./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10aecdd717bb6691571ad1da0b912f030832fb85361f767ea82293acfe046216 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:30:54,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:30:54,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:30:54,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:30:54,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:30:54,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:30:54,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:30:54,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:30:54,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:30:54,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:30:54,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:30:54,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:30:54,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:30:54,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:30:54,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:30:54,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:30:54,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:30:54,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:30:54,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:30:54,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:30:54,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:30:54,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:30:54,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:30:54,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:30:54,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:30:54,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:30:54,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:30:54,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:30:54,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:30:54,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:30:54,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:30:54,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:30:54,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:30:54,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:30:54,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:30:54,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:30:54,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:30:54,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:30:54,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:30:54,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:30:54,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:30:54,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:30:54,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:30:54,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:30:54,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:30:54,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:30:54,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:30:54,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:30:54,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:30:54,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:30:54,431 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:30:54,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:30:54,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:30:54,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:30:54,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:30:54,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:30:54,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:30:54,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:30:54,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:30:54,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:30:54,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:30:54,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:30:54,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:30:54,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:30:54,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:30:54,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:30:54,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:30:54,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:30:54,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:30:54,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10aecdd717bb6691571ad1da0b912f030832fb85361f767ea82293acfe046216 [2021-12-22 10:30:54,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:30:54,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:30:54,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:30:54,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:30:54,661 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:30:54,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i [2021-12-22 10:30:54,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db4f3892e/e8dcfdb009b946129fccfac83b63ac25/FLAGc08b4116d [2021-12-22 10:30:55,089 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:30:55,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i [2021-12-22 10:30:55,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db4f3892e/e8dcfdb009b946129fccfac83b63ac25/FLAGc08b4116d [2021-12-22 10:30:55,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db4f3892e/e8dcfdb009b946129fccfac83b63ac25 [2021-12-22 10:30:55,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:30:55,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:30:55,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:30:55,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:30:55,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:30:55,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682b771d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55, skipping insertion in model container [2021-12-22 10:30:55,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:30:55,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:30:55,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26271,26284] [2021-12-22 10:30:55,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26396,26409] [2021-12-22 10:30:55,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26511,26524] [2021-12-22 10:30:55,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:30:55,796 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:30:55,865 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26271,26284] [2021-12-22 10:30:55,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26396,26409] [2021-12-22 10:30:55,867 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26511,26524] [2021-12-22 10:30:55,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:30:55,897 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:30:55,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55 WrapperNode [2021-12-22 10:30:55,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:30:55,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:30:55,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:30:55,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:30:55,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,950 INFO L137 Inliner]: procedures = 142, calls = 62, calls flagged for inlining = 15, calls inlined = 14, statements flattened = 161 [2021-12-22 10:30:55,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:30:55,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:30:55,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:30:55,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:30:55,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:55,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:30:55,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:30:55,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:30:55,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:30:55,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (1/1) ... [2021-12-22 10:30:56,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:30:56,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:30:56,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:30:56,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:30:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-22 10:30:56,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-22 10:30:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2021-12-22 10:30:56,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2021-12-22 10:30:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 10:30:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:30:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 10:30:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2021-12-22 10:30:56,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2021-12-22 10:30:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 10:30:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 10:30:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 10:30:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:30:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2021-12-22 10:30:56,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2021-12-22 10:30:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:30:56,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:30:56,223 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:30:56,224 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:30:56,497 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:30:56,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:30:56,518 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-22 10:30:56,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:30:56 BoogieIcfgContainer [2021-12-22 10:30:56,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:30:56,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:30:56,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:30:56,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:30:56,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:30:55" (1/3) ... [2021-12-22 10:30:56,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423f1b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:30:56, skipping insertion in model container [2021-12-22 10:30:56,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:30:55" (2/3) ... [2021-12-22 10:30:56,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423f1b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:30:56, skipping insertion in model container [2021-12-22 10:30:56,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:30:56" (3/3) ... [2021-12-22 10:30:56,525 INFO L111 eAbstractionObserver]: Analyzing ICFG test_mutex_unbounded-1.i [2021-12-22 10:30:56,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:30:56,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-12-22 10:30:56,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:30:56,561 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:30:56,561 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 10:30:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 60 states have internal predecessors, (76), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 10:30:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 10:30:56,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:30:56,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:30:56,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:30:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:30:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 104123182, now seen corresponding path program 1 times [2021-12-22 10:30:56,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:30:56,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950862646] [2021-12-22 10:30:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:30:56,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:30:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:30:56,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:30:56,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950862646] [2021-12-22 10:30:56,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950862646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:30:56,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:30:56,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:30:56,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685150582] [2021-12-22 10:30:56,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:30:56,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:30:56,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:30:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:30:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:30:56,791 INFO L87 Difference]: Start difference. First operand has 72 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 60 states have internal predecessors, (76), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:30:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:30:56,817 INFO L93 Difference]: Finished difference Result 141 states and 186 transitions. [2021-12-22 10:30:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:30:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 10:30:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:30:56,825 INFO L225 Difference]: With dead ends: 141 [2021-12-22 10:30:56,825 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 10:30:56,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:30:56,832 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:30:56,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:30:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 10:30:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-22 10:30:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 10:30:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-12-22 10:30:56,879 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 13 [2021-12-22 10:30:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:30:56,879 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-12-22 10:30:56,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:30:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-12-22 10:30:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 10:30:56,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:30:56,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:30:56,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:30:56,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:30:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:30:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1817192448, now seen corresponding path program 1 times [2021-12-22 10:30:56,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:30:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760669094] [2021-12-22 10:30:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:30:56,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:30:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:30:56,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:30:56,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760669094] [2021-12-22 10:30:56,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760669094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:30:56,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:30:56,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:30:56,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411782982] [2021-12-22 10:30:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:30:56,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 10:30:56,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:30:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 10:30:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:30:57,003 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:30:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:30:57,166 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2021-12-22 10:30:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 10:30:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 10:30:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:30:57,168 INFO L225 Difference]: With dead ends: 122 [2021-12-22 10:30:57,169 INFO L226 Difference]: Without dead ends: 116 [2021-12-22 10:30:57,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 10:30:57,170 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 58 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:30:57,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 327 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:30:57,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-22 10:30:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-12-22 10:30:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 80 states have (on average 1.2375) internal successors, (99), 83 states have internal predecessors, (99), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-22 10:30:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2021-12-22 10:30:57,181 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 13 [2021-12-22 10:30:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:30:57,181 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2021-12-22 10:30:57,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:30:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2021-12-22 10:30:57,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 10:30:57,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:30:57,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:30:57,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:30:57,183 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:30:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:30:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1399408007, now seen corresponding path program 1 times [2021-12-22 10:30:57,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:30:57,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900320819] [2021-12-22 10:30:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:30:57,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:30:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 10:30:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:30:57,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:30:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900320819] [2021-12-22 10:30:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900320819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:30:57,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:30:57,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:30:57,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532530643] [2021-12-22 10:30:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:30:57,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:30:57,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:30:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:30:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:30:57,247 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:30:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:30:57,259 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2021-12-22 10:30:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:30:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 10:30:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:30:57,261 INFO L225 Difference]: With dead ends: 109 [2021-12-22 10:30:57,261 INFO L226 Difference]: Without dead ends: 107 [2021-12-22 10:30:57,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:30:57,262 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:30:57,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 224 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:30:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-22 10:30:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-22 10:30:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 89 states have internal predecessors, (105), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (17), 13 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-22 10:30:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2021-12-22 10:30:57,270 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 15 [2021-12-22 10:30:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:30:57,271 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2021-12-22 10:30:57,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:30:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2021-12-22 10:30:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 10:30:57,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:30:57,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:30:57,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:30:57,272 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:30:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:30:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash 175195298, now seen corresponding path program 1 times [2021-12-22 10:30:57,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:30:57,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703515379] [2021-12-22 10:30:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:30:57,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:30:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 10:30:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:30:57,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:30:57,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703515379] [2021-12-22 10:30:57,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703515379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:30:57,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:30:57,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:30:57,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621287649] [2021-12-22 10:30:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:30:57,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:30:57,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:30:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:30:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:30:57,323 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:30:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:30:57,401 INFO L93 Difference]: Finished difference Result 183 states and 222 transitions. [2021-12-22 10:30:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:30:57,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-22 10:30:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:30:57,402 INFO L225 Difference]: With dead ends: 183 [2021-12-22 10:30:57,402 INFO L226 Difference]: Without dead ends: 83 [2021-12-22 10:30:57,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:30:57,404 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 19 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:30:57,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 190 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:30:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-22 10:30:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-12-22 10:30:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 64 states have internal predecessors, (70), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-22 10:30:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-12-22 10:30:57,411 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 15 [2021-12-22 10:30:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:30:57,411 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-12-22 10:30:57,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 10:30:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-12-22 10:30:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 10:30:57,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:30:57,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:30:57,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 10:30:57,413 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:30:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:30:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1662157324, now seen corresponding path program 1 times [2021-12-22 10:30:57,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:30:57,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762270363] [2021-12-22 10:30:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:30:57,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:30:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 10:30:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:30:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 10:30:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:30:57,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:30:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762270363] [2021-12-22 10:30:57,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762270363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:30:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271408807] [2021-12-22 10:30:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:30:57,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:30:57,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:30:57,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:30:57,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:30:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:30:57,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-22 10:30:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:30:58,031 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 10:30:58,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 10:30:58,236 INFO L353 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2021-12-22 10:30:58,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 182 [2021-12-22 10:30:58,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:30:58,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:30:58,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 10:30:58,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-22 10:30:59,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 10:30:59,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:30:59,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:30:59,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-22 10:30:59,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:30:59,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-22 10:30:59,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 10:30:59,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 10:30:59,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-22 10:30:59,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-22 10:30:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:30:59,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:30:59,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 10:30:59,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 746 treesize of output 735 [2021-12-22 10:30:59,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 814 treesize of output 798 [2021-12-22 10:30:59,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 974 treesize of output 942 [2021-12-22 10:30:59,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 942 treesize of output 934 [2021-12-22 10:30:59,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 934 treesize of output 930 [2021-12-22 10:30:59,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 10:30:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:30:59,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-22 10:30:59,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:30:59,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 10:31:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:31:00,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271408807] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:31:00,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:31:00,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2021-12-22 10:31:00,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421363200] [2021-12-22 10:31:00,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:31:00,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 10:31:00,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:31:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 10:31:00,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 10:31:00,068 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 33 states, 28 states have (on average 2.0) internal successors, (56), 25 states have internal predecessors, (56), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-22 10:31:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:31:01,174 INFO L93 Difference]: Finished difference Result 239 states and 287 transitions. [2021-12-22 10:31:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 10:31:01,175 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.0) internal successors, (56), 25 states have internal predecessors, (56), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2021-12-22 10:31:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:31:01,177 INFO L225 Difference]: With dead ends: 239 [2021-12-22 10:31:01,177 INFO L226 Difference]: Without dead ends: 208 [2021-12-22 10:31:01,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 10:31:01,178 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 596 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 10:31:01,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 730 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 10:31:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-22 10:31:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 138. [2021-12-22 10:31:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 116 states have internal predecessors, (136), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-22 10:31:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2021-12-22 10:31:01,207 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 31 [2021-12-22 10:31:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:31:01,208 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2021-12-22 10:31:01,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.0) internal successors, (56), 25 states have internal predecessors, (56), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-22 10:31:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2021-12-22 10:31:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 10:31:01,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:31:01,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:31:01,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:31:01,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:31:01,428 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:31:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:31:01,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1949197394, now seen corresponding path program 1 times [2021-12-22 10:31:01,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:31:01,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599120790] [2021-12-22 10:31:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:31:01,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:31:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:31:01,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 10:31:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:31:01,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 10:31:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:31:02,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 10:31:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat