./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_seq_init_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/array-examples/standard_seq_init_ground.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 eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:02:17,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:02:17,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:02:17,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:02:17,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:02:17,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:02:17,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:02:17,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:02:17,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:02:17,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:02:17,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:02:17,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:02:17,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:02:17,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:02:17,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:02:17,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:02:17,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:02:17,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:02:17,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:02:17,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:02:17,298 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:02:17,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:02:17,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:02:17,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:02:17,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:02:17,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:02:17,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:02:17,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:02:17,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:02:17,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:02:17,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:02:17,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:02:17,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:02:17,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:02:17,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:02:17,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:02:17,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:02:17,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:02:17,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:02:17,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:02:17,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:02:17,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:02:17,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:02:17,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:02:17,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:02:17,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:02:17,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:02:17,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:02:17,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:02:17,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:02:17,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:02:17,336 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:02:17,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:02:17,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:02:17,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:02:17,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:02:17,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:02:17,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:02:17,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:02:17,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:02:17,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:02:17,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:02:17,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:02:17,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:02:17,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:02:17,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:02:17,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:02:17,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:02:17,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:02:17,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:02:17,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:02:17,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:02:17,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:02:17,344 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:02:17,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:02:17,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:02:17,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eab386bb7401f51a7807d88da5762f33f54a558b2c1945526724b989e81d1d36 [2022-07-11 22:02:17,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:02:17,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:02:17,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:02:17,632 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:02:17,632 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:02:17,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2022-07-11 22:02:17,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/201d660be/4ef0731f51524a27b20276f998703793/FLAG412131047 [2022-07-11 22:02:18,110 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:02:18,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_seq_init_ground.i [2022-07-11 22:02:18,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/201d660be/4ef0731f51524a27b20276f998703793/FLAG412131047 [2022-07-11 22:02:18,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/201d660be/4ef0731f51524a27b20276f998703793 [2022-07-11 22:02:18,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:02:18,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:02:18,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:02:18,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:02:18,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:02:18,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa2e607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18, skipping insertion in model container [2022-07-11 22:02:18,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:02:18,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:02:18,667 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/array-examples/standard_seq_init_ground.i[817,830] [2022-07-11 22:02:18,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:02:18,715 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:02:18,728 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/array-examples/standard_seq_init_ground.i[817,830] [2022-07-11 22:02:18,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:02:18,746 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:02:18,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18 WrapperNode [2022-07-11 22:02:18,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:02:18,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:02:18,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:02:18,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:02:18,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,777 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-07-11 22:02:18,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:02:18,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:02:18,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:02:18,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:02:18,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:02:18,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:02:18,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:02:18,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:02:18,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (1/1) ... [2022-07-11 22:02:18,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:02:18,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:18,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 22:02:18,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 22:02:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:02:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:02:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:02:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:02:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:02:18,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:02:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:02:18,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:02:18,929 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:02:18,930 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:02:19,011 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:02:19,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:02:19,016 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 22:02:19,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:02:19 BoogieIcfgContainer [2022-07-11 22:02:19,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:02:19,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:02:19,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:02:19,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:02:19,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:02:18" (1/3) ... [2022-07-11 22:02:19,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d71530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:02:19, skipping insertion in model container [2022-07-11 22:02:19,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:02:18" (2/3) ... [2022-07-11 22:02:19,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d71530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:02:19, skipping insertion in model container [2022-07-11 22:02:19,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:02:19" (3/3) ... [2022-07-11 22:02:19,028 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2022-07-11 22:02:19,041 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:02:19,041 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:02:19,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:02:19,088 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c60613f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46600403 [2022-07-11 22:02:19,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:02:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-11 22:02:19,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:19,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:19,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:19,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1808850128, now seen corresponding path program 1 times [2022-07-11 22:02:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:19,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877042499] [2022-07-11 22:02:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:19,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877042499] [2022-07-11 22:02:19,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877042499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:02:19,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:02:19,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:02:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709220021] [2022-07-11 22:02:19,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:02:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:02:19,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:19,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:02:19,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:02:19,282 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:02:19,323 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2022-07-11 22:02:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:02:19,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-11 22:02:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:02:19,333 INFO L225 Difference]: With dead ends: 26 [2022-07-11 22:02:19,356 INFO L226 Difference]: Without dead ends: 11 [2022-07-11 22:02:19,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:02:19,362 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:02:19,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:02:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-11 22:02:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-11 22:02:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-11 22:02:19,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2022-07-11 22:02:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:02:19,408 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-11 22:02:19,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-11 22:02:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-11 22:02:19,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:19,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:19,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:02:19,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:19,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash 291255051, now seen corresponding path program 1 times [2022-07-11 22:02:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:19,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283439082] [2022-07-11 22:02:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283439082] [2022-07-11 22:02:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283439082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:02:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732920930] [2022-07-11 22:02:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:19,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:19,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:02:19,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:02:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:02:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:02:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:19,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:02:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:19,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732920930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:02:19,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:02:19,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 22:02:19,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643683833] [2022-07-11 22:02:19,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:02:19,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:02:19,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:02:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:02:19,650 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:02:19,680 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-07-11 22:02:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 22:02:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-11 22:02:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:02:19,682 INFO L225 Difference]: With dead ends: 21 [2022-07-11 22:02:19,682 INFO L226 Difference]: Without dead ends: 14 [2022-07-11 22:02:19,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:02:19,684 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:02:19,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:02:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-11 22:02:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-11 22:02:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-07-11 22:02:19,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 8 [2022-07-11 22:02:19,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:02:19,688 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-07-11 22:02:19,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-07-11 22:02:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 22:02:19,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:19,689 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:19,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:02:19,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:19,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash 521278352, now seen corresponding path program 2 times [2022-07-11 22:02:19,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:19,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059705915] [2022-07-11 22:02:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:19,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:19,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059705915] [2022-07-11 22:02:19,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059705915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:02:19,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166145247] [2022-07-11 22:02:19,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:02:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:19,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:19,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:02:20,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:02:20,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:02:20,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:02:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:02:20,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:02:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:20,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:02:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:20,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166145247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:02:20,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:02:20,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-11 22:02:20,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778360721] [2022-07-11 22:02:20,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:02:20,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:02:20,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:02:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:02:20,187 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:02:20,228 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-07-11 22:02:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 22:02:20,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 22:02:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:02:20,229 INFO L225 Difference]: With dead ends: 27 [2022-07-11 22:02:20,230 INFO L226 Difference]: Without dead ends: 20 [2022-07-11 22:02:20,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:02:20,232 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:02:20,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:02:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-11 22:02:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-11 22:02:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-11 22:02:20,238 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2022-07-11 22:02:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:02:20,238 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-11 22:02:20,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-11 22:02:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-11 22:02:20,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:20,238 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:20,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:02:20,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-11 22:02:20,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1061727824, now seen corresponding path program 3 times [2022-07-11 22:02:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:20,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902480700] [2022-07-11 22:02:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:20,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:20,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:20,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902480700] [2022-07-11 22:02:20,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902480700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:02:20,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502836777] [2022-07-11 22:02:20,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:02:20,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:20,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:02:20,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:02:20,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-11 22:02:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:02:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 22:02:20,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:02:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:20,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:02:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:21,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502836777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:02:21,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:02:21,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-11 22:02:21,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676391457] [2022-07-11 22:02:21,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:02:21,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:02:21,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:02:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:02:21,047 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:02:21,092 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-07-11 22:02:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:02:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-11 22:02:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:02:21,094 INFO L225 Difference]: With dead ends: 39 [2022-07-11 22:02:21,094 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 22:02:21,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:02:21,095 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:02:21,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:02:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 22:02:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-11 22:02:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-11 22:02:21,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 17 [2022-07-11 22:02:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:02:21,102 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-11 22:02:21,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-11 22:02:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 22:02:21,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:21,104 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:21,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:02:21,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:21,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash 265717232, now seen corresponding path program 4 times [2022-07-11 22:02:21,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:21,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560124170] [2022-07-11 22:02:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:21,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:21,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560124170] [2022-07-11 22:02:21,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560124170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:02:21,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774151301] [2022-07-11 22:02:21,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:02:21,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:21,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:21,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:02:21,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:02:21,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:02:21,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:02:21,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 22:02:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:02:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:21,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:02:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:22,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774151301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:02:22,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:02:22,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-11 22:02:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538267027] [2022-07-11 22:02:22,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:02:22,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-11 22:02:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:22,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-11 22:02:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 22:02:22,540 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:02:22,605 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2022-07-11 22:02:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-11 22:02:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-11 22:02:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:02:22,607 INFO L225 Difference]: With dead ends: 63 [2022-07-11 22:02:22,607 INFO L226 Difference]: Without dead ends: 56 [2022-07-11 22:02:22,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 22:02:22,609 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:02:22,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:02:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-11 22:02:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-11 22:02:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-07-11 22:02:22,630 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 29 [2022-07-11 22:02:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:02:22,630 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-07-11 22:02:22,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-07-11 22:02:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-11 22:02:22,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:22,633 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:22,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:02:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:22,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1684000368, now seen corresponding path program 5 times [2022-07-11 22:02:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096064844] [2022-07-11 22:02:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:23,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:23,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096064844] [2022-07-11 22:02:23,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096064844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:02:23,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352543175] [2022-07-11 22:02:23,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:02:23,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:23,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:02:23,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:02:39,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-11 22:02:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:02:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-11 22:02:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:02:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:39,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:02:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:42,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352543175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:02:42,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:02:42,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-11 22:02:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52453700] [2022-07-11 22:02:42,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:02:42,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-11 22:02:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:02:42,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-11 22:02:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-11 22:02:42,251 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:02:42,437 INFO L93 Difference]: Finished difference Result 111 states and 160 transitions. [2022-07-11 22:02:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-11 22:02:42,438 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-11 22:02:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:02:42,440 INFO L225 Difference]: With dead ends: 111 [2022-07-11 22:02:42,440 INFO L226 Difference]: Without dead ends: 104 [2022-07-11 22:02:42,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-11 22:02:42,445 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:02:42,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:02:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-11 22:02:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-11 22:02:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-07-11 22:02:42,468 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 53 [2022-07-11 22:02:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:02:42,469 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-07-11 22:02:42,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:02:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-07-11 22:02:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-11 22:02:42,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:02:42,472 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:02:42,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:02:42,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:42,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:02:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:02:42,692 INFO L85 PathProgramCache]: Analyzing trace with hash -765599888, now seen corresponding path program 6 times [2022-07-11 22:02:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:02:42,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913996095] [2022-07-11 22:02:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:02:42,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:02:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:02:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:02:45,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:02:45,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913996095] [2022-07-11 22:02:45,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913996095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:02:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201477663] [2022-07-11 22:02:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:02:45,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:02:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:02:45,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:02:45,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process