./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test/easy1.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/test/easy1.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 ecdd6379fd7e8765bf476fee1e7dbf04fccd4a7c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 11:54:22,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 11:54:22,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 11:54:22,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 11:54:22,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 11:54:22,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 11:54:22,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 11:54:22,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 11:54:22,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 11:54:22,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 11:54:22,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 11:54:22,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 11:54:22,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 11:54:22,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 11:54:22,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 11:54:22,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 11:54:22,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 11:54:22,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 11:54:22,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 11:54:22,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 11:54:22,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 11:54:22,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 11:54:22,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 11:54:22,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 11:54:22,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 11:54:22,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 11:54:22,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 11:54:22,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 11:54:22,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 11:54:22,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 11:54:22,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 11:54:22,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 11:54:22,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 11:54:22,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 11:54:22,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 11:54:22,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 11:54:22,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 11:54:22,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 11:54:22,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 11:54:22,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 11:54:22,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 11:54:22,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 11:54:22,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 11:54:22,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 11:54:22,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 11:54:22,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 11:54:22,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 11:54:22,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 11:54:22,612 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 11:54:22,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 11:54:22,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 11:54:22,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 11:54:22,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 11:54:22,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 11:54:22,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 11:54:22,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 11:54:22,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 11:54:22,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 11:54:22,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 11:54:22,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 11:54:22,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 11:54:22,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 11:54:22,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 11:54:22,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 11:54:22,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 11:54:22,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 11:54:22,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 11:54:22,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 11:54:22,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 11:54:22,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 11:54:22,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 11:54:22,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 11:54:22,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecdd6379fd7e8765bf476fee1e7dbf04fccd4a7c [2021-10-03 11:54:23,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 11:54:23,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 11:54:23,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 11:54:23,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 11:54:23,127 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 11:54:23,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test/easy1.wvr.c [2021-10-03 11:54:23,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7665e99ea/537e82e3476d469c92645f69b8e9e31e/FLAGe8dd8147e [2021-10-03 11:54:23,915 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 11:54:23,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy1.wvr.c [2021-10-03 11:54:23,917 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 11:54:23,917 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 11:54:23,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7665e99ea/537e82e3476d469c92645f69b8e9e31e/FLAGe8dd8147e [2021-10-03 11:54:24,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7665e99ea/537e82e3476d469c92645f69b8e9e31e [2021-10-03 11:54:24,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 11:54:24,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 11:54:24,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 11:54:24,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 11:54:24,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 11:54:24,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f51d27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24, skipping insertion in model container [2021-10-03 11:54:24,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 11:54:24,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 11:54:24,459 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 11:54:24,531 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/test/easy1.wvr.c[835,848] [2021-10-03 11:54:24,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 11:54:24,553 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 11:54:24,565 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 11:54:24,574 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/test/easy1.wvr.c[835,848] [2021-10-03 11:54:24,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 11:54:24,591 INFO L208 MainTranslator]: Completed translation [2021-10-03 11:54:24,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24 WrapperNode [2021-10-03 11:54:24,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 11:54:24,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 11:54:24,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 11:54:24,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 11:54:24,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 11:54:24,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 11:54:24,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 11:54:24,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 11:54:24,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 11:54:24,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 11:54:24,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 11:54:24,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 11:54:24,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (1/1) ... [2021-10-03 11:54:24,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 11:54:24,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:24,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-03 11:54:24,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-03 11:54:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 11:54:24,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 11:54:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 11:54:24,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 11:54:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 11:54:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 11:54:24,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 11:54:24,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 11:54:24,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 11:54:24,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 11:54:24,789 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 11:54:25,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 11:54:25,130 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-03 11:54:25,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:54:25 BoogieIcfgContainer [2021-10-03 11:54:25,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 11:54:25,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 11:54:25,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 11:54:25,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 11:54:25,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 11:54:24" (1/3) ... [2021-10-03 11:54:25,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79771dc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 11:54:25, skipping insertion in model container [2021-10-03 11:54:25,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:54:24" (2/3) ... [2021-10-03 11:54:25,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79771dc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 11:54:25, skipping insertion in model container [2021-10-03 11:54:25,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:54:25" (3/3) ... [2021-10-03 11:54:25,160 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.c [2021-10-03 11:54:25,169 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 11:54:25,170 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 11:54:25,170 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 11:54:25,170 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 11:54:25,211 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,211 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,212 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,212 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,213 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,213 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,214 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,215 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,215 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,215 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,216 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,216 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,220 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,221 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,221 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,227 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:54:25,240 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-03 11:54:25,337 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 11:54:25,350 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-03 11:54:25,351 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-03 11:54:25,393 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 11:54:25,409 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 67 transitions, 150 flow [2021-10-03 11:54:25,417 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 67 transitions, 150 flow [2021-10-03 11:54:25,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 67 transitions, 150 flow [2021-10-03 11:54:25,489 INFO L129 PetriNetUnfolder]: 6/65 cut-off events. [2021-10-03 11:54:25,489 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-03 11:54:25,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 6/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-10-03 11:54:25,495 INFO L116 LiptonReduction]: Number of co-enabled transitions 308 [2021-10-03 11:54:27,419 INFO L131 LiptonReduction]: Checked pairs total: 341 [2021-10-03 11:54:27,419 INFO L133 LiptonReduction]: Total number of compositions: 62 [2021-10-03 11:54:27,429 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-03 11:54:27,441 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) [2021-10-03 11:54:27,444 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) [2021-10-03 11:54:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-03 11:54:27,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:27,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:27,452 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1746083970, now seen corresponding path program 1 times [2021-10-03 11:54:27,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:27,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577168032] [2021-10-03 11:54:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:27,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:27,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:27,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577168032] [2021-10-03 11:54:27,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577168032] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:27,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:27,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-03 11:54:27,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640319585] [2021-10-03 11:54:27,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 11:54:27,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 11:54:27,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 11:54:27,746 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, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:27,778 INFO L93 Difference]: Finished difference Result 37 states and 77 transitions. [2021-10-03 11:54:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 11:54:27,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-03 11:54:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:27,791 INFO L225 Difference]: With dead ends: 37 [2021-10-03 11:54:27,792 INFO L226 Difference]: Without dead ends: 32 [2021-10-03 11:54:27,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 11:54:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-03 11:54:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-03 11:54:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2021-10-03 11:54:27,834 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 11 [2021-10-03 11:54:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:27,835 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2021-10-03 11:54:27,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2021-10-03 11:54:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-03 11:54:27,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:27,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:27,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 11:54:27,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash -888004464, now seen corresponding path program 1 times [2021-10-03 11:54:27,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:27,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642806896] [2021-10-03 11:54:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:27,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:27,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:27,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642806896] [2021-10-03 11:54:27,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642806896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:27,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921447723] [2021-10-03 11:54:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:27,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:27,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:27,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:54:27,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-03 11:54:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-03 11:54:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:28,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921447723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:28,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:28,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-10-03 11:54:28,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625527232] [2021-10-03 11:54:28,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 11:54:28,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 11:54:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-03 11:54:28,141 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:28,181 INFO L93 Difference]: Finished difference Result 46 states and 91 transitions. [2021-10-03 11:54:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:54:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-03 11:54:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:28,184 INFO L225 Difference]: With dead ends: 46 [2021-10-03 11:54:28,184 INFO L226 Difference]: Without dead ends: 46 [2021-10-03 11:54:28,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-03 11:54:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-03 11:54:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2021-10-03 11:54:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 72 transitions. [2021-10-03 11:54:28,194 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 72 transitions. Word has length 12 [2021-10-03 11:54:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:28,195 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 72 transitions. [2021-10-03 11:54:28,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 72 transitions. [2021-10-03 11:54:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-03 11:54:28,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:28,197 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:28,237 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 [2021-10-03 11:54:28,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:28,413 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2076676924, now seen corresponding path program 1 times [2021-10-03 11:54:28,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:28,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700863439] [2021-10-03 11:54:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:28,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:28,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:28,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700863439] [2021-10-03 11:54:28,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700863439] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:28,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:28,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 11:54:28,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394024151] [2021-10-03 11:54:28,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:54:28,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:28,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:54:28,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 11:54:28,561 INFO L87 Difference]: Start difference. First operand 32 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:28,589 INFO L93 Difference]: Finished difference Result 38 states and 75 transitions. [2021-10-03 11:54:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:54:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-03 11:54:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:28,593 INFO L225 Difference]: With dead ends: 38 [2021-10-03 11:54:28,594 INFO L226 Difference]: Without dead ends: 30 [2021-10-03 11:54:28,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 11:54:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-03 11:54:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-03 11:54:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 63 transitions. [2021-10-03 11:54:28,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 63 transitions. Word has length 12 [2021-10-03 11:54:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:28,605 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 63 transitions. [2021-10-03 11:54:28,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 63 transitions. [2021-10-03 11:54:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-03 11:54:28,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:28,608 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:28,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 11:54:28,610 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:28,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1274481726, now seen corresponding path program 2 times [2021-10-03 11:54:28,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:28,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791965000] [2021-10-03 11:54:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:28,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:28,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:28,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791965000] [2021-10-03 11:54:28,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791965000] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:28,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:54:28,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 11:54:28,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559522690] [2021-10-03 11:54:28,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:54:28,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:54:28,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 11:54:28,735 INFO L87 Difference]: Start difference. First operand 30 states and 63 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:28,762 INFO L93 Difference]: Finished difference Result 34 states and 73 transitions. [2021-10-03 11:54:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:54:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-03 11:54:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:28,764 INFO L225 Difference]: With dead ends: 34 [2021-10-03 11:54:28,765 INFO L226 Difference]: Without dead ends: 34 [2021-10-03 11:54:28,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-03 11:54:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-03 11:54:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-03 11:54:28,770 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) [2021-10-03 11:54:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2021-10-03 11:54:28,771 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 12 [2021-10-03 11:54:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:28,772 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2021-10-03 11:54:28,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2021-10-03 11:54:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:28,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:28,774 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:28,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-03 11:54:28,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:28,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1387629462, now seen corresponding path program 1 times [2021-10-03 11:54:28,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:28,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285898156] [2021-10-03 11:54:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:28,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:28,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:28,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285898156] [2021-10-03 11:54:28,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285898156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:28,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210045543] [2021-10-03 11:54:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:28,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:28,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:54:28,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-03 11:54:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-03 11:54:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:29,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210045543] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:29,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:54:29,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-10-03 11:54:29,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944398687] [2021-10-03 11:54:29,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 11:54:29,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 11:54:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:54:29,122 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:29,153 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2021-10-03 11:54:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 11:54:29,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:29,155 INFO L225 Difference]: With dead ends: 43 [2021-10-03 11:54:29,155 INFO L226 Difference]: Without dead ends: 28 [2021-10-03 11:54:29,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:54:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-03 11:54:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-03 11:54:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 56 transitions. [2021-10-03 11:54:29,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 56 transitions. Word has length 13 [2021-10-03 11:54:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:29,162 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 56 transitions. [2021-10-03 11:54:29,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 56 transitions. [2021-10-03 11:54:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:29,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:29,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:29,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-03 11:54:29,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:29,390 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash -443820816, now seen corresponding path program 2 times [2021-10-03 11:54:29,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:29,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444694331] [2021-10-03 11:54:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:29,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:29,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:29,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444694331] [2021-10-03 11:54:29,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444694331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:29,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368677174] [2021-10-03 11:54:29,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:54:29,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:29,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:29,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:54:29,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-03 11:54:29,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:54:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-03 11:54:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:29,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368677174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:29,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:29,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 8 [2021-10-03 11:54:29,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742144935] [2021-10-03 11:54:29,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 11:54:29,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:29,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 11:54:29,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:29,706 INFO L87 Difference]: Start difference. First operand 28 states and 56 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:29,818 INFO L93 Difference]: Finished difference Result 63 states and 124 transitions. [2021-10-03 11:54:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:29,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:29,820 INFO L225 Difference]: With dead ends: 63 [2021-10-03 11:54:29,820 INFO L226 Difference]: Without dead ends: 46 [2021-10-03 11:54:29,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:54:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-03 11:54:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-10-03 11:54:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 75 transitions. [2021-10-03 11:54:29,827 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 75 transitions. Word has length 13 [2021-10-03 11:54:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:29,828 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 75 transitions. [2021-10-03 11:54:29,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 75 transitions. [2021-10-03 11:54:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 11:54:29,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:29,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:29,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-03 11:54:30,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:30,044 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:30,045 INFO L82 PathProgramCache]: Analyzing trace with hash -685444920, now seen corresponding path program 3 times [2021-10-03 11:54:30,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:30,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509118268] [2021-10-03 11:54:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:30,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:30,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:30,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509118268] [2021-10-03 11:54:30,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509118268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:30,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703546206] [2021-10-03 11:54:30,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:54:30,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:30,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:54:30,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-03 11:54:30,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 11:54:30,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:30,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-03 11:54:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:30,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703546206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:30,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:30,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 8 [2021-10-03 11:54:30,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751427960] [2021-10-03 11:54:30,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 11:54:30,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 11:54:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:30,386 INFO L87 Difference]: Start difference. First operand 34 states and 75 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:30,475 INFO L93 Difference]: Finished difference Result 55 states and 123 transitions. [2021-10-03 11:54:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-03 11:54:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:30,477 INFO L225 Difference]: With dead ends: 55 [2021-10-03 11:54:30,478 INFO L226 Difference]: Without dead ends: 50 [2021-10-03 11:54:30,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:54:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-03 11:54:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-10-03 11:54:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2021-10-03 11:54:30,485 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 13 [2021-10-03 11:54:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:30,485 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2021-10-03 11:54:30,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2021-10-03 11:54:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:30,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:30,487 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:30,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-03 11:54:30,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:30,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash 154708690, now seen corresponding path program 4 times [2021-10-03 11:54:30,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:30,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164826243] [2021-10-03 11:54:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:30,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:30,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:30,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164826243] [2021-10-03 11:54:30,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164826243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:30,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272379319] [2021-10-03 11:54:30,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:54:30,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:30,796 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) [2021-10-03 11:54:30,813 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 [2021-10-03 11:54:30,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:54:30,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:30,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-03 11:54:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:30,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272379319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:30,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:30,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-03 11:54:30,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811095054] [2021-10-03 11:54:30,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 11:54:30,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:30,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 11:54:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:30,974 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:31,039 INFO L93 Difference]: Finished difference Result 44 states and 94 transitions. [2021-10-03 11:54:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-03 11:54:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:31,040 INFO L225 Difference]: With dead ends: 44 [2021-10-03 11:54:31,041 INFO L226 Difference]: Without dead ends: 40 [2021-10-03 11:54:31,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:54:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-03 11:54:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-10-03 11:54:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2021-10-03 11:54:31,046 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 14 [2021-10-03 11:54:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:31,047 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2021-10-03 11:54:31,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2021-10-03 11:54:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:31,049 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:31,049 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:31,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-03 11:54:31,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:31,264 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash 395421528, now seen corresponding path program 5 times [2021-10-03 11:54:31,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:31,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105481457] [2021-10-03 11:54:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:31,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:31,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:31,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105481457] [2021-10-03 11:54:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105481457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:31,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775669377] [2021-10-03 11:54:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 11:54:31,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:31,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:31,315 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) [2021-10-03 11:54:31,329 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 [2021-10-03 11:54:31,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:54:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-03 11:54:31,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:31,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775669377] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:31,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:31,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-03 11:54:31,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33695209] [2021-10-03 11:54:31,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 11:54:31,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 11:54:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:31,505 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:31,555 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2021-10-03 11:54:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:31,556 INFO L225 Difference]: With dead ends: 48 [2021-10-03 11:54:31,557 INFO L226 Difference]: Without dead ends: 46 [2021-10-03 11:54:31,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:54:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-03 11:54:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-10-03 11:54:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 72 transitions. [2021-10-03 11:54:31,562 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 72 transitions. Word has length 14 [2021-10-03 11:54:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:31,563 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 72 transitions. [2021-10-03 11:54:31,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 72 transitions. [2021-10-03 11:54:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:31,564 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:31,564 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:31,591 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 [2021-10-03 11:54:31,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:31,778 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1453002320, now seen corresponding path program 6 times [2021-10-03 11:54:31,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:31,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561173927] [2021-10-03 11:54:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:31,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:31,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:31,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561173927] [2021-10-03 11:54:31,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561173927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:31,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976595713] [2021-10-03 11:54:31,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 11:54:31,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:31,839 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) [2021-10-03 11:54:31,868 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 [2021-10-03 11:54:31,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-03 11:54:31,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:54:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-03 11:54:31,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:32,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976595713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:32,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:54:32,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-03 11:54:32,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501059808] [2021-10-03 11:54:32,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 11:54:32,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:32,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 11:54:32,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:54:32,038 INFO L87 Difference]: Start difference. First operand 34 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2021-10-03 11:54:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:32,122 INFO L93 Difference]: Finished difference Result 48 states and 105 transitions. [2021-10-03 11:54:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:54:32,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 14 [2021-10-03 11:54:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:32,124 INFO L225 Difference]: With dead ends: 48 [2021-10-03 11:54:32,124 INFO L226 Difference]: Without dead ends: 48 [2021-10-03 11:54:32,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:54:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-03 11:54:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-10-03 11:54:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 86 transitions. [2021-10-03 11:54:32,142 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 86 transitions. Word has length 14 [2021-10-03 11:54:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:32,142 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 86 transitions. [2021-10-03 11:54:32,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2021-10-03 11:54:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 86 transitions. [2021-10-03 11:54:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-03 11:54:32,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:54:32,145 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:54:32,190 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 [2021-10-03 11:54:32,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-03 11:54:32,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:54:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:54:32,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1269162208, now seen corresponding path program 7 times [2021-10-03 11:54:32,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:54:32,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850545978] [2021-10-03 11:54:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:54:32,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:54:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:54:32,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:54:32,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850545978] [2021-10-03 11:54:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850545978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:54:32,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184859813] [2021-10-03 11:54:32,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 11:54:32,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:54:32,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:54:32,458 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) [2021-10-03 11:54:32,461 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 [2021-10-03 11:54:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:54:32,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-03 11:54:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:54:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 11:54:32,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184859813] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:54:32,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:54:32,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-10-03 11:54:32,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396146039] [2021-10-03 11:54:32,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 11:54:32,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:54:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 11:54:32,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:54:32,676 INFO L87 Difference]: Start difference. First operand 38 states and 86 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:54:32,695 INFO L93 Difference]: Finished difference Result 41 states and 93 transitions. [2021-10-03 11:54:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 11:54:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-03 11:54:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:54:32,696 INFO L225 Difference]: With dead ends: 41 [2021-10-03 11:54:32,696 INFO L226 Difference]: Without dead ends: 0 [2021-10-03 11:54:32,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:54:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-03 11:54:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-03 11:54:32,698 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) [2021-10-03 11:54:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-03 11:54:32,698 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-03 11:54:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:54:32,700 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-03 11:54:32,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:54:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-03 11:54:32,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-03 11:54:32,706 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 11:54:32,707 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 11:54:32,710 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 11:54:32,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-03 11:54:32,924 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,SelfDestructingSolverStorable10 [2021-10-03 11:54:32,930 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 11:54:32,931 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 11:54:32,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 11:54:32 BasicIcfg [2021-10-03 11:54:32,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 11:54:32,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 11:54:32,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 11:54:32,937 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 11:54:32,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:54:25" (3/4) ... [2021-10-03 11:54:32,942 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-03 11:54:32,950 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-03 11:54:32,950 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-03 11:54:32,957 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-03 11:54:32,957 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 11:54:32,957 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 11:54:33,000 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 11:54:33,001 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 11:54:33,003 INFO L168 Benchmark]: Toolchain (without parser) took 8726.18 ms. Allocated memory was 50.3 MB in the beginning and 86.0 MB in the end (delta: 35.7 MB). Free memory was 26.5 MB in the beginning and 26.0 MB in the end (delta: 458.4 kB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:33,003 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 50.3 MB. Free memory was 29.0 MB in the beginning and 29.0 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 11:54:33,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.46 ms. Allocated memory was 50.3 MB in the beginning and 71.3 MB in the end (delta: 21.0 MB). Free memory was 26.2 MB in the beginning and 48.9 MB in the end (delta: -22.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:33,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.90 ms. Allocated memory is still 71.3 MB. Free memory was 48.9 MB in the beginning and 47.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:33,005 INFO L168 Benchmark]: Boogie Preprocessor took 28.05 ms. Allocated memory is still 71.3 MB. Free memory was 47.4 MB in the beginning and 46.4 MB in the end (delta: 947.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 11:54:33,005 INFO L168 Benchmark]: RCFGBuilder took 468.16 ms. Allocated memory is still 71.3 MB. Free memory was 46.3 MB in the beginning and 52.8 MB in the end (delta: -6.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:33,006 INFO L168 Benchmark]: TraceAbstraction took 7795.98 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 52.5 MB in the beginning and 28.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:33,006 INFO L168 Benchmark]: Witness Printer took 64.38 ms. Allocated memory is still 86.0 MB. Free memory was 28.7 MB in the beginning and 26.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 11:54:33,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 50.3 MB. Free memory was 29.0 MB in the beginning and 29.0 MB in the end (delta: 39.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.46 ms. Allocated memory was 50.3 MB in the beginning and 71.3 MB in the end (delta: 21.0 MB). Free memory was 26.2 MB in the beginning and 48.9 MB in the end (delta: -22.7 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.90 ms. Allocated memory is still 71.3 MB. Free memory was 48.9 MB in the beginning and 47.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.05 ms. Allocated memory is still 71.3 MB. Free memory was 47.4 MB in the beginning and 46.4 MB in the end (delta: 947.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 468.16 ms. Allocated memory is still 71.3 MB. Free memory was 46.3 MB in the beginning and 52.8 MB in the end (delta: -6.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7795.98 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 52.5 MB in the beginning and 28.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. * Witness Printer took 64.38 ms. Allocated memory is still 86.0 MB. Free memory was 28.7 MB in the beginning and 26.0 MB in the end (delta: 2.6 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: 2002.8ms, 68 PlacesBefore, 21 PlacesAfterwards, 67 TransitionsBefore, 16 TransitionsAfterwards, 308 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 13 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 62 TotalNumberOfCompositions, 341 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 341, positive: 341, positive conditional: 0, positive unconditional: 341, 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: 222, positive: 222, positive conditional: 0, positive unconditional: 222, 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: 222, positive: 222, positive conditional: 0, positive unconditional: 222, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 341, positive: 119, positive conditional: 0, positive unconditional: 119, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 222, unknown conditional: 0, unknown unconditional: 222] , 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: 45]: 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, 76 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 7594.7ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 20.5ms, AutomataDifference: 658.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2090.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 164 SDtfs, 215 SDslu, 305 SDs, 0 SdLazy, 344 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 264.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 454.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=10, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 92.3ms AutomataMinimizationTime, 11 MinimizatonAttempts, 72 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 70.4ms SsaConstructionTime, 472.3ms SatisfiabilityAnalysisTime, 1694.7ms InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 1060 SizeOfPredicates, 15 NumberOfNonLiveVariables, 585 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 24/48 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! [2021-10-03 11:54:33,052 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...