:42:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 22:42:38,018 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 [2023-02-14 22:42:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:38,019 INFO L225 Difference]: With dead ends: 57 [2023-02-14 22:42:38,019 INFO L226 Difference]: Without dead ends: 54 [2023-02-14 22:42:38,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-02-14 22:42:38,020 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:42:38,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 130 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:42:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-14 22:42:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-14 22:42:38,026 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) [2023-02-14 22:42:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2023-02-14 22:42:38,027 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 26 [2023-02-14 22:42:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:38,027 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2023-02-14 22:42:38,028 INFO L496 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) [2023-02-14 22:42:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2023-02-14 22:42:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 22:42:38,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:38,028 INFO L195 NwaCegarLoop]: 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] [2023-02-14 22:42:38,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 22:42:38,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-14 22:42:38,234 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash 937918941, now seen corresponding path program 1 times [2023-02-14 22:42:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063970944] [2023-02-14 22:42:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:38,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:38,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:42:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 22:42:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:38,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 22:42:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 22:42:38,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063970944] [2023-02-14 22:42:38,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063970944] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:42:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779439892] [2023-02-14 22:42:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:38,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:38,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:42:38,471 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) [2023-02-14 22:42:38,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:42:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 22:42:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:42:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:42:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:42:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:42:38,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779439892] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:42:38,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:42:38,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 25 [2023-02-14 22:42:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469228983] [2023-02-14 22:42:38,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:42:38,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 22:42:38,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 22:42:38,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2023-02-14 22:42:38,889 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) [2023-02-14 22:42:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:39,313 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2023-02-14 22:42:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 22:42:39,314 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 [2023-02-14 22:42:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:39,315 INFO L225 Difference]: With dead ends: 64 [2023-02-14 22:42:39,315 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 22:42:39,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 22:42:39,316 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:42:39,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 74 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 22:42:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 22:42:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-02-14 22:42:39,325 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) [2023-02-14 22:42:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-02-14 22:42:39,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 33 [2023-02-14 22:42:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:39,326 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-02-14 22:42:39,326 INFO L496 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) [2023-02-14 22:42:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-02-14 22:42:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 22:42:39,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:39,327 INFO L195 NwaCegarLoop]: 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] [2023-02-14 22:42:39,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 22:42:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:39,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:39,533 INFO L85 PathProgramCache]: Analyzing trace with hash 128572315, now seen corresponding path program 1 times [2023-02-14 22:42:39,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:39,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111382555] [2023-02-14 22:42:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:39,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:42:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:39,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 22:42:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:39,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 22:42:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 22:42:39,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:39,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111382555] [2023-02-14 22:42:39,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111382555] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:42:39,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92586536] [2023-02-14 22:42:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:39,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:39,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:42:39,689 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) [2023-02-14 22:42:39,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:42:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 22:42:39,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:42:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:42:40,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:42:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 22:42:40,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92586536] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:42:40,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:42:40,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2023-02-14 22:42:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028258651] [2023-02-14 22:42:40,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:42:40,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 22:42:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 22:42:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 22:42:40,251 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) [2023-02-14 22:42:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:40,786 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-02-14 22:42:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 22:42:40,788 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 [2023-02-14 22:42:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:40,791 INFO L225 Difference]: With dead ends: 78 [2023-02-14 22:42:40,791 INFO L226 Difference]: Without dead ends: 68 [2023-02-14 22:42:40,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 22:42:40,793 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:42:40,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 106 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:42:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-14 22:42:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2023-02-14 22:42:40,800 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) [2023-02-14 22:42:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2023-02-14 22:42:40,803 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 33 [2023-02-14 22:42:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:40,804 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2023-02-14 22:42:40,804 INFO L496 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) [2023-02-14 22:42:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2023-02-14 22:42:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 22:42:40,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:40,807 INFO L195 NwaCegarLoop]: 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] [2023-02-14 22:42:40,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 22:42:41,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:41,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1975182920, now seen corresponding path program 1 times [2023-02-14 22:42:41,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:41,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184701869] [2023-02-14 22:42:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:42:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:41,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 22:42:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 22:42:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:41,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:42:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 22:42:41,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:41,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184701869] [2023-02-14 22:42:41,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184701869] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:42:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463237819] [2023-02-14 22:42:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:41,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:41,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:42:41,147 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) [2023-02-14 22:42:41,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:42:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:41,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 22:42:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:42:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 22:42:41,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:42:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 22:42:41,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463237819] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:42:41,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:42:41,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 30 [2023-02-14 22:42:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895137929] [2023-02-14 22:42:41,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:42:41,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 22:42:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 22:42:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2023-02-14 22:42:41,743 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) [2023-02-14 22:42:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:42,414 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-02-14 22:42:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 22:42:42,415 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 [2023-02-14 22:42:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:42,416 INFO L225 Difference]: With dead ends: 82 [2023-02-14 22:42:42,416 INFO L226 Difference]: Without dead ends: 64 [2023-02-14 22:42:42,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=2096, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 22:42:42,417 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:42:42,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 134 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:42:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-14 22:42:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2023-02-14 22:42:42,422 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) [2023-02-14 22:42:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-02-14 22:42:42,423 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 43 [2023-02-14 22:42:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:42,423 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-02-14 22:42:42,423 INFO L496 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) [2023-02-14 22:42:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-02-14 22:42:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 22:42:42,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:42,424 INFO L195 NwaCegarLoop]: 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] [2023-02-14 22:42:42,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 22:42:42,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:42,629 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash 156287564, now seen corresponding path program 1 times [2023-02-14 22:42:42,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:42,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826036282] [2023-02-14 22:42:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:42,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:42,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:42:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:42,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 22:42:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 22:42:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:42,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-14 22:42:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 22:42:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:42:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826036282] [2023-02-14 22:42:42,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826036282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:42:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901844807] [2023-02-14 22:42:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:42,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:42,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:42:42,724 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) [2023-02-14 22:42:42,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 22:42:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:42:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 22:42:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:42:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 22:42:42,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:42:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 22:42:42,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901844807] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:42:42,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:42:42,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 16 [2023-02-14 22:42:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844299001] [2023-02-14 22:42:42,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:42:42,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 22:42:42,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:42:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 22:42:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-02-14 22:42:42,959 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) [2023-02-14 22:42:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:42:43,150 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-02-14 22:42:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:42:43,151 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 [2023-02-14 22:42:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:42:43,151 INFO L225 Difference]: With dead ends: 60 [2023-02-14 22:42:43,151 INFO L226 Difference]: Without dead ends: 53 [2023-02-14 22:42:43,152 INFO L412 NwaCegarLoop]: 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 [2023-02-14 22:42:43,152 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:42:43,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:42:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-14 22:42:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-14 22:42:43,157 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) [2023-02-14 22:42:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-02-14 22:42:43,157 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 43 [2023-02-14 22:42:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:42:43,157 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-02-14 22:42:43,158 INFO L496 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) [2023-02-14 22:42:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-02-14 22:42:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 22:42:43,158 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:42:43,159 INFO L195 NwaCegarLoop]: 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] [2023-02-14 22:42:43,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 22:42:43,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:42:43,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:42:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:42:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2126992523, now seen corresponding path program 1 times [2023-02-14 22:42:43,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:42:43,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765781255] [2023-02-14 22:42:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:42:43,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:42:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 22:42:43,372 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 22:42:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 22:42:43,407 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-14 22:42:43,407 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-14 22:42:43,408 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-14 22:42:43,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 22:42:43,411 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:42:43,413 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-14 22:42:43,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:42:43 BoogieIcfgContainer [2023-02-14 22:42:43,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-14 22:42:43,461 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-14 22:42:43,462 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-14 22:42:43,462 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-14 22:42:43,462 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:42:35" (3/4) ... [2023-02-14 22:42:43,463 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-14 22:42:43,508 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-14 22:42:43,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-14 22:42:43,509 INFO L158 Benchmark]: Toolchain (without parser) took 8528.06ms. Allocated memory was 142.6MB in the beginning and 188.7MB in the end (delta: 46.1MB). Free memory was 103.5MB in the beginning and 113.6MB in the end (delta: -10.1MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2023-02-14 22:42:43,509 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 105.8MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 22:42:43,509 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.08ms. Allocated memory is still 142.6MB. Free memory was 103.5MB in the beginning and 86.8MB in the end (delta: 16.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-02-14 22:42:43,509 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.10ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 84.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 22:42:43,510 INFO L158 Benchmark]: Boogie Preprocessor took 32.69ms. Allocated memory is still 142.6MB. Free memory was 84.7MB in the beginning and 83.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 22:42:43,510 INFO L158 Benchmark]: RCFGBuilder took 315.43ms. Allocated memory is still 142.6MB. Free memory was 83.3MB in the beginning and 70.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-14 22:42:43,510 INFO L158 Benchmark]: TraceAbstraction took 7727.37ms. Allocated memory was 142.6MB in the beginning and 188.7MB in the end (delta: 46.1MB). Free memory was 70.0MB in the beginning and 117.8MB in the end (delta: -47.7MB). Peak memory consumption was 861.9kB. Max. memory is 16.1GB. [2023-02-14 22:42:43,510 INFO L158 Benchmark]: Witness Printer took 46.82ms. Allocated memory is still 188.7MB. Free memory was 117.8MB in the beginning and 113.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-14 22:42:43,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 105.8MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 361.08ms. Allocated memory is still 142.6MB. Free memory was 103.5MB in the beginning and 86.8MB in the end (delta: 16.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.10ms. Allocated memory is still 142.6MB. Free memory was 86.8MB in the beginning and 84.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.69ms. Allocated memory is still 142.6MB. Free memory was 84.7MB in the beginning and 83.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 315.43ms. Allocated memory is still 142.6MB. Free memory was 83.3MB in the beginning and 70.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 7727.37ms. Allocated memory was 142.6MB in the beginning and 188.7MB in the end (delta: 46.1MB). Free memory was 70.0MB in the beginning and 117.8MB in the end (delta: -47.7MB). Peak memory consumption was 861.9kB. Max. memory is 16.1GB. * Witness Printer took 46.82ms. Allocated memory is still 188.7MB. Free memory was 117.8MB in the beginning and 113.6MB in the end (delta: 4.2MB). 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)={0:0}, 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)={0:0}, \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)={0:0}, \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)={0:1}, 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)={0:1}, \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)={0:1}, \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)={0:0}, 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)={0:0}, 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)={0:0}, 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)={0:2}, 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)={0:2}, 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)={0:2}, 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)={0:1}, 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)={0:1}, 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)={0:1}, 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)={0:1}, 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)={0:1}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L6] reach_error() VAL [\old(elem)={0:1}, 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: 7.6s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 495 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 495 mSDsluCounter, 859 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 687 mSDsCounter, 262 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3062 IncrementalHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 262 mSolverCounterUnsat, 172 mSDtfsCounter, 3062 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 552 GetRequests, 332 SyntacticMatches, 31 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 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, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 491 NumberOfCodeBlocks, 491 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 600 ConstructedInterpolants, 0 QuantifiedInterpolants, 2154 SizeOfPredicates, 42 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! [2023-02-14 22:42:43,534 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