./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/list-ext3-properties/sll_nondet_insert-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 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:55:50,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:55:50,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:55:50,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:55:50,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:55:50,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:55:50,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:55:50,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:55:50,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:55:50,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:55:50,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:55:50,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:55:50,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:55:50,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:55:50,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:55:50,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:55:50,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:55:50,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:55:50,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:55:50,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:55:50,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:55:50,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:55:50,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:55:50,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:55:50,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:55:50,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:55:50,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:55:50,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:55:50,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:55:50,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:55:50,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:55:50,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:55:50,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:55:50,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:55:50,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:55:50,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:55:50,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:55:50,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:55:50,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:55:50,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:55:50,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:55:50,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:55:50,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:55:50,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:55:50,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:55:50,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:55:50,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:55:50,552 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:55:50,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:55:50,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:55:50,554 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:55:50,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:55:50,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:55:50,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:55:50,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:55:50,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:55:50,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:55:50,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:55:50,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:55:50,556 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:55:50,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:55:50,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:55:50,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:55:50,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:55:50,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:55:50,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:55:50,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:55:50,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:55:50,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:55:50,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:55:50,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:55:50,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:55:50,559 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:55:50,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:55:50,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:55:50,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2021-12-27 23:55:50,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:55:50,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:55:50,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:55:50,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:55:50,903 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:55:50,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-12-27 23:55:50,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebb1fb6a/0d4396ca21504f3b86a97a85d8781497/FLAGceb69e7f4 [2021-12-27 23:55:51,485 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:55:51,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-12-27 23:55:51,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebb1fb6a/0d4396ca21504f3b86a97a85d8781497/FLAGceb69e7f4 [2021-12-27 23:55:51,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ebb1fb6a/0d4396ca21504f3b86a97a85d8781497 [2021-12-27 23:55:51,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:55:51,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:55:51,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:55:51,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:55:51,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:55:51,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:55:51" (1/1) ... [2021-12-27 23:55:51,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4afd9be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:51, skipping insertion in model container [2021-12-27 23:55:51,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:55:51" (1/1) ... [2021-12-27 23:55:51,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:55:51,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:55:52,231 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-12-27 23:55:52,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:55:52,242 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:55:52,304 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-12-27 23:55:52,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:55:52,328 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:55:52,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52 WrapperNode [2021-12-27 23:55:52,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:55:52,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:55:52,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:55:52,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:55:52,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,388 INFO L137 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2021-12-27 23:55:52,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:55:52,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:55:52,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:55:52,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:55:52,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:55:52,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:55:52,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:55:52,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:55:52,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (1/1) ... [2021-12-27 23:55:52,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:55:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:55:52,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 23:55:52,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 23:55:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-27 23:55:52,495 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-27 23:55:52,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-27 23:55:52,495 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-12-27 23:55:52,495 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-12-27 23:55:52,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:55:52,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 23:55:52,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-27 23:55:52,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-27 23:55:52,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 23:55:52,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-27 23:55:52,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:55:52,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:55:52,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:55:52,602 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:55:52,608 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:55:52,641 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-27 23:55:52,803 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:55:52,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:55:52,809 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-27 23:55:52,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:55:52 BoogieIcfgContainer [2021-12-27 23:55:52,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:55:52,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:55:52,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:55:52,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:55:52,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:55:51" (1/3) ... [2021-12-27 23:55:52,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55448d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:55:52, skipping insertion in model container [2021-12-27 23:55:52,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:55:52" (2/3) ... [2021-12-27 23:55:52,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55448d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:55:52, skipping insertion in model container [2021-12-27 23:55:52,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:55:52" (3/3) ... [2021-12-27 23:55:52,818 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-12-27 23:55:52,822 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:55:52,823 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:55:52,863 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:55:52,868 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:55:52,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:55:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 41 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 23:55:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 23:55:52,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:52,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:55:52,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:52,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:52,902 INFO L85 PathProgramCache]: Analyzing trace with hash 674316384, now seen corresponding path program 1 times [2021-12-27 23:55:52,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:52,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158484042] [2021-12-27 23:55:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:52,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:53,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:53,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-27 23:55:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 23:55:53,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158484042] [2021-12-27 23:55:53,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158484042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:55:53,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:55:53,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 23:55:53,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840344639] [2021-12-27 23:55:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:55:53,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 23:55:53,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:55:53,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 23:55:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:55:53,202 INFO L87 Difference]: Start difference. First operand has 47 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 41 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:55:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:55:53,226 INFO L93 Difference]: Finished difference Result 91 states and 131 transitions. [2021-12-27 23:55:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 23:55:53,229 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-27 23:55:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:55:53,236 INFO L225 Difference]: With dead ends: 91 [2021-12-27 23:55:53,237 INFO L226 Difference]: Without dead ends: 38 [2021-12-27 23:55:53,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 23:55:53,245 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:55:53,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:55:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-27 23:55:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-27 23:55:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 23:55:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-12-27 23:55:53,288 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 26 [2021-12-27 23:55:53,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:55:53,288 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-12-27 23:55:53,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:55:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-12-27 23:55:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-27 23:55:53,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:53,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:55:53,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:55:53,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:53,292 INFO L85 PathProgramCache]: Analyzing trace with hash -170080666, now seen corresponding path program 1 times [2021-12-27 23:55:53,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:53,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312246008] [2021-12-27 23:55:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:53,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:53,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-27 23:55:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:55:53,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:53,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312246008] [2021-12-27 23:55:53,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312246008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:55:53,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146642345] [2021-12-27 23:55:53,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:53,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:53,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:55:53,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:55:53,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 23:55:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:53,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-27 23:55:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:55:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:55:53,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:55:53,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146642345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:55:53,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 23:55:53,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-27 23:55:53,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318167606] [2021-12-27 23:55:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:55:53,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 23:55:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:55:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 23:55:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-27 23:55:53,761 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:55:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:55:53,820 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-12-27 23:55:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 23:55:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-27 23:55:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:55:53,822 INFO L225 Difference]: With dead ends: 70 [2021-12-27 23:55:53,822 INFO L226 Difference]: Without dead ends: 40 [2021-12-27 23:55:53,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-27 23:55:53,824 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:55:53,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 213 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:55:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-27 23:55:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-27 23:55:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 23:55:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-12-27 23:55:53,831 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 33 [2021-12-27 23:55:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:55:53,832 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-12-27 23:55:53,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:55:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-12-27 23:55:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-27 23:55:53,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:53,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:55:53,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 23:55:54,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:54,044 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2056450253, now seen corresponding path program 1 times [2021-12-27 23:55:54,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:54,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050866570] [2021-12-27 23:55:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:54,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 23:55:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-27 23:55:54,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050866570] [2021-12-27 23:55:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050866570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:55:54,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:55:54,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-27 23:55:54,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885836273] [2021-12-27 23:55:54,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:55:54,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 23:55:54,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:55:54,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 23:55:54,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-27 23:55:54,161 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:55:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:55:54,287 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-12-27 23:55:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 23:55:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-27 23:55:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:55:54,290 INFO L225 Difference]: With dead ends: 65 [2021-12-27 23:55:54,291 INFO L226 Difference]: Without dead ends: 60 [2021-12-27 23:55:54,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-27 23:55:54,294 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 148 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:55:54,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 160 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:55:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-27 23:55:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2021-12-27 23:55:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 23:55:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-12-27 23:55:54,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 37 [2021-12-27 23:55:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:55:54,321 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-12-27 23:55:54,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:55:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-12-27 23:55:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-27 23:55:54,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:54,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:55:54,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:55:54,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash -622897270, now seen corresponding path program 1 times [2021-12-27 23:55:54,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:54,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978929674] [2021-12-27 23:55:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:54,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 23:55:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:55:54,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978929674] [2021-12-27 23:55:54,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978929674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:55:54,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:55:54,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-27 23:55:54,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307105784] [2021-12-27 23:55:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:55:54,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 23:55:54,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:55:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 23:55:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-27 23:55:54,453 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 23:55:54,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:55:54,555 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2021-12-27 23:55:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 23:55:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-12-27 23:55:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:55:54,558 INFO L225 Difference]: With dead ends: 103 [2021-12-27 23:55:54,559 INFO L226 Difference]: Without dead ends: 74 [2021-12-27 23:55:54,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-27 23:55:54,560 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:55:54,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 201 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:55:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-27 23:55:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2021-12-27 23:55:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-27 23:55:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-12-27 23:55:54,569 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 38 [2021-12-27 23:55:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:55:54,569 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-12-27 23:55:54,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 23:55:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-12-27 23:55:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-27 23:55:54,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:54,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:55:54,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 23:55:54,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 57161100, now seen corresponding path program 1 times [2021-12-27 23:55:54,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:54,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027992699] [2021-12-27 23:55:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:54,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 23:55:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:55:54,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:54,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027992699] [2021-12-27 23:55:54,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027992699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:55:54,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257459579] [2021-12-27 23:55:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:54,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:55:54,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:55:54,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 23:55:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:54,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 23:55:54,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:55:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:55:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:55:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 23:55:55,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257459579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:55:55,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:55:55,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2021-12-27 23:55:55,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537811349] [2021-12-27 23:55:55,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:55:55,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 23:55:55,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:55:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 23:55:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-27 23:55:55,115 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-27 23:55:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:55:55,378 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2021-12-27 23:55:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-27 23:55:55,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-27 23:55:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:55:55,379 INFO L225 Difference]: With dead ends: 118 [2021-12-27 23:55:55,379 INFO L226 Difference]: Without dead ends: 72 [2021-12-27 23:55:55,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-12-27 23:55:55,381 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:55:55,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 411 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:55:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-27 23:55:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-12-27 23:55:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-27 23:55:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-12-27 23:55:55,388 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 38 [2021-12-27 23:55:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:55:55,389 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-12-27 23:55:55,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 13 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-27 23:55:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-12-27 23:55:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-27 23:55:55,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:55,390 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:55:55,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 23:55:55,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:55,612 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1539273605, now seen corresponding path program 2 times [2021-12-27 23:55:55,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575433233] [2021-12-27 23:55:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:55,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:55,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:55,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 23:55:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-27 23:55:55,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575433233] [2021-12-27 23:55:55,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575433233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:55:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043019322] [2021-12-27 23:55:55,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 23:55:55,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:55,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:55:55,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:55:55,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 23:55:55,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 23:55:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:55:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-27 23:55:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:55:55,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-27 23:55:56,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-27 23:55:56,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 23:55:56,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 23:55:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:55:56,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:55:56,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-27 23:55:56,303 INFO L353 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2021-12-27 23:55:56,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 132 [2021-12-27 23:55:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-27 23:55:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043019322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:55:56,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:55:56,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2021-12-27 23:55:56,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027318005] [2021-12-27 23:55:56,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:55:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 23:55:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:55:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 23:55:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-27 23:55:56,369 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 23:55:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:55:56,545 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2021-12-27 23:55:56,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-27 23:55:56,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-27 23:55:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:55:56,547 INFO L225 Difference]: With dead ends: 88 [2021-12-27 23:55:56,547 INFO L226 Difference]: Without dead ends: 83 [2021-12-27 23:55:56,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-12-27 23:55:56,548 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 34 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:55:56,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 557 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2021-12-27 23:55:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-27 23:55:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2021-12-27 23:55:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-27 23:55:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-12-27 23:55:56,557 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 42 [2021-12-27 23:55:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:55:56,557 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-12-27 23:55:56,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 23:55:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-12-27 23:55:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 23:55:56,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:56,559 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:55:56,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 23:55:56,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:56,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash 524495826, now seen corresponding path program 3 times [2021-12-27 23:55:56,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:56,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931033159] [2021-12-27 23:55:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:56,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:56,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:56,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 23:55:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:55:57,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931033159] [2021-12-27 23:55:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931033159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:55:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471831850] [2021-12-27 23:55:57,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 23:55:57,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:57,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:55:57,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:55:57,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 23:55:57,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-27 23:55:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:55:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-27 23:55:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:55:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-27 23:55:57,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:55:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 23:55:57,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471831850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:55:57,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:55:57,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 26 [2021-12-27 23:55:57,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308586709] [2021-12-27 23:55:57,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:55:57,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-27 23:55:57,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:55:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-27 23:55:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-12-27 23:55:57,663 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-27 23:55:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:55:58,028 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2021-12-27 23:55:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-27 23:55:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-12-27 23:55:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:55:58,030 INFO L225 Difference]: With dead ends: 144 [2021-12-27 23:55:58,030 INFO L226 Difference]: Without dead ends: 139 [2021-12-27 23:55:58,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-12-27 23:55:58,032 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 71 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 23:55:58,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 653 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 23:55:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-27 23:55:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 94. [2021-12-27 23:55:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-27 23:55:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-12-27 23:55:58,047 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 43 [2021-12-27 23:55:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:55:58,049 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-12-27 23:55:58,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-27 23:55:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-12-27 23:55:58,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-27 23:55:58,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:55:58,053 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-27 23:55:58,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 23:55:58,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:58,253 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:55:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:55:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash -868844251, now seen corresponding path program 4 times [2021-12-27 23:55:58,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:55:58,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615909828] [2021-12-27 23:55:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:55:58,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:55:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:55:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:58,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 23:55:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:55:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-27 23:55:58,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:55:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615909828] [2021-12-27 23:55:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615909828] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:55:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344399909] [2021-12-27 23:55:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 23:55:58,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:55:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:55:58,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:55:58,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 23:55:58,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 23:55:58,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:55:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-27 23:55:58,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:55:58,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-27 23:55:58,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-27 23:55:58,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-27 23:55:58,675 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-27 23:55:58,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-27 23:55:58,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-27 23:55:58,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-27 23:55:59,279 INFO L353 Elim1Store]: treesize reduction 80, result has 28.6 percent of original size [2021-12-27 23:55:59,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 91 [2021-12-27 23:55:59,298 INFO L353 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-12-27 23:55:59,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 34 [2021-12-27 23:55:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:55:59,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:56:01,346 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse4 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse1 (select (select .cse0 .cse4) .cse5)) (.cse2 (select (select .cse3 .cse4) .cse5))) (and (= (select (select .cse0 .cse1) .cse2) 0) (= (select (select .cse3 .cse1) .cse2) 0))) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse4)) (not (= .cse5 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|)))))) is different from false [2021-12-27 23:56:01,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 23:56:02,624 INFO L353 Elim1Store]: treesize reduction 3052, result has 38.8 percent of original size [2021-12-27 23:56:02,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 20766 treesize of output 17184 [2021-12-27 23:56:26,548 WARN L228 SmtUtils]: Spent 23.01s on a formula simplification. DAG size of input: 2369 DAG size of output: 956 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-27 23:56:26,551 INFO L353 Elim1Store]: treesize reduction 5175, result has 32.0 percent of original size [2021-12-27 23:56:26,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 39 select indices, 39 select index equivalence classes, 0 disjoint index pairs (out of 741 index pairs), introduced 48 new quantified variables, introduced 741 case distinctions, treesize of input 279892 treesize of output 232729 [2021-12-27 23:56:47,223 WARN L228 SmtUtils]: Spent 20.66s on a formula simplification. DAG size of input: 3461 DAG size of output: 3408 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)