./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_dekker.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/seq-pthread/cs_dekker.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 ee7ff83d9ca4f9baaadd009c98a7dd30697b6140296199117a6b05757b5b9f74 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 06:19:29,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 06:19:29,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 06:19:29,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 06:19:29,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 06:19:29,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 06:19:29,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 06:19:29,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 06:19:29,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 06:19:29,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 06:19:29,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 06:19:29,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 06:19:29,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 06:19:29,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 06:19:29,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 06:19:29,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 06:19:29,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 06:19:29,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 06:19:29,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 06:19:29,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 06:19:29,247 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 06:19:29,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 06:19:29,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 06:19:29,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 06:19:29,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 06:19:29,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 06:19:29,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 06:19:29,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 06:19:29,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 06:19:29,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 06:19:29,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 06:19:29,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 06:19:29,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 06:19:29,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 06:19:29,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 06:19:29,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 06:19:29,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 06:19:29,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 06:19:29,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 06:19:29,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 06:19:29,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 06:19:29,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 06:19:29,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 06:19:29,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 06:19:29,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 06:19:29,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 06:19:29,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 06:19:29,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 06:19:29,319 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 06:19:29,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 06:19:29,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 06:19:29,331 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 06:19:29,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 06:19:29,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 06:19:29,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 06:19:29,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 06:19:29,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 06:19:29,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 06:19:29,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 06:19:29,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 06:19:29,334 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 06:19:29,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 06:19:29,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 06:19:29,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 06:19:29,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 06:19:29,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 06:19:29,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 06:19:29,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 06:19:29,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 06:19:29,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 06:19:29,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 06:19:29,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 06:19:29,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 06:19:29,338 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 06:19:29,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 06:19:29,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 06:19:29,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee7ff83d9ca4f9baaadd009c98a7dd30697b6140296199117a6b05757b5b9f74 [2022-07-21 06:19:29,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 06:19:29,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 06:19:29,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 06:19:29,700 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 06:19:29,701 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 06:19:29,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_dekker.i [2022-07-21 06:19:29,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0e9c096/4e4e746ab81d480f80abe2c6dae59cf2/FLAG108d5a2ac [2022-07-21 06:19:30,379 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 06:19:30,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_dekker.i [2022-07-21 06:19:30,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0e9c096/4e4e746ab81d480f80abe2c6dae59cf2/FLAG108d5a2ac [2022-07-21 06:19:30,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0e9c096/4e4e746ab81d480f80abe2c6dae59cf2 [2022-07-21 06:19:30,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 06:19:30,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 06:19:30,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 06:19:30,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 06:19:30,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 06:19:30,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 06:19:30" (1/1) ... [2022-07-21 06:19:30,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742e876f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:30, skipping insertion in model container [2022-07-21 06:19:30,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 06:19:30" (1/1) ... [2022-07-21 06:19:30,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 06:19:30,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 06:19:31,102 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/seq-pthread/cs_dekker.i[23603,23616] [2022-07-21 06:19:31,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 06:19:31,264 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 06:19:31,310 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/seq-pthread/cs_dekker.i[23603,23616] [2022-07-21 06:19:31,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 06:19:31,427 INFO L208 MainTranslator]: Completed translation [2022-07-21 06:19:31,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31 WrapperNode [2022-07-21 06:19:31,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 06:19:31,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 06:19:31,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 06:19:31,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 06:19:31,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,536 INFO L137 Inliner]: procedures = 145, calls = 300, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 448 [2022-07-21 06:19:31,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 06:19:31,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 06:19:31,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 06:19:31,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 06:19:31,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 06:19:31,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 06:19:31,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 06:19:31,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 06:19:31,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (1/1) ... [2022-07-21 06:19:31,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 06:19:31,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 06:19:31,685 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) [2022-07-21 06:19:31,714 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 [2022-07-21 06:19:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 06:19:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 06:19:31,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 06:19:31,731 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 06:19:31,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 06:19:31,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 06:19:31,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 06:19:31,731 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2022-07-21 06:19:31,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2022-07-21 06:19:31,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 06:19:31,732 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2022-07-21 06:19:31,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2022-07-21 06:19:31,733 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-07-21 06:19:31,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-07-21 06:19:31,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 06:19:31,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 06:19:31,733 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2022-07-21 06:19:31,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2022-07-21 06:19:31,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 06:19:31,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 06:19:31,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 06:19:31,948 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 06:19:31,950 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 06:19:34,716 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 06:19:34,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 06:19:34,724 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 06:19:34,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 06:19:34 BoogieIcfgContainer [2022-07-21 06:19:34,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 06:19:34,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 06:19:34,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 06:19:34,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 06:19:34,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 06:19:30" (1/3) ... [2022-07-21 06:19:34,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f2184a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 06:19:34, skipping insertion in model container [2022-07-21 06:19:34,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 06:19:31" (2/3) ... [2022-07-21 06:19:34,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f2184a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 06:19:34, skipping insertion in model container [2022-07-21 06:19:34,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 06:19:34" (3/3) ... [2022-07-21 06:19:34,734 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_dekker.i [2022-07-21 06:19:34,749 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 06:19:34,749 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 06:19:34,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 06:19:34,816 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@1dbe502, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4df91f86 [2022-07-21 06:19:34,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 06:19:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 80 states have internal predecessors, (106), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 06:19:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-21 06:19:34,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:19:34,838 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:19:34,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:19:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:19:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -729648901, now seen corresponding path program 1 times [2022-07-21 06:19:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:19:34,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764132338] [2022-07-21 06:19:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:19:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:19:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 06:19:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 06:19:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 06:19:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 06:19:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-21 06:19:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-21 06:19:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-21 06:19:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-21 06:19:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-21 06:19:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 06:19:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-21 06:19:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-21 06:19:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 06:19:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-21 06:19:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-07-21 06:19:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-21 06:19:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-21 06:19:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-21 06:19:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-21 06:19:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-07-21 06:19:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-21 06:19:39,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:19:39,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764132338] [2022-07-21 06:19:39,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764132338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:19:39,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:19:39,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:19:39,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473877422] [2022-07-21 06:19:39,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:19:39,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:19:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:19:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:19:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:19:39,223 INFO L87 Difference]: Start difference. First operand has 121 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 80 states have internal predecessors, (106), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-21 06:19:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:19:39,334 INFO L93 Difference]: Finished difference Result 244 states and 391 transitions. [2022-07-21 06:19:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:19:39,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 132 [2022-07-21 06:19:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:19:39,345 INFO L225 Difference]: With dead ends: 244 [2022-07-21 06:19:39,346 INFO L226 Difference]: Without dead ends: 121 [2022-07-21 06:19:39,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:19:39,356 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:19:39,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 336 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:19:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-21 06:19:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-07-21 06:19:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 77 states have internal predecessors, (99), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 06:19:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 169 transitions. [2022-07-21 06:19:39,429 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 169 transitions. Word has length 132 [2022-07-21 06:19:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:19:39,430 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 169 transitions. [2022-07-21 06:19:39,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-21 06:19:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 169 transitions. [2022-07-21 06:19:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-21 06:19:39,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:19:39,488 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:19:39,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 06:19:39,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:19:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:19:39,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1953842143, now seen corresponding path program 1 times [2022-07-21 06:19:39,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:19:39,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930798126] [2022-07-21 06:19:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:19:39,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:19:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:40,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 06:19:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:40,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 06:19:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:40,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 06:19:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:40,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 06:19:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:40,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 06:19:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 06:19:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 06:19:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 06:19:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-21 06:19:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 06:19:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 06:19:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-21 06:19:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 06:19:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 06:19:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-21 06:19:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 06:19:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 06:19:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-21 06:19:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-07-21 06:19:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-21 06:19:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-21 06:19:41,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:19:41,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930798126] [2022-07-21 06:19:41,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930798126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:19:41,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 06:19:41,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 06:19:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586150662] [2022-07-21 06:19:41,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:19:41,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 06:19:41,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:19:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 06:19:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:19:41,155 INFO L87 Difference]: Start difference. First operand 118 states and 169 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-21 06:19:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:19:41,193 INFO L93 Difference]: Finished difference Result 235 states and 338 transitions. [2022-07-21 06:19:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 06:19:41,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 135 [2022-07-21 06:19:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:19:41,199 INFO L225 Difference]: With dead ends: 235 [2022-07-21 06:19:41,199 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 06:19:41,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 06:19:41,202 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:19:41,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 329 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:19:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 06:19:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-21 06:19:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 78 states have internal predecessors, (100), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 06:19:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 170 transitions. [2022-07-21 06:19:41,219 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 170 transitions. Word has length 135 [2022-07-21 06:19:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:19:41,221 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 170 transitions. [2022-07-21 06:19:41,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-21 06:19:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 170 transitions. [2022-07-21 06:19:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-21 06:19:41,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:19:41,224 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:19:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 06:19:41,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:19:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:19:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -230839453, now seen corresponding path program 1 times [2022-07-21 06:19:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:19:41,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744349718] [2022-07-21 06:19:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:19:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:19:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 06:19:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 06:19:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 06:19:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-21 06:19:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-21 06:19:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-21 06:19:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 06:19:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-21 06:19:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-21 06:19:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 06:19:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-21 06:19:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-21 06:19:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-21 06:19:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-21 06:19:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-21 06:19:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-21 06:19:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-21 06:19:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-21 06:19:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-21 06:19:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-07-21 06:19:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-21 06:19:42,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:19:42,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744349718] [2022-07-21 06:19:42,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744349718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 06:19:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129580581] [2022-07-21 06:19:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:19:42,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 06:19:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 06:19:42,682 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) [2022-07-21 06:19:42,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 06:19:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 18469 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 06:19:48,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 06:19:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-21 06:19:48,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 06:19:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-21 06:19:49,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129580581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 06:19:49,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 06:19:49,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-07-21 06:19:49,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330018470] [2022-07-21 06:19:49,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 06:19:49,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 06:19:49,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:19:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 06:19:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-21 06:19:49,105 INFO L87 Difference]: Start difference. First operand 119 states and 170 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2022-07-21 06:19:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:19:49,172 INFO L93 Difference]: Finished difference Result 239 states and 343 transitions. [2022-07-21 06:19:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 06:19:49,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 137 [2022-07-21 06:19:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:19:49,177 INFO L225 Difference]: With dead ends: 239 [2022-07-21 06:19:49,178 INFO L226 Difference]: Without dead ends: 123 [2022-07-21 06:19:49,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-07-21 06:19:49,183 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 3 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:19:49,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 492 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:19:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-21 06:19:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-07-21 06:19:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 35 states have call successors, (35), 5 states have call predecessors, (35), 5 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-21 06:19:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2022-07-21 06:19:49,205 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 137 [2022-07-21 06:19:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:19:49,205 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2022-07-21 06:19:49,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2022-07-21 06:19:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2022-07-21 06:19:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-21 06:19:49,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:19:49,212 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:19:49,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 06:19:49,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 06:19:49,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:19:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:19:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1631015015, now seen corresponding path program 2 times [2022-07-21 06:19:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:19:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144007512] [2022-07-21 06:19:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:19:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:19:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-21 06:19:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-21 06:19:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 06:19:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 06:19:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-21 06:19:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-21 06:19:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-21 06:19:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-21 06:19:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-21 06:19:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-21 06:19:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-21 06:19:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-21 06:19:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-21 06:19:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-21 06:19:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-21 06:19:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-07-21 06:19:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-21 06:19:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-07-21 06:19:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-21 06:19:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-21 06:19:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:19:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2022-07-21 06:19:53,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:19:53,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144007512] [2022-07-21 06:19:53,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144007512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 06:19:53,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634271510] [2022-07-21 06:19:53,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 06:19:53,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 06:19:53,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 06:19:53,086 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) [2022-07-21 06:19:53,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 06:20:25,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 06:20:25,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 06:20:25,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 18077 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 06:20:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 06:20:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-07-21 06:20:26,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 06:20:26,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634271510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 06:20:26,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 06:20:26,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-21 06:20:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617047505] [2022-07-21 06:20:26,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 06:20:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 06:20:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:20:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 06:20:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 06:20:26,017 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-21 06:20:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:20:26,049 INFO L93 Difference]: Finished difference Result 231 states and 334 transitions. [2022-07-21 06:20:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 06:20:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 141 [2022-07-21 06:20:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:20:26,053 INFO L225 Difference]: With dead ends: 231 [2022-07-21 06:20:26,053 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 06:20:26,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 06:20:26,055 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 87 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 06:20:26,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 582 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 06:20:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 06:20:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-07-21 06:20:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 125 states have (on average 1.312) internal successors, (164), 125 states have internal predecessors, (164), 49 states have call successors, (49), 10 states have call predecessors, (49), 10 states have return successors, (53), 49 states have call predecessors, (53), 49 states have call successors, (53) [2022-07-21 06:20:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2022-07-21 06:20:26,072 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 141 [2022-07-21 06:20:26,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:20:26,073 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2022-07-21 06:20:26,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-07-21 06:20:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2022-07-21 06:20:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-21 06:20:26,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:20:26,077 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:20:26,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 06:20:26,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 06:20:26,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:20:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:20:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2005931619, now seen corresponding path program 1 times [2022-07-21 06:20:26,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:20:26,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855283431] [2022-07-21 06:20:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:20:26,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 06:20:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 06:20:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 06:20:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 06:20:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 06:20:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 06:20:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-21 06:20:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 06:20:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 06:20:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 06:20:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-07-21 06:20:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 06:20:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-21 06:20:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-21 06:20:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 06:20:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-21 06:20:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-21 06:20:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-21 06:20:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-21 06:20:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-21 06:20:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-21 06:20:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-07-21 06:20:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-07-21 06:20:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-07-21 06:20:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-21 06:20:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-07-21 06:20:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-07-21 06:20:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-07-21 06:20:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-21 06:20:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-07-21 06:20:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-07-21 06:20:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-21 06:20:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-07-21 06:20:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-07-21 06:20:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-07-21 06:20:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-07-21 06:20:28,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 06:20:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855283431] [2022-07-21 06:20:28,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855283431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 06:20:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284473026] [2022-07-21 06:20:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:20:28,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 06:20:28,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 06:20:28,873 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) [2022-07-21 06:20:28,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 06:20:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 06:20:36,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 19140 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 06:20:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 06:20:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-07-21 06:20:36,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 06:20:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1284 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-07-21 06:20:36,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284473026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 06:20:36,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 06:20:36,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-07-21 06:20:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420346343] [2022-07-21 06:20:36,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 06:20:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 06:20:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 06:20:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 06:20:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-21 06:20:36,540 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (69), 6 states have call predecessors, (69), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-21 06:20:38,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 06:20:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 06:20:39,365 INFO L93 Difference]: Finished difference Result 386 states and 554 transitions. [2022-07-21 06:20:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 06:20:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (69), 6 states have call predecessors, (69), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 235 [2022-07-21 06:20:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 06:20:39,370 INFO L225 Difference]: With dead ends: 386 [2022-07-21 06:20:39,370 INFO L226 Difference]: Without dead ends: 213 [2022-07-21 06:20:39,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 533 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-21 06:20:39,373 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 49 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-21 06:20:39,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 610 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 522 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-07-21 06:20:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-21 06:20:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2022-07-21 06:20:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 146 states have (on average 1.2808219178082192) internal successors, (187), 148 states have internal predecessors, (187), 49 states have call successors, (49), 10 states have call predecessors, (49), 12 states have return successors, (57), 49 states have call predecessors, (57), 49 states have call successors, (57) [2022-07-21 06:20:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 293 transitions. [2022-07-21 06:20:39,406 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 293 transitions. Word has length 235 [2022-07-21 06:20:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 06:20:39,406 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 293 transitions. [2022-07-21 06:20:39,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 6 states have internal predecessors, (114), 2 states have call successors, (69), 6 states have call predecessors, (69), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2022-07-21 06:20:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 293 transitions. [2022-07-21 06:20:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-21 06:20:39,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 06:20:39,410 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 06:20:39,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 06:20:39,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 06:20:39,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 06:20:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 06:20:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1218450205, now seen corresponding path program 2 times [2022-07-21 06:20:39,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 06:20:39,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871901965] [2022-07-21 06:20:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 06:20:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms