./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 2052cbc9567a13544119e06f05cbef43da200937 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 21:04:19,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 21:04:19,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 21:04:19,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 21:04:19,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 21:04:19,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 21:04:19,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 21:04:19,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 21:04:19,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 21:04:19,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 21:04:19,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 21:04:19,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 21:04:19,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 21:04:19,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 21:04:19,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 21:04:19,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 21:04:19,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 21:04:19,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 21:04:19,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 21:04:19,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 21:04:19,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 21:04:19,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 21:04:19,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 21:04:19,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 21:04:19,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 21:04:19,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 21:04:19,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 21:04:19,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 21:04:19,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 21:04:19,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 21:04:19,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 21:04:19,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 21:04:19,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 21:04:19,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 21:04:19,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 21:04:19,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 21:04:19,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 21:04:19,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 21:04:19,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 21:04:19,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 21:04:19,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 21:04:19,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 21:04:19,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 21:04:19,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 21:04:19,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 21:04:19,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 21:04:19,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 21:04:19,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 21:04:19,590 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 21:04:19,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 21:04:19,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 21:04:19,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 21:04:19,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 21:04:19,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 21:04:19,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 21:04:19,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 21:04:19,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 21:04:19,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 21:04:19,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 21:04:19,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 21:04:19,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 21:04:19,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 21:04:19,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 21:04:19,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 21:04:19,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:04:19,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 21:04:19,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 21:04:19,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 21:04:19,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 21:04:19,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 21:04:19,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 21:04:19,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 21:04:19,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2052cbc9567a13544119e06f05cbef43da200937 [2021-10-05 21:04:19,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 21:04:20,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 21:04:20,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 21:04:20,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 21:04:20,012 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 21:04:20,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel/misc-3.wvr.c [2021-10-05 21:04:20,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159279c43/0017dc856fa4451b99842dce5e7d8ac6/FLAGab5d47822 [2021-10-05 21:04:20,699 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 21:04:20,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-3.wvr.c [2021-10-05 21:04:20,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159279c43/0017dc856fa4451b99842dce5e7d8ac6/FLAGab5d47822 [2021-10-05 21:04:21,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159279c43/0017dc856fa4451b99842dce5e7d8ac6 [2021-10-05 21:04:21,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 21:04:21,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 21:04:21,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 21:04:21,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 21:04:21,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 21:04:21,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aafa859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21, skipping insertion in model container [2021-10-05 21:04:21,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 21:04:21,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 21:04:21,406 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[2254,2267] [2021-10-05 21:04:21,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:04:21,420 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 21:04:21,445 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[2254,2267] [2021-10-05 21:04:21,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:04:21,462 INFO L208 MainTranslator]: Completed translation [2021-10-05 21:04:21,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21 WrapperNode [2021-10-05 21:04:21,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 21:04:21,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 21:04:21,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 21:04:21,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 21:04:21,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,482 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 21:04:21,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 21:04:21,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 21:04:21,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 21:04:21,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 21:04:21,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 21:04:21,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 21:04:21,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 21:04:21,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (1/1) ... [2021-10-05 21:04:21,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:04:21,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:21,620 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) [2021-10-05 21:04:21,634 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 [2021-10-05 21:04:21,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 21:04:21,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 21:04:21,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 21:04:21,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 21:04:21,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 21:04:21,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 21:04:21,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 21:04:21,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 21:04:21,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 21:04:21,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 21:04:21,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 21:04:21,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 21:04:21,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 21:04:21,682 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 21:04:22,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 21:04:22,171 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-05 21:04:22,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:04:22 BoogieIcfgContainer [2021-10-05 21:04:22,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 21:04:22,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 21:04:22,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 21:04:22,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 21:04:22,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 09:04:21" (1/3) ... [2021-10-05 21:04:22,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419dd18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:04:22, skipping insertion in model container [2021-10-05 21:04:22,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:04:21" (2/3) ... [2021-10-05 21:04:22,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419dd18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:04:22, skipping insertion in model container [2021-10-05 21:04:22,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:04:22" (3/3) ... [2021-10-05 21:04:22,183 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3.wvr.c [2021-10-05 21:04:22,188 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 21:04:22,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 21:04:22,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 21:04:22,189 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 21:04:22,223 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,224 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,224 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,224 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,225 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,225 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,225 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,226 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,226 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,226 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,228 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,228 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,229 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,229 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,229 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,230 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,231 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,231 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,231 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,231 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,232 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,232 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,232 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,232 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,236 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,236 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,236 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,237 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,237 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,240 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,240 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,240 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:04:22,251 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 21:04:22,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 21:04:22,314 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 [2021-10-05 21:04:22,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 21:04:22,344 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 21:04:22,359 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 86 transitions, 188 flow [2021-10-05 21:04:22,363 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 86 transitions, 188 flow [2021-10-05 21:04:22,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 86 transitions, 188 flow [2021-10-05 21:04:22,486 INFO L129 PetriNetUnfolder]: 11/84 cut-off events. [2021-10-05 21:04:22,486 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 21:04:22,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 11/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2021-10-05 21:04:22,501 INFO L116 LiptonReduction]: Number of co-enabled transitions 1088 [2021-10-05 21:04:25,899 INFO L131 LiptonReduction]: Checked pairs total: 1023 [2021-10-05 21:04:25,899 INFO L133 LiptonReduction]: Total number of compositions: 81 [2021-10-05 21:04:25,909 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-05 21:04:25,922 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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) [2021-10-05 21:04:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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) [2021-10-05 21:04:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 21:04:25,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:25,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:25,931 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 848718317, now seen corresponding path program 1 times [2021-10-05 21:04:25,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:25,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496442039] [2021-10-05 21:04:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:25,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:26,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:26,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496442039] [2021-10-05 21:04:26,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496442039] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:04:26,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:04:26,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 21:04:26,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997920727] [2021-10-05 21:04:26,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 21:04:26,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 21:04:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:04:26,184 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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) [2021-10-05 21:04:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:26,207 INFO L93 Difference]: Finished difference Result 26 states and 54 transitions. [2021-10-05 21:04:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 21:04:26,209 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 [2021-10-05 21:04:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:26,220 INFO L225 Difference]: With dead ends: 26 [2021-10-05 21:04:26,220 INFO L226 Difference]: Without dead ends: 26 [2021-10-05 21:04:26,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:04:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-05 21:04:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-05 21:04:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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) [2021-10-05 21:04:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2021-10-05 21:04:26,270 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 11 [2021-10-05 21:04:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:26,271 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2021-10-05 21:04:26,271 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) [2021-10-05 21:04:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2021-10-05 21:04:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-05 21:04:26,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:26,272 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:26,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 21:04:26,273 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1589020178, now seen corresponding path program 1 times [2021-10-05 21:04:26,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:26,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633975621] [2021-10-05 21:04:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:26,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:04:26,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:26,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633975621] [2021-10-05 21:04:26,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633975621] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:04:26,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:04:26,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 21:04:26,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085232215] [2021-10-05 21:04:26,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 21:04:26,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 21:04:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:04:26,361 INFO L87 Difference]: Start difference. First operand 26 states and 54 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) [2021-10-05 21:04:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:26,373 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-05 21:04:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 21:04:26,374 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 [2021-10-05 21:04:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:26,377 INFO L225 Difference]: With dead ends: 34 [2021-10-05 21:04:26,379 INFO L226 Difference]: Without dead ends: 34 [2021-10-05 21:04:26,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:04:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-05 21:04:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-05 21:04:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 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) [2021-10-05 21:04:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-05 21:04:26,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 12 [2021-10-05 21:04:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:26,394 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-05 21:04:26,395 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) [2021-10-05 21:04:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-05 21:04:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:04:26,397 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:26,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:26,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 21:04:26,399 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2067944405, now seen corresponding path program 1 times [2021-10-05 21:04:26,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:26,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431466206] [2021-10-05 21:04:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:26,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:26,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:26,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431466206] [2021-10-05 21:04:26,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431466206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:26,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101860850] [2021-10-05 21:04:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:26,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:26,557 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) [2021-10-05 21:04:26,580 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 [2021-10-05 21:04:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-05 21:04:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:26,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101860850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:26,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:26,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-10-05 21:04:26,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994031374] [2021-10-05 21:04:26,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:04:26,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:04:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:04:26,819 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-10-05 21:04:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:26,842 INFO L93 Difference]: Finished difference Result 42 states and 92 transitions. [2021-10-05 21:04:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:04:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 13 [2021-10-05 21:04:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:26,853 INFO L225 Difference]: With dead ends: 42 [2021-10-05 21:04:26,853 INFO L226 Difference]: Without dead ends: 42 [2021-10-05 21:04:26,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:04:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-05 21:04:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-05 21:04:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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) [2021-10-05 21:04:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 92 transitions. [2021-10-05 21:04:26,866 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 92 transitions. Word has length 13 [2021-10-05 21:04:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:26,869 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 92 transitions. [2021-10-05 21:04:26,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-10-05 21:04:26,869 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 92 transitions. [2021-10-05 21:04:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:04:26,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:26,871 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:26,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:27,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:27,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1811251344, now seen corresponding path program 2 times [2021-10-05 21:04:27,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:27,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981877773] [2021-10-05 21:04:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:27,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:04:27,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:27,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981877773] [2021-10-05 21:04:27,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981877773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:27,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671227759] [2021-10-05 21:04:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:04:27,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:27,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:27,248 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) [2021-10-05 21:04:27,264 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 [2021-10-05 21:04:27,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:04:27,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 21:04:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:04:27,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671227759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:27,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:27,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-10-05 21:04:27,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36649512] [2021-10-05 21:04:27,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:04:27,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:27,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:04:27,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:04:27,640 INFO L87 Difference]: Start difference. First operand 42 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:04:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:27,676 INFO L93 Difference]: Finished difference Result 52 states and 116 transitions. [2021-10-05 21:04:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:04:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:04:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:27,678 INFO L225 Difference]: With dead ends: 52 [2021-10-05 21:04:27,678 INFO L226 Difference]: Without dead ends: 52 [2021-10-05 21:04:27,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-05 21:04:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-05 21:04:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-05 21:04:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 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) [2021-10-05 21:04:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 116 transitions. [2021-10-05 21:04:27,687 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 116 transitions. Word has length 14 [2021-10-05 21:04:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:27,688 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 116 transitions. [2021-10-05 21:04:27,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:04:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 116 transitions. [2021-10-05 21:04:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:04:27,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:27,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:27,730 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 [2021-10-05 21:04:27,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:27,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1799034477, now seen corresponding path program 3 times [2021-10-05 21:04:27,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:27,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445789620] [2021-10-05 21:04:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:27,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:28,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:28,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445789620] [2021-10-05 21:04:28,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445789620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:28,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933126283] [2021-10-05 21:04:28,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:04:28,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:28,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:28,316 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) [2021-10-05 21:04:28,319 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 [2021-10-05 21:04:28,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 21:04:28,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:28,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 21:04:28,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:28,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933126283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:28,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:28,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-05 21:04:28,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512452191] [2021-10-05 21:04:28,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:04:28,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:28,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:04:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:04:28,762 INFO L87 Difference]: Start difference. First operand 52 states and 116 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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) [2021-10-05 21:04:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:29,189 INFO L93 Difference]: Finished difference Result 152 states and 336 transitions. [2021-10-05 21:04:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-05 21:04:29,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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 15 [2021-10-05 21:04:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:29,192 INFO L225 Difference]: With dead ends: 152 [2021-10-05 21:04:29,192 INFO L226 Difference]: Without dead ends: 142 [2021-10-05 21:04:29,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:04:29,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-05 21:04:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 70. [2021-10-05 21:04:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 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) [2021-10-05 21:04:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-10-05 21:04:29,212 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 15 [2021-10-05 21:04:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:29,213 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-10-05 21:04:29,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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) [2021-10-05 21:04:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-10-05 21:04:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:04:29,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:29,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:29,253 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 [2021-10-05 21:04:29,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:29,430 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:29,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:29,431 INFO L82 PathProgramCache]: Analyzing trace with hash -493695473, now seen corresponding path program 4 times [2021-10-05 21:04:29,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:29,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055834843] [2021-10-05 21:04:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:29,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:29,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:29,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055834843] [2021-10-05 21:04:29,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055834843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:29,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656655307] [2021-10-05 21:04:29,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:04:29,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:29,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:29,817 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) [2021-10-05 21:04:29,836 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 [2021-10-05 21:04:29,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:04:29,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 21:04:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:30,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656655307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:30,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:30,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-05 21:04:30,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270862825] [2021-10-05 21:04:30,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:04:30,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:04:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:04:30,264 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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) [2021-10-05 21:04:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:30,688 INFO L93 Difference]: Finished difference Result 146 states and 333 transitions. [2021-10-05 21:04:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:04:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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 15 [2021-10-05 21:04:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:30,691 INFO L225 Difference]: With dead ends: 146 [2021-10-05 21:04:30,691 INFO L226 Difference]: Without dead ends: 136 [2021-10-05 21:04:30,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:04:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-05 21:04:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2021-10-05 21:04:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.6626506024096384) internal successors, (221), 83 states have internal predecessors, (221), 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) [2021-10-05 21:04:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 221 transitions. [2021-10-05 21:04:30,703 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 221 transitions. Word has length 15 [2021-10-05 21:04:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:30,703 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 221 transitions. [2021-10-05 21:04:30,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 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) [2021-10-05 21:04:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 221 transitions. [2021-10-05 21:04:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:04:30,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:30,706 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:30,757 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 [2021-10-05 21:04:30,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:30,933 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:30,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1083584305, now seen corresponding path program 5 times [2021-10-05 21:04:30,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:30,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976673073] [2021-10-05 21:04:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:30,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:31,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:31,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976673073] [2021-10-05 21:04:31,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976673073] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:31,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675395121] [2021-10-05 21:04:31,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:04:31,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:31,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:31,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:31,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 21:04:31,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 21:04:31,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:31,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 21:04:31,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675395121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:31,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:31,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-05 21:04:31,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413869054] [2021-10-05 21:04:31,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:04:31,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:31,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:04:31,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:04:31,656 INFO L87 Difference]: Start difference. First operand 84 states and 221 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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) [2021-10-05 21:04:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:31,810 INFO L93 Difference]: Finished difference Result 198 states and 484 transitions. [2021-10-05 21:04:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:04:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 15 [2021-10-05 21:04:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:31,812 INFO L225 Difference]: With dead ends: 198 [2021-10-05 21:04:31,812 INFO L226 Difference]: Without dead ends: 156 [2021-10-05 21:04:31,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:04:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-05 21:04:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 106. [2021-10-05 21:04:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.7333333333333334) internal successors, (287), 105 states have internal predecessors, (287), 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) [2021-10-05 21:04:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 287 transitions. [2021-10-05 21:04:31,823 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 287 transitions. Word has length 15 [2021-10-05 21:04:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:31,824 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 287 transitions. [2021-10-05 21:04:31,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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) [2021-10-05 21:04:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 287 transitions. [2021-10-05 21:04:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:04:31,825 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:31,825 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:31,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-05 21:04:32,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:32,039 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1446120109, now seen corresponding path program 6 times [2021-10-05 21:04:32,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:32,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959750205] [2021-10-05 21:04:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:32,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:32,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:32,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959750205] [2021-10-05 21:04:32,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959750205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:32,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380007951] [2021-10-05 21:04:32,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:04:32,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:32,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:32,299 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:32,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 21:04:32,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:04:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:32,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:04:32,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:33,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380007951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:33,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:33,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-05 21:04:33,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207508304] [2021-10-05 21:04:33,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:04:33,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:04:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:04:33,019 INFO L87 Difference]: Start difference. First operand 106 states and 287 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2021-10-05 21:04:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:33,496 INFO L93 Difference]: Finished difference Result 179 states and 434 transitions. [2021-10-05 21:04:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 21:04:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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 15 [2021-10-05 21:04:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:33,498 INFO L225 Difference]: With dead ends: 179 [2021-10-05 21:04:33,499 INFO L226 Difference]: Without dead ends: 156 [2021-10-05 21:04:33,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-10-05 21:04:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-05 21:04:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2021-10-05 21:04:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.760330578512397) internal successors, (334), 121 states have internal predecessors, (334), 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) [2021-10-05 21:04:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 334 transitions. [2021-10-05 21:04:33,509 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 334 transitions. Word has length 15 [2021-10-05 21:04:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:33,509 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 334 transitions. [2021-10-05 21:04:33,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 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) [2021-10-05 21:04:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 334 transitions. [2021-10-05 21:04:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:04:33,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:33,511 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:33,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:33,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:33,725 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:33,726 INFO L82 PathProgramCache]: Analyzing trace with hash 339435501, now seen corresponding path program 7 times [2021-10-05 21:04:33,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:33,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639581637] [2021-10-05 21:04:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:33,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:33,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:33,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639581637] [2021-10-05 21:04:33,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639581637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:33,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146680169] [2021-10-05 21:04:33,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:04:33,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:33,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:33,930 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 21:04:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 21:04:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:34,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146680169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:34,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:34,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-05 21:04:34,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451699526] [2021-10-05 21:04:34,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:04:34,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:04:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:04:34,544 INFO L87 Difference]: Start difference. First operand 122 states and 334 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-05 21:04:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:34,738 INFO L93 Difference]: Finished difference Result 231 states and 577 transitions. [2021-10-05 21:04:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 21:04:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 15 [2021-10-05 21:04:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:34,741 INFO L225 Difference]: With dead ends: 231 [2021-10-05 21:04:34,741 INFO L226 Difference]: Without dead ends: 216 [2021-10-05 21:04:34,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:04:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-05 21:04:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 152. [2021-10-05 21:04:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.80794701986755) internal successors, (424), 151 states have internal predecessors, (424), 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) [2021-10-05 21:04:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 424 transitions. [2021-10-05 21:04:34,770 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 424 transitions. Word has length 15 [2021-10-05 21:04:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:34,772 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 424 transitions. [2021-10-05 21:04:34,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-05 21:04:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 424 transitions. [2021-10-05 21:04:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:04:34,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:34,776 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:34,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:34,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:34,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2048745232, now seen corresponding path program 8 times [2021-10-05 21:04:34,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:34,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139776077] [2021-10-05 21:04:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:34,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:04:35,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:35,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139776077] [2021-10-05 21:04:35,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139776077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:35,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714504172] [2021-10-05 21:04:35,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:04:35,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:35,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:35,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-05 21:04:35,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:04:35,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:35,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 21:04:35,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714504172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:35,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:35,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2021-10-05 21:04:35,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66831747] [2021-10-05 21:04:35,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:04:35,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:04:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:04:35,809 INFO L87 Difference]: Start difference. First operand 152 states and 424 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-05 21:04:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:36,087 INFO L93 Difference]: Finished difference Result 188 states and 503 transitions. [2021-10-05 21:04:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 21:04:36,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 [2021-10-05 21:04:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:36,089 INFO L225 Difference]: With dead ends: 188 [2021-10-05 21:04:36,089 INFO L226 Difference]: Without dead ends: 184 [2021-10-05 21:04:36,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:04:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-05 21:04:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 138. [2021-10-05 21:04:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.6715328467153285) internal successors, (366), 137 states have internal predecessors, (366), 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) [2021-10-05 21:04:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 366 transitions. [2021-10-05 21:04:36,096 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 366 transitions. Word has length 16 [2021-10-05 21:04:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:36,097 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 366 transitions. [2021-10-05 21:04:36,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-05 21:04:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 366 transitions. [2021-10-05 21:04:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:04:36,098 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:36,098 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:36,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-05 21:04:36,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-05 21:04:36,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:36,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:36,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2101468748, now seen corresponding path program 9 times [2021-10-05 21:04:36,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:36,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540127636] [2021-10-05 21:04:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:36,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:36,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:36,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540127636] [2021-10-05 21:04:36,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540127636] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:36,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363277947] [2021-10-05 21:04:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:04:36,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:36,594 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:36,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 21:04:36,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 21:04:36,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:36,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 21:04:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:37,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363277947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:37,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:37,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-05 21:04:37,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852673294] [2021-10-05 21:04:37,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:04:37,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:04:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:04:37,180 INFO L87 Difference]: Start difference. First operand 138 states and 366 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-10-05 21:04:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:37,682 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2021-10-05 21:04:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-05 21:04:37,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 [2021-10-05 21:04:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:37,685 INFO L225 Difference]: With dead ends: 278 [2021-10-05 21:04:37,685 INFO L226 Difference]: Without dead ends: 278 [2021-10-05 21:04:37,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:04:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-05 21:04:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 154. [2021-10-05 21:04:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.7320261437908497) internal successors, (418), 153 states have internal predecessors, (418), 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) [2021-10-05 21:04:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 418 transitions. [2021-10-05 21:04:37,694 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 418 transitions. Word has length 16 [2021-10-05 21:04:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:37,694 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 418 transitions. [2021-10-05 21:04:37,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-10-05 21:04:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 418 transitions. [2021-10-05 21:04:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:04:37,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:37,696 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:37,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:37,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:37,910 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:37,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2116712750, now seen corresponding path program 10 times [2021-10-05 21:04:37,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:37,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951255341] [2021-10-05 21:04:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:37,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:04:38,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:38,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951255341] [2021-10-05 21:04:38,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951255341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:38,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627150917] [2021-10-05 21:04:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:04:38,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:38,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:38,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 21:04:38,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:04:38,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-05 21:04:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:38,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627150917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:38,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-10-05 21:04:38,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059368483] [2021-10-05 21:04:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:04:38,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:04:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:04:38,779 INFO L87 Difference]: Start difference. First operand 154 states and 418 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-05 21:04:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:38,970 INFO L93 Difference]: Finished difference Result 172 states and 446 transitions. [2021-10-05 21:04:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 21:04:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 [2021-10-05 21:04:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:38,972 INFO L225 Difference]: With dead ends: 172 [2021-10-05 21:04:38,972 INFO L226 Difference]: Without dead ends: 160 [2021-10-05 21:04:38,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:04:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-05 21:04:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 100. [2021-10-05 21:04:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.4242424242424243) internal successors, (240), 99 states have internal predecessors, (240), 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) [2021-10-05 21:04:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 240 transitions. [2021-10-05 21:04:38,978 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 240 transitions. Word has length 16 [2021-10-05 21:04:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:38,978 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 240 transitions. [2021-10-05 21:04:38,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-05 21:04:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 240 transitions. [2021-10-05 21:04:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:04:38,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:38,980 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:39,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:39,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-05 21:04:39,196 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1092885905, now seen corresponding path program 11 times [2021-10-05 21:04:39,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:39,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306757783] [2021-10-05 21:04:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:39,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:39,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:39,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306757783] [2021-10-05 21:04:39,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306757783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:39,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441039203] [2021-10-05 21:04:39,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:04:39,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:39,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:39,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 21:04:39,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-05 21:04:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:39,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-05 21:04:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:39,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441039203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:39,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:39,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-05 21:04:39,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88637650] [2021-10-05 21:04:39,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:04:39,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:04:39,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:04:39,945 INFO L87 Difference]: Start difference. First operand 100 states and 240 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-10-05 21:04:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:40,080 INFO L93 Difference]: Finished difference Result 139 states and 331 transitions. [2021-10-05 21:04:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:04:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 [2021-10-05 21:04:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:40,082 INFO L225 Difference]: With dead ends: 139 [2021-10-05 21:04:40,082 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 21:04:40,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:04:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 21:04:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2021-10-05 21:04:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.431578947368421) internal successors, (231), 95 states have internal predecessors, (231), 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) [2021-10-05 21:04:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 231 transitions. [2021-10-05 21:04:40,086 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 231 transitions. Word has length 17 [2021-10-05 21:04:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:40,087 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 231 transitions. [2021-10-05 21:04:40,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-10-05 21:04:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 231 transitions. [2021-10-05 21:04:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:04:40,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:40,088 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:40,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:40,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:40,297 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1886415829, now seen corresponding path program 12 times [2021-10-05 21:04:40,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:40,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499576172] [2021-10-05 21:04:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:40,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:40,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:40,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499576172] [2021-10-05 21:04:40,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499576172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:40,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821885341] [2021-10-05 21:04:40,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:04:40,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:40,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:40,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:40,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 21:04:41,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-05 21:04:41,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:04:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-05 21:04:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821885341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:41,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:41,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-05 21:04:41,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446476722] [2021-10-05 21:04:41,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:04:41,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:04:41,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:04:41,447 INFO L87 Difference]: Start difference. First operand 96 states and 231 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-10-05 21:04:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:42,255 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2021-10-05 21:04:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:04:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 17 [2021-10-05 21:04:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:42,257 INFO L225 Difference]: With dead ends: 209 [2021-10-05 21:04:42,257 INFO L226 Difference]: Without dead ends: 196 [2021-10-05 21:04:42,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 828.4ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-10-05 21:04:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-05 21:04:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 100. [2021-10-05 21:04:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.4545454545454546) internal successors, (243), 99 states have internal predecessors, (243), 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) [2021-10-05 21:04:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 243 transitions. [2021-10-05 21:04:42,274 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 243 transitions. Word has length 17 [2021-10-05 21:04:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:42,275 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 243 transitions. [2021-10-05 21:04:42,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-10-05 21:04:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 243 transitions. [2021-10-05 21:04:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:04:42,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:04:42,276 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:04:42,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:42,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-05 21:04:42,494 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:04:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:04:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash -259754931, now seen corresponding path program 13 times [2021-10-05 21:04:42,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:04:42,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231871224] [2021-10-05 21:04:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:04:42,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:04:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:42,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:04:42,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231871224] [2021-10-05 21:04:42,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231871224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:42,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072589297] [2021-10-05 21:04:42,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:04:42,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:04:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:04:42,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:04:42,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 21:04:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:04:43,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-05 21:04:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:04:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:04:43,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072589297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:04:43,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:04:43,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-05 21:04:43,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136379425] [2021-10-05 21:04:43,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:04:43,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:04:43,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:04:43,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:04:43,650 INFO L87 Difference]: Start difference. First operand 100 states and 243 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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) [2021-10-05 21:04:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:04:43,920 INFO L93 Difference]: Finished difference Result 127 states and 311 transitions. [2021-10-05 21:04:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 21:04:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 [2021-10-05 21:04:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:04:43,930 INFO L225 Difference]: With dead ends: 127 [2021-10-05 21:04:43,930 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 21:04:43,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-10-05 21:04:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 21:04:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 21:04:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-05 21:04:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 21:04:43,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-05 21:04:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:04:43,934 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 21:04:43,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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) [2021-10-05 21:04:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 21:04:43,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 21:04:43,937 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 21:04:43,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 21:04:43,938 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 21:04:43,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-05 21:04:44,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 21:04:44,145 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 21:04:44,145 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 21:04:44,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 09:04:44 BasicIcfg [2021-10-05 21:04:44,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 21:04:44,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 21:04:44,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 21:04:44,148 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 21:04:44,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:04:22" (3/4) ... [2021-10-05 21:04:44,151 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 21:04:44,157 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 21:04:44,157 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 21:04:44,161 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-05 21:04:44,162 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 21:04:44,162 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 21:04:44,162 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 21:04:44,193 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 21:04:44,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 21:04:44,195 INFO L168 Benchmark]: Toolchain (without parser) took 23122.93 ms. Allocated memory was 48.2 MB in the beginning and 195.0 MB in the end (delta: 146.8 MB). Free memory was 24.5 MB in the beginning and 131.3 MB in the end (delta: -106.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 16.1 GB. [2021-10-05 21:04:44,195 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 36.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:04:44,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.45 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.2 MB in the beginning and 37.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-10-05 21:04:44,196 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.50 ms. Allocated memory is still 60.8 MB. Free memory was 37.7 MB in the beginning and 36.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:04:44,196 INFO L168 Benchmark]: Boogie Preprocessor took 60.47 ms. Allocated memory is still 60.8 MB. Free memory was 36.2 MB in the beginning and 35.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-05 21:04:44,197 INFO L168 Benchmark]: RCFGBuilder took 598.44 ms. Allocated memory is still 60.8 MB. Free memory was 35.0 MB in the beginning and 37.8 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:04:44,198 INFO L168 Benchmark]: TraceAbstraction took 21971.49 ms. Allocated memory was 60.8 MB in the beginning and 195.0 MB in the end (delta: 134.2 MB). Free memory was 37.3 MB in the beginning and 134.1 MB in the end (delta: -96.8 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. [2021-10-05 21:04:44,198 INFO L168 Benchmark]: Witness Printer took 45.44 ms. Allocated memory is still 195.0 MB. Free memory was 134.1 MB in the beginning and 131.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:04:44,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 36.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 384.45 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.2 MB in the beginning and 37.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.50 ms. Allocated memory is still 60.8 MB. Free memory was 37.7 MB in the beginning and 36.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.47 ms. Allocated memory is still 60.8 MB. Free memory was 36.2 MB in the beginning and 35.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 598.44 ms. Allocated memory is still 60.8 MB. Free memory was 35.0 MB in the beginning and 37.8 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21971.49 ms. Allocated memory was 60.8 MB in the beginning and 195.0 MB in the end (delta: 134.2 MB). Free memory was 37.3 MB in the beginning and 134.1 MB in the end (delta: -96.8 MB). Peak memory consumption was 36.7 MB. Max. memory is 16.1 GB. * Witness Printer took 45.44 ms. Allocated memory is still 195.0 MB. Free memory was 134.1 MB in the beginning and 131.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3536.4ms, 82 PlacesBefore, 21 PlacesAfterwards, 86 TransitionsBefore, 16 TransitionsAfterwards, 1088 CoEnabledTransitionPairs, 5 FixpointIterations, 34 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 9 ChoiceCompositions, 81 TotalNumberOfCompositions, 1023 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1023, positive: 1023, positive conditional: 0, positive unconditional: 1023, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 768, positive: 768, positive conditional: 0, positive unconditional: 768, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 768, positive: 757, positive conditional: 0, positive unconditional: 757, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 87, positive: 87, positive conditional: 0, positive unconditional: 87, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1023, positive: 255, positive conditional: 0, positive unconditional: 255, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 768, unknown conditional: 0, unknown unconditional: 768] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - 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 - PositiveResult [Line: 97]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 104 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 21843.6ms, OverallIterations: 15, TraceHistogramMax: 4, EmptinessCheckTime: 24.5ms, AutomataDifference: 4064.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3604.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 268 SDtfs, 982 SDslu, 1369 SDs, 0 SdLazy, 1071 SolverSat, 299 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1294.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3900.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=11, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 180.5ms AutomataMinimizationTime, 15 MinimizatonAttempts, 624 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 146.7ms SsaConstructionTime, 1109.3ms SatisfiabilityAnalysisTime, 7991.1ms InterpolantComputationTime, 425 NumberOfCodeBlocks, 425 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 397 ConstructedInterpolants, 0 QuantifiedInterpolants, 4546 SizeOfPredicates, 55 NumberOfNonLiveVariables, 1311 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 20/205 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 21:04:44,220 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...