./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel/misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel/misc-3.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 41858035b0eac500692d816b890f84e56e392c8a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 12:07:37,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 12:07:37,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 12:07:37,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 12:07:37,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 12:07:37,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 12:07:37,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 12:07:37,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 12:07:37,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 12:07:37,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 12:07:37,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 12:07:37,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 12:07:37,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 12:07:37,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 12:07:37,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 12:07:37,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 12:07:37,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 12:07:37,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 12:07:37,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 12:07:37,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 12:07:37,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 12:07:37,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 12:07:37,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 12:07:37,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 12:07:37,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 12:07:37,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 12:07:37,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 12:07:37,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 12:07:37,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 12:07:37,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 12:07:37,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 12:07:37,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 12:07:37,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 12:07:37,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 12:07:37,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 12:07:37,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 12:07:37,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 12:07:37,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 12:07:37,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 12:07:37,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 12:07:37,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 12:07:37,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 12:07:37,245 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 12:07:37,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 12:07:37,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 12:07:37,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 12:07:37,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 12:07:37,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 12:07:37,252 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 12:07:37,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 12:07:37,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 12:07:37,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 12:07:37,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 12:07:37,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 12:07:37,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 12:07:37,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 12:07:37,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 12:07:37,257 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 12:07:37,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 12:07:37,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 12:07:37,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 12:07:37,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 12:07:37,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 12:07:37,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 12:07:37,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:07:37,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 12:07:37,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 12:07:37,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 12:07:37,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 12:07:37,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 12:07:37,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 12:07:37,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 12:07:37,261 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41858035b0eac500692d816b890f84e56e392c8a [2021-10-03 12:07:37,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 12:07:37,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 12:07:37,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 12:07:37,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 12:07:37,761 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 12:07:37,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel/misc-3.wvr.c [2021-10-03 12:07:37,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d14c74b01/f9cd70e7041f406b9a48e0bbb8dafbf9/FLAG4a5faaa17 [2021-10-03 12:07:38,489 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 12:07:38,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-3.wvr.c [2021-10-03 12:07:38,490 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:07:38,490 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:07:38,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d14c74b01/f9cd70e7041f406b9a48e0bbb8dafbf9/FLAG4a5faaa17 [2021-10-03 12:07:38,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d14c74b01/f9cd70e7041f406b9a48e0bbb8dafbf9 [2021-10-03 12:07:38,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 12:07:38,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 12:07:38,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 12:07:38,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 12:07:38,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 12:07:38,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e0699c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38, skipping insertion in model container [2021-10-03 12:07:38,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 12:07:38,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 12:07:38,690 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:07:38,739 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-3.wvr.c[1286,1299] [2021-10-03 12:07:38,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:07:38,755 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 12:07:38,767 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:07:38,780 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-3.wvr.c[1286,1299] [2021-10-03 12:07:38,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:07:38,798 INFO L208 MainTranslator]: Completed translation [2021-10-03 12:07:38,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38 WrapperNode [2021-10-03 12:07:38,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 12:07:38,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 12:07:38,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 12:07:38,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 12:07:38,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 12:07:38,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 12:07:38,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 12:07:38,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 12:07:38,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 12:07:38,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 12:07:38,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 12:07:38,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 12:07:38,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (1/1) ... [2021-10-03 12:07:38,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:07:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:07:38,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-03 12:07:38,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-03 12:07:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 12:07:39,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 12:07:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 12:07:39,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 12:07:39,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 12:07:39,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 12:07:39,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 12:07:39,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 12:07:39,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 12:07:39,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 12:07:39,048 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 12:07:39,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 12:07:39,406 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-03 12:07:39,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:07:39 BoogieIcfgContainer [2021-10-03 12:07:39,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 12:07:39,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 12:07:39,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 12:07:39,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 12:07:39,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 12:07:38" (1/3) ... [2021-10-03 12:07:39,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf1a7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:07:39, skipping insertion in model container [2021-10-03 12:07:39,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:07:38" (2/3) ... [2021-10-03 12:07:39,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf1a7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:07:39, skipping insertion in model container [2021-10-03 12:07:39,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:07:39" (3/3) ... [2021-10-03 12:07:39,431 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3.wvr.c [2021-10-03 12:07:39,439 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 12:07:39,439 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 12:07:39,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 12:07:39,439 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 12:07:39,478 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,479 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,479 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,479 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,480 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,480 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,480 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,481 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,481 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,481 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,482 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,482 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,482 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,482 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,483 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,486 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,486 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,487 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,487 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,488 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,488 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,489 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,489 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,489 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,490 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,490 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,490 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,494 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,494 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,494 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,495 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,495 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,499 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,500 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,500 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:07:39,509 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-03 12:07:39,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 12:07:39,578 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-03 12:07:39,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-03 12:07:39,597 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 12:07:39,611 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 99 transitions, 214 flow [2021-10-03 12:07:39,614 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 99 transitions, 214 flow [2021-10-03 12:07:39,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 99 transitions, 214 flow [2021-10-03 12:07:39,691 INFO L129 PetriNetUnfolder]: 12/97 cut-off events. [2021-10-03 12:07:39,691 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-03 12:07:39,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 12/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2021-10-03 12:07:39,701 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2021-10-03 12:07:43,148 INFO L131 LiptonReduction]: Checked pairs total: 1520 [2021-10-03 12:07:43,148 INFO L133 LiptonReduction]: Total number of compositions: 97 [2021-10-03 12:07:43,159 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 19 transitions, 54 flow [2021-10-03 12:07:43,177 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 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) [2021-10-03 12:07:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 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) [2021-10-03 12:07:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-03 12:07:43,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:43,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:43,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:43,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:43,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1232173675, now seen corresponding path program 1 times [2021-10-03 12:07:43,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:43,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157591892] [2021-10-03 12:07:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:43,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:43,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:43,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157591892] [2021-10-03 12:07:43,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157591892] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:07:43,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:07:43,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:07:43,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598151472] [2021-10-03 12:07:43,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:07:43,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:07:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:07:43,526 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-10-03 12:07:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:43,561 INFO L93 Difference]: Finished difference Result 42 states and 100 transitions. [2021-10-03 12:07:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:07:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-03 12:07:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:43,580 INFO L225 Difference]: With dead ends: 42 [2021-10-03 12:07:43,581 INFO L226 Difference]: Without dead ends: 42 [2021-10-03 12:07:43,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:07:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-03 12:07:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-03 12:07:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 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) [2021-10-03 12:07:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-10-03 12:07:43,630 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 11 [2021-10-03 12:07:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:43,632 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-10-03 12:07:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-10-03 12:07:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-10-03 12:07:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-03 12:07:43,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:43,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:43,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 12:07:43,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 311609225, now seen corresponding path program 1 times [2021-10-03 12:07:43,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:43,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349924187] [2021-10-03 12:07:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:43,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:07:43,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:43,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349924187] [2021-10-03 12:07:43,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349924187] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:07:43,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:07:43,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:07:43,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232842604] [2021-10-03 12:07:43,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:07:43,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:07:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:07:43,744 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:07:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:43,760 INFO L93 Difference]: Finished difference Result 50 states and 127 transitions. [2021-10-03 12:07:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:07:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-03 12:07:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:43,762 INFO L225 Difference]: With dead ends: 50 [2021-10-03 12:07:43,762 INFO L226 Difference]: Without dead ends: 50 [2021-10-03 12:07:43,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:07:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-03 12:07:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-03 12:07:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 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) [2021-10-03 12:07:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 127 transitions. [2021-10-03 12:07:43,782 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 127 transitions. Word has length 12 [2021-10-03 12:07:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:43,782 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 127 transitions. [2021-10-03 12:07:43,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:07:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 127 transitions. [2021-10-03 12:07:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:07:43,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:43,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:43,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 12:07:43,785 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2117589458, now seen corresponding path program 1 times [2021-10-03 12:07:43,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:43,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777575110] [2021-10-03 12:07:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:43,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:07:43,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:43,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777575110] [2021-10-03 12:07:43,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777575110] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:07:43,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:07:43,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:07:43,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399446871] [2021-10-03 12:07:43,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:07:43,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:07:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:07:43,978 INFO L87 Difference]: Start difference. First operand 50 states and 127 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-10-03 12:07:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:44,010 INFO L93 Difference]: Finished difference Result 54 states and 132 transitions. [2021-10-03 12:07:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:07:44,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-10-03 12:07:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:44,012 INFO L225 Difference]: With dead ends: 54 [2021-10-03 12:07:44,013 INFO L226 Difference]: Without dead ends: 54 [2021-10-03 12:07:44,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:07:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-03 12:07:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-10-03 12:07:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 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) [2021-10-03 12:07:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2021-10-03 12:07:44,024 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2021-10-03 12:07:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:44,024 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2021-10-03 12:07:44,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-10-03 12:07:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2021-10-03 12:07:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:07:44,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:44,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:44,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 12:07:44,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1049309454, now seen corresponding path program 2 times [2021-10-03 12:07:44,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:44,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146001447] [2021-10-03 12:07:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:44,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:44,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:44,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146001447] [2021-10-03 12:07:44,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146001447] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:07:44,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:07:44,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:07:44,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588856287] [2021-10-03 12:07:44,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:07:44,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:44,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:07:44,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:07:44,211 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-10-03 12:07:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:44,243 INFO L93 Difference]: Finished difference Result 54 states and 128 transitions. [2021-10-03 12:07:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:07:44,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-10-03 12:07:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:44,246 INFO L225 Difference]: With dead ends: 54 [2021-10-03 12:07:44,246 INFO L226 Difference]: Without dead ends: 54 [2021-10-03 12:07:44,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:07:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-03 12:07:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-10-03 12:07:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4285714285714284) internal successors, (119), 49 states have internal predecessors, (119), 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) [2021-10-03 12:07:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2021-10-03 12:07:44,256 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 14 [2021-10-03 12:07:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:44,256 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2021-10-03 12:07:44,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-10-03 12:07:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2021-10-03 12:07:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 12:07:44,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:44,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:44,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-03 12:07:44,259 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash -908117957, now seen corresponding path program 1 times [2021-10-03 12:07:44,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:44,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891904581] [2021-10-03 12:07:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:44,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:44,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:44,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891904581] [2021-10-03 12:07:44,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891904581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:07:44,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:07:44,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:07:44,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250560540] [2021-10-03 12:07:44,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:07:44,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:07:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:07:44,449 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-03 12:07:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:44,471 INFO L93 Difference]: Finished difference Result 58 states and 146 transitions. [2021-10-03 12:07:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:07:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-10-03 12:07:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:44,474 INFO L225 Difference]: With dead ends: 58 [2021-10-03 12:07:44,474 INFO L226 Difference]: Without dead ends: 58 [2021-10-03 12:07:44,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:07:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-03 12:07:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-03 12:07:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.56140350877193) internal successors, (146), 57 states have internal predecessors, (146), 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) [2021-10-03 12:07:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 146 transitions. [2021-10-03 12:07:44,482 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 146 transitions. Word has length 14 [2021-10-03 12:07:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:44,483 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 146 transitions. [2021-10-03 12:07:44,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-03 12:07:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 146 transitions. [2021-10-03 12:07:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:07:44,485 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:44,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:44,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-03 12:07:44,486 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:44,487 INFO L82 PathProgramCache]: Analyzing trace with hash 397418002, now seen corresponding path program 1 times [2021-10-03 12:07:44,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:44,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506111986] [2021-10-03 12:07:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:44,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:07:44,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:44,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506111986] [2021-10-03 12:07:44,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506111986] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:44,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989336161] [2021-10-03 12:07:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:44,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:07:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:07:44,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:07:44,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-03 12:07:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-03 12:07:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:07:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:45,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989336161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:45,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:07:45,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-10-03 12:07:45,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429625069] [2021-10-03 12:07:45,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 12:07:45,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 12:07:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:07:45,179 INFO L87 Difference]: Start difference. First operand 58 states and 146 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-10-03 12:07:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:45,280 INFO L93 Difference]: Finished difference Result 110 states and 261 transitions. [2021-10-03 12:07:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 12:07:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 16 [2021-10-03 12:07:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:45,284 INFO L225 Difference]: With dead ends: 110 [2021-10-03 12:07:45,285 INFO L226 Difference]: Without dead ends: 110 [2021-10-03 12:07:45,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-03 12:07:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-03 12:07:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 74. [2021-10-03 12:07:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5616438356164384) internal successors, (187), 73 states have internal predecessors, (187), 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) [2021-10-03 12:07:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2021-10-03 12:07:45,297 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 16 [2021-10-03 12:07:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:45,297 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2021-10-03 12:07:45,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-10-03 12:07:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2021-10-03 12:07:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:07:45,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:45,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:45,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-03 12:07:45,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:07:45,513 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash -490413260, now seen corresponding path program 2 times [2021-10-03 12:07:45,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:45,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544419874] [2021-10-03 12:07:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:45,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:07:45,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:45,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544419874] [2021-10-03 12:07:45,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544419874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:45,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331122457] [2021-10-03 12:07:45,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:07:45,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:07:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:07:45,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:07:45,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-03 12:07:45,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:07:45,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:07:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-03 12:07:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:07:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:07:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331122457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:45,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:07:45,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-03 12:07:45,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698972299] [2021-10-03 12:07:45,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 12:07:45,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 12:07:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:07:45,839 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-10-03 12:07:45,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:45,941 INFO L93 Difference]: Finished difference Result 129 states and 328 transitions. [2021-10-03 12:07:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 12:07:45,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2021-10-03 12:07:45,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:45,944 INFO L225 Difference]: With dead ends: 129 [2021-10-03 12:07:45,945 INFO L226 Difference]: Without dead ends: 124 [2021-10-03 12:07:45,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-03 12:07:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-03 12:07:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2021-10-03 12:07:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.670103092783505) internal successors, (259), 97 states have internal predecessors, (259), 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) [2021-10-03 12:07:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 259 transitions. [2021-10-03 12:07:45,973 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 259 transitions. Word has length 16 [2021-10-03 12:07:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:45,973 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 259 transitions. [2021-10-03 12:07:45,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-10-03 12:07:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 259 transitions. [2021-10-03 12:07:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-03 12:07:45,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:45,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:46,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-03 12:07:46,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-03 12:07:46,195 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1806570564, now seen corresponding path program 3 times [2021-10-03 12:07:46,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:46,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179391490] [2021-10-03 12:07:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:46,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:46,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:46,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179391490] [2021-10-03 12:07:46,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179391490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:46,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993792162] [2021-10-03 12:07:46,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:07:46,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:07:46,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:07:46,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:07:46,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-03 12:07:46,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:07:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:07:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-03 12:07:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:07:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:46,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993792162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:46,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:07:46,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-03 12:07:46,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523231553] [2021-10-03 12:07:46,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-03 12:07:46,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:46,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-03 12:07:46,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:07:46,740 INFO L87 Difference]: Start difference. First operand 98 states and 259 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-10-03 12:07:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:46,805 INFO L93 Difference]: Finished difference Result 144 states and 387 transitions. [2021-10-03 12:07:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:07:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 16 [2021-10-03 12:07:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:46,808 INFO L225 Difference]: With dead ends: 144 [2021-10-03 12:07:46,808 INFO L226 Difference]: Without dead ends: 144 [2021-10-03 12:07:46,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-10-03 12:07:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-03 12:07:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2021-10-03 12:07:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.6837606837606836) internal successors, (314), 117 states have internal predecessors, (314), 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) [2021-10-03 12:07:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 314 transitions. [2021-10-03 12:07:46,825 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 314 transitions. Word has length 16 [2021-10-03 12:07:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:46,826 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 314 transitions. [2021-10-03 12:07:46,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-10-03 12:07:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 314 transitions. [2021-10-03 12:07:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:07:46,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:46,828 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:46,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-03 12:07:47,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:07:47,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1382728070, now seen corresponding path program 4 times [2021-10-03 12:07:47,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:47,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360660146] [2021-10-03 12:07:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:47,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:07:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:47,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:07:47,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360660146] [2021-10-03 12:07:47,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360660146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:47,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464201134] [2021-10-03 12:07:47,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:07:47,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:07:47,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:07:47,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:07:47,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-03 12:07:47,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:07:47,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:07:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-03 12:07:47,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:07:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:07:47,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464201134] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:07:47,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:07:47,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-03 12:07:47,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775598430] [2021-10-03 12:07:47,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:07:47,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:07:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:07:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:07:47,739 INFO L87 Difference]: Start difference. First operand 118 states and 314 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2021-10-03 12:07:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:07:48,038 INFO L93 Difference]: Finished difference Result 209 states and 525 transitions. [2021-10-03 12:07:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:07:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-03 12:07:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:07:48,041 INFO L225 Difference]: With dead ends: 209 [2021-10-03 12:07:48,041 INFO L226 Difference]: Without dead ends: 170 [2021-10-03 12:07:48,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:07:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-03 12:07:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 106. [2021-10-03 12:07:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5619047619047617) internal successors, (269), 105 states have internal predecessors, (269), 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) [2021-10-03 12:07:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 269 transitions. [2021-10-03 12:07:48,050 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 269 transitions. Word has length 17 [2021-10-03 12:07:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:07:48,050 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 269 transitions. [2021-10-03 12:07:48,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2021-10-03 12:07:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 269 transitions. [2021-10-03 12:07:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:07:48,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:07:48,052 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:07:48,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-03 12:07:48,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:07:48,267 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:07:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:07:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash 476516376, now seen corresponding path program 5 times [2021-10-03 12:07:48,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:07:48,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244540742] [2021-10-03 12:07:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:07:48,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:07:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-03 12:07:48,308 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-03 12:07:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-03 12:07:48,427 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-03 12:07:48,428 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-03 12:07:48,429 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 12:07:48,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 12:07:48,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 12:07:48,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-03 12:07:48,440 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 12:07:48,440 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 12:07:48,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 12:07:48 BasicIcfg [2021-10-03 12:07:48,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 12:07:48,510 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 12:07:48,510 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 12:07:48,510 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 12:07:48,511 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:07:39" (3/4) ... [2021-10-03 12:07:48,513 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-03 12:07:48,604 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 12:07:48,604 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 12:07:48,606 INFO L168 Benchmark]: Toolchain (without parser) took 10086.22 ms. Allocated memory was 41.9 MB in the beginning and 88.1 MB in the end (delta: 46.1 MB). Free memory was 18.5 MB in the beginning and 52.8 MB in the end (delta: -34.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-03 12:07:48,606 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 26.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:07:48,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.69 ms. Allocated memory is still 41.9 MB. Free memory was 18.3 MB in the beginning and 19.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-03 12:07:48,611 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.94 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 17.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:07:48,611 INFO L168 Benchmark]: Boogie Preprocessor took 66.46 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.8 MB in the beginning and 34.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2021-10-03 12:07:48,612 INFO L168 Benchmark]: RCFGBuilder took 481.66 ms. Allocated memory is still 50.3 MB. Free memory was 34.9 MB in the beginning and 23.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-03 12:07:48,612 INFO L168 Benchmark]: TraceAbstraction took 9097.58 ms. Allocated memory was 50.3 MB in the beginning and 88.1 MB in the end (delta: 37.7 MB). Free memory was 23.2 MB in the beginning and 57.0 MB in the end (delta: -33.7 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. [2021-10-03 12:07:48,613 INFO L168 Benchmark]: Witness Printer took 93.94 ms. Allocated memory is still 88.1 MB. Free memory was 57.0 MB in the beginning and 52.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:07:48,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 26.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.69 ms. Allocated memory is still 41.9 MB. Free memory was 18.3 MB in the beginning and 19.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.94 ms. Allocated memory is still 41.9 MB. Free memory was 19.5 MB in the beginning and 17.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.46 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.8 MB in the beginning and 34.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. * RCFGBuilder took 481.66 ms. Allocated memory is still 50.3 MB. Free memory was 34.9 MB in the beginning and 23.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9097.58 ms. Allocated memory was 50.3 MB in the beginning and 88.1 MB in the end (delta: 37.7 MB). Free memory was 23.2 MB in the beginning and 57.0 MB in the end (delta: -33.7 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. * Witness Printer took 93.94 ms. Allocated memory is still 88.1 MB. Free memory was 57.0 MB in the beginning and 52.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3534.0ms, 94 PlacesBefore, 23 PlacesAfterwards, 99 TransitionsBefore, 19 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 9 ChoiceCompositions, 97 TotalNumberOfCompositions, 1520 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1366, positive: 1336, positive conditional: 0, positive unconditional: 1336, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 930, positive: 908, positive conditional: 0, positive unconditional: 908, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 930, positive: 908, positive conditional: 0, positive unconditional: 908, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 22, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 96, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 96, negative conditional: 0, negative unconditional: 96, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1366, positive: 428, positive conditional: 0, positive unconditional: 428, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 930, unknown conditional: 0, unknown unconditional: 930] , Statistics on independence cache: Total cache size (in pairs): 41, Positive cache size: 37, Positive conditional cache size: 0, Positive unconditional cache size: 37, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 79]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] 0 int pos; [L16] 0 _Bool d1, d2, g1, g2; [L61] 0 pthread_t t1, t2; [L64] 0 pos = __VERIFIER_nondet_int() [L65] 0 d1 = __VERIFIER_nondet_bool() [L66] 0 d2 = __VERIFIER_nondet_bool() [L67] 0 g1 = __VERIFIER_nondet_bool() [L68] 0 g2 = __VERIFIER_nondet_bool() [L12] COND FALSE 0 !(!cond) [L73] FCALL, FORK 0 pthread_create(&t1, NULL, thread1, NULL) VAL [d1=1, d2=1, g1=1, g2=1, pos=0] [L74] FCALL, FORK 0 pthread_create(&t2, NULL, thread2, NULL) VAL [d1=1, d2=1, g1=1, g2=1, pos=0] [L40] COND TRUE 2 \read(g2) [L41] COND TRUE 2 \read(d2) [L42] 2 pos = ( pos + 2 ) [L49] 2 d2 = !d2 [L50] COND FALSE 2 !(\read(d2)) VAL [__VERIFIER_nondet_bool()=-255, d1=1, d2=0, g1=1, g2=1, pos=2] [L19] COND TRUE 1 \read(g1) [L20] COND TRUE 1 \read(d1) [L21] 1 pos++ VAL [__VERIFIER_nondet_bool()=-255, d1=1, d2=0, g1=1, g2=1, pos=2, pos++=2] [L40] COND TRUE 2 \read(g2) [L41] COND FALSE 2 !(\read(d2)) [L46] 2 pos = ( pos - 2 ) [L49] 2 d2 = !d2 [L50] COND TRUE 2 \read(d2) [L51] COND TRUE 2 __VERIFIER_nondet_bool() [L52] 2 g2 = 0 VAL [__VERIFIER_nondet_bool()=-255, d1=1, d2=1, g1=1, g2=0, pos=0, pos++=2] [L21] 1 pos++ [L28] 1 d1 = !d1 [L29] COND FALSE 1 !(\read(d1)) VAL [__VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool()=-255, d1=0, d2=1, g1=1, g2=0, pos=3] [L19] COND TRUE 1 \read(g1) [L20] COND FALSE 1 !(\read(d1)) [L25] 1 pos-- [L28] 1 d1 = !d1 [L29] COND TRUE 1 \read(d1) [L30] COND TRUE 1 __VERIFIER_nondet_bool() [L31] 1 g1 = 0 VAL [__VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool()=-255, d1=1, d2=1, g1=0, g2=0, pos=2] [L19] COND FALSE 1 !(\read(g1)) [L36] 1 return 0; [L40] COND FALSE 2 !(\read(g2)) [L57] 2 return 0; [L75] 0 \read(t1) VAL [\result={0:0}, \result={0:0}, __VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool()=-255, d1=1, d2=1, g1=0, g2=0, pos=2] [L75] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\result={0:0}, \result={0:0}, __VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool()=-255, d1=1, d2=1, g1=0, g2=0, pos=2] [L76] 0 \read(t2) VAL [\result={0:0}, \result={0:0}, __VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool()=-255, d1=1, d2=1, g1=0, g2=0, pos=2] [L76] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\result={0:0}, \result={0:0}, __VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool()=-255, d1=1, d2=1, g1=0, g2=0, pos=2] [L12] COND FALSE 0 !(!cond) [L79] 0 reach_error() VAL [\result={0:0}, \result={0:0}, __VERIFIER_nondet_bool()=-255, __VERIFIER_nondet_bool()=-255, d1=1, d2=1, g1=0, g2=0, pos=2] - UnprovableResult [Line: 74]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 73]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 120 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 8869.9ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 34.5ms, AutomataDifference: 790.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3599.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 150 SDtfs, 259 SDslu, 387 SDs, 0 SdLazy, 276 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 385.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 528.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=8, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 137.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 160 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 52.2ms SsaConstructionTime, 614.9ms SatisfiabilityAnalysisTime, 2194.4ms InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 182 ConstructedInterpolants, 0 QuantifiedInterpolants, 1942 SizeOfPredicates, 29 NumberOfNonLiveVariables, 386 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 13/43 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-03 12:07:48,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...