./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 96f16385 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ac9fb7ba9629726b891659a82add33d1f818961 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-96f1638 [2020-12-02 12:10:19,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 12:10:19,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 12:10:19,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 12:10:19,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 12:10:19,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 12:10:19,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 12:10:19,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 12:10:19,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 12:10:19,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 12:10:19,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 12:10:19,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 12:10:19,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 12:10:19,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 12:10:19,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 12:10:19,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 12:10:19,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 12:10:19,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 12:10:19,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 12:10:19,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 12:10:19,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 12:10:19,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 12:10:19,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 12:10:19,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 12:10:19,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 12:10:19,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 12:10:19,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 12:10:19,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 12:10:19,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 12:10:19,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 12:10:19,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 12:10:19,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 12:10:19,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 12:10:19,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 12:10:19,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 12:10:19,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 12:10:19,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 12:10:19,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 12:10:19,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 12:10:19,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 12:10:19,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 12:10:19,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 12:10:19,343 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 12:10:19,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 12:10:19,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 12:10:19,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 12:10:19,346 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 12:10:19,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 12:10:19,347 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 12:10:19,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 12:10:19,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 12:10:19,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 12:10:19,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 12:10:19,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 12:10:19,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 12:10:19,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 12:10:19,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 12:10:19,350 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 12:10:19,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 12:10:19,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 12:10:19,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 12:10:19,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 12:10:19,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 12:10:19,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 12:10:19,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 12:10:19,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 12:10:19,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 12:10:19,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 12:10:19,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 12:10:19,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 12:10:19,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 12:10:19,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ac9fb7ba9629726b891659a82add33d1f818961 [2020-12-02 12:10:19,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 12:10:19,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 12:10:19,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 12:10:19,815 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 12:10:19,816 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 12:10:19,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i [2020-12-02 12:10:19,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a01654f/37c33c57c2424d4f8c305894fef470cc/FLAG7a7c69add [2020-12-02 12:10:20,806 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 12:10:20,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i [2020-12-02 12:10:20,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a01654f/37c33c57c2424d4f8c305894fef470cc/FLAG7a7c69add [2020-12-02 12:10:20,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a01654f/37c33c57c2424d4f8c305894fef470cc [2020-12-02 12:10:20,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 12:10:20,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 12:10:20,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 12:10:20,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 12:10:21,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 12:10:21,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:10:20" (1/1) ... [2020-12-02 12:10:21,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d561d99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21, skipping insertion in model container [2020-12-02 12:10:21,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:10:20" (1/1) ... [2020-12-02 12:10:21,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 12:10:21,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-02 12:10:21,286 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i[950,963] [2020-12-02 12:10:21,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-02 12:10:21,641 INFO L203 MainTranslator]: Completed pre-run [2020-12-02 12:10:21,661 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i[950,963] [2020-12-02 12:10:21,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-02 12:10:21,806 INFO L208 MainTranslator]: Completed translation [2020-12-02 12:10:21,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21 WrapperNode [2020-12-02 12:10:21,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 12:10:21,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 12:10:21,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 12:10:21,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 12:10:21,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 12:10:21,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 12:10:21,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 12:10:21,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 12:10:21,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... [2020-12-02 12:10:21,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 12:10:21,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 12:10:21,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 12:10:21,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 12:10:21,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 12:10:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-02 12:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-02 12:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 12:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 12:10:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-02 12:10:22,016 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-02 12:10:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-02 12:10:22,017 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-02 12:10:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-02 12:10:22,017 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-02 12:10:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 12:10:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-02 12:10:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 12:10:22,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 12:10:22,020 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-02 12:10:22,573 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 12:10:22,573 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-02 12:10:22,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:10:22 BoogieIcfgContainer [2020-12-02 12:10:22,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 12:10:22,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 12:10:22,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 12:10:22,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 12:10:22,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:10:20" (1/3) ... [2020-12-02 12:10:22,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ac8fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:10:22, skipping insertion in model container [2020-12-02 12:10:22,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:21" (2/3) ... [2020-12-02 12:10:22,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ac8fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:10:22, skipping insertion in model container [2020-12-02 12:10:22,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:10:22" (3/3) ... [2020-12-02 12:10:22,585 INFO L111 eAbstractionObserver]: Analyzing ICFG safe021_tso.oepc.i [2020-12-02 12:10:22,602 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-02 12:10:22,602 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 12:10:22,606 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 12:10:22,607 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-02 12:10:22,642 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,643 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,643 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,643 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,644 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,644 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,644 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,644 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,645 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,645 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,646 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,646 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,646 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,647 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,647 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,647 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,647 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,648 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,648 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,648 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,649 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,649 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,649 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,649 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,650 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,650 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,651 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,651 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,651 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,651 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,652 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,652 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,652 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,653 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,653 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,653 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,656 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,656 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,657 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,657 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,662 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,663 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,663 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,664 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,666 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,667 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,667 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,667 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:22,670 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-02 12:10:22,683 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-02 12:10:22,710 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 12:10:22,710 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 12:10:22,711 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 12:10:22,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 12:10:22,711 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 12:10:22,711 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 12:10:22,711 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 12:10:22,712 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 12:10:22,726 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-02 12:10:22,729 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-02 12:10:22,733 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-02 12:10:22,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2020-12-02 12:10:22,791 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2020-12-02 12:10:22,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-02 12:10:22,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2020-12-02 12:10:22,799 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2020-12-02 12:10:26,282 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-02 12:10:26,386 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-02 12:10:26,625 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-02 12:10:26,723 INFO L131 LiptonReduction]: Checked pairs total: 2563 [2020-12-02 12:10:26,724 INFO L133 LiptonReduction]: Total number of compositions: 61 [2020-12-02 12:10:26,730 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-12-02 12:10:26,764 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-12-02 12:10:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-12-02 12:10:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-02 12:10:26,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:26,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:26,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:26,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1485857802, now seen corresponding path program 1 times [2020-12-02 12:10:26,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:26,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696946282] [2020-12-02 12:10:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:27,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696946282] [2020-12-02 12:10:27,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:27,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 12:10:27,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703733950] [2020-12-02 12:10:27,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 12:10:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 12:10:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 12:10:27,120 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-12-02 12:10:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:27,155 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-12-02 12:10:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 12:10:27,157 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-02 12:10:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:27,175 INFO L225 Difference]: With dead ends: 362 [2020-12-02 12:10:27,176 INFO L226 Difference]: Without dead ends: 298 [2020-12-02 12:10:27,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 12:10:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-02 12:10:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-12-02 12:10:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-12-02 12:10:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-12-02 12:10:27,265 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-12-02 12:10:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:27,266 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-12-02 12:10:27,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 12:10:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-12-02 12:10:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-02 12:10:27,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:27,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:27,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 12:10:27,270 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1183024898, now seen corresponding path program 1 times [2020-12-02 12:10:27,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:27,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261850235] [2020-12-02 12:10:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:27,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261850235] [2020-12-02 12:10:27,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:27,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 12:10:27,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604721489] [2020-12-02 12:10:27,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 12:10:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:27,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 12:10:27,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:27,430 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 4 states. [2020-12-02 12:10:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:27,503 INFO L93 Difference]: Finished difference Result 346 states and 956 transitions. [2020-12-02 12:10:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 12:10:27,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-02 12:10:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:27,512 INFO L225 Difference]: With dead ends: 346 [2020-12-02 12:10:27,512 INFO L226 Difference]: Without dead ends: 282 [2020-12-02 12:10:27,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-02 12:10:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-12-02 12:10:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-02 12:10:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 804 transitions. [2020-12-02 12:10:27,583 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 804 transitions. Word has length 9 [2020-12-02 12:10:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:27,584 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 804 transitions. [2020-12-02 12:10:27,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 12:10:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 804 transitions. [2020-12-02 12:10:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 12:10:27,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:27,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:27,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 12:10:27,592 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:27,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1694304319, now seen corresponding path program 1 times [2020-12-02 12:10:27,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:27,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048404206] [2020-12-02 12:10:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:27,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048404206] [2020-12-02 12:10:27,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:27,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 12:10:27,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547484242] [2020-12-02 12:10:27,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 12:10:27,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 12:10:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:27,723 INFO L87 Difference]: Start difference. First operand 282 states and 804 transitions. Second operand 5 states. [2020-12-02 12:10:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:27,824 INFO L93 Difference]: Finished difference Result 418 states and 1114 transitions. [2020-12-02 12:10:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 12:10:27,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-02 12:10:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:27,829 INFO L225 Difference]: With dead ends: 418 [2020-12-02 12:10:27,829 INFO L226 Difference]: Without dead ends: 314 [2020-12-02 12:10:27,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-02 12:10:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-02 12:10:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 278. [2020-12-02 12:10:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-02 12:10:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 760 transitions. [2020-12-02 12:10:27,865 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 760 transitions. Word has length 10 [2020-12-02 12:10:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:27,866 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 760 transitions. [2020-12-02 12:10:27,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 12:10:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 760 transitions. [2020-12-02 12:10:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 12:10:27,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:27,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:27,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-02 12:10:27,869 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash 983803802, now seen corresponding path program 1 times [2020-12-02 12:10:27,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:27,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905572594] [2020-12-02 12:10:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:27,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905572594] [2020-12-02 12:10:27,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:27,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 12:10:27,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148060766] [2020-12-02 12:10:27,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 12:10:27,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 12:10:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:27,958 INFO L87 Difference]: Start difference. First operand 278 states and 760 transitions. Second operand 5 states. [2020-12-02 12:10:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:28,036 INFO L93 Difference]: Finished difference Result 340 states and 898 transitions. [2020-12-02 12:10:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 12:10:28,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-02 12:10:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:28,043 INFO L225 Difference]: With dead ends: 340 [2020-12-02 12:10:28,043 INFO L226 Difference]: Without dead ends: 178 [2020-12-02 12:10:28,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-02 12:10:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-02 12:10:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-12-02 12:10:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-02 12:10:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 444 transitions. [2020-12-02 12:10:28,057 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 444 transitions. Word has length 11 [2020-12-02 12:10:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:28,058 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 444 transitions. [2020-12-02 12:10:28,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 12:10:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 444 transitions. [2020-12-02 12:10:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 12:10:28,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:28,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:28,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-02 12:10:28,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1699197876, now seen corresponding path program 1 times [2020-12-02 12:10:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:28,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798500469] [2020-12-02 12:10:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:28,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798500469] [2020-12-02 12:10:28,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:28,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 12:10:28,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508034649] [2020-12-02 12:10:28,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 12:10:28,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:28,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 12:10:28,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:28,165 INFO L87 Difference]: Start difference. First operand 178 states and 444 transitions. Second operand 4 states. [2020-12-02 12:10:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:28,218 INFO L93 Difference]: Finished difference Result 194 states and 437 transitions. [2020-12-02 12:10:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 12:10:28,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-02 12:10:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:28,221 INFO L225 Difference]: With dead ends: 194 [2020-12-02 12:10:28,221 INFO L226 Difference]: Without dead ends: 150 [2020-12-02 12:10:28,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-02 12:10:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-12-02 12:10:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-02 12:10:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 339 transitions. [2020-12-02 12:10:28,229 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 339 transitions. Word has length 12 [2020-12-02 12:10:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:28,229 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 339 transitions. [2020-12-02 12:10:28,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 12:10:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 339 transitions. [2020-12-02 12:10:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 12:10:28,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:28,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:28,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-02 12:10:28,232 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:28,232 INFO L82 PathProgramCache]: Analyzing trace with hash -610429625, now seen corresponding path program 1 times [2020-12-02 12:10:28,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:28,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491840228] [2020-12-02 12:10:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:28,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491840228] [2020-12-02 12:10:28,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:28,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 12:10:28,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517049739] [2020-12-02 12:10:28,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 12:10:28,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 12:10:28,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:28,363 INFO L87 Difference]: Start difference. First operand 150 states and 339 transitions. Second operand 5 states. [2020-12-02 12:10:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:28,452 INFO L93 Difference]: Finished difference Result 137 states and 280 transitions. [2020-12-02 12:10:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 12:10:28,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-02 12:10:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:28,455 INFO L225 Difference]: With dead ends: 137 [2020-12-02 12:10:28,455 INFO L226 Difference]: Without dead ends: 109 [2020-12-02 12:10:28,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-02 12:10:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-02 12:10:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-12-02 12:10:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-02 12:10:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2020-12-02 12:10:28,463 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 13 [2020-12-02 12:10:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:28,463 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2020-12-02 12:10:28,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 12:10:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2020-12-02 12:10:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 12:10:28,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:28,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:28,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-02 12:10:28,466 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:28,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:28,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1583313088, now seen corresponding path program 1 times [2020-12-02 12:10:28,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:28,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279300804] [2020-12-02 12:10:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:28,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279300804] [2020-12-02 12:10:28,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:28,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-02 12:10:28,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620056925] [2020-12-02 12:10:28,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 12:10:28,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:28,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 12:10:28,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-02 12:10:28,628 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand 6 states. [2020-12-02 12:10:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:28,719 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2020-12-02 12:10:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 12:10:28,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-02 12:10:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:28,722 INFO L225 Difference]: With dead ends: 98 [2020-12-02 12:10:28,722 INFO L226 Difference]: Without dead ends: 81 [2020-12-02 12:10:28,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-02 12:10:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-02 12:10:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-12-02 12:10:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-02 12:10:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 157 transitions. [2020-12-02 12:10:28,728 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 157 transitions. Word has length 15 [2020-12-02 12:10:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:28,729 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 157 transitions. [2020-12-02 12:10:28,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 12:10:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 157 transitions. [2020-12-02 12:10:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 12:10:28,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:28,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:28,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-02 12:10:28,731 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash 414255100, now seen corresponding path program 1 times [2020-12-02 12:10:28,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:28,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005129094] [2020-12-02 12:10:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:28,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005129094] [2020-12-02 12:10:28,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:28,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 12:10:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382901467] [2020-12-02 12:10:28,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 12:10:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:28,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 12:10:28,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:28,855 INFO L87 Difference]: Start difference. First operand 77 states and 157 transitions. Second operand 5 states. [2020-12-02 12:10:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:28,901 INFO L93 Difference]: Finished difference Result 76 states and 156 transitions. [2020-12-02 12:10:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 12:10:28,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-02 12:10:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:28,902 INFO L225 Difference]: With dead ends: 76 [2020-12-02 12:10:28,902 INFO L226 Difference]: Without dead ends: 0 [2020-12-02 12:10:28,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-02 12:10:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-02 12:10:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-02 12:10:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-02 12:10:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-02 12:10:28,905 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-02 12:10:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:28,905 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-02 12:10:28,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 12:10:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-02 12:10:28,906 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-02 12:10:28,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-02 12:10:28,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:10:28 BasicIcfg [2020-12-02 12:10:28,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 12:10:28,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 12:10:28,913 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 12:10:28,913 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 12:10:28,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:10:22" (3/4) ... [2020-12-02 12:10:28,920 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-02 12:10:28,931 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-02 12:10:28,931 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-02 12:10:28,931 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-02 12:10:28,939 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-02 12:10:28,940 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-02 12:10:28,940 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-02 12:10:28,940 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-02 12:10:28,994 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 12:10:28,994 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 12:10:28,996 INFO L168 Benchmark]: Toolchain (without parser) took 7999.19 ms. Allocated memory was 44.0 MB in the beginning and 119.5 MB in the end (delta: 75.5 MB). Free memory was 27.3 MB in the beginning and 62.4 MB in the end (delta: -35.1 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:28,997 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 35.7 MB. Free memory was 16.5 MB in the beginning and 16.5 MB in the end (delta: 23.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 12:10:28,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 810.25 ms. Allocated memory is still 44.0 MB. Free memory was 27.2 MB in the beginning and 26.4 MB in the end (delta: 746.0 kB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:28,998 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.17 ms. Allocated memory is still 44.0 MB. Free memory was 26.4 MB in the beginning and 24.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:28,999 INFO L168 Benchmark]: Boogie Preprocessor took 31.11 ms. Allocated memory is still 44.0 MB. Free memory was 24.5 MB in the beginning and 23.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 12:10:29,000 INFO L168 Benchmark]: RCFGBuilder took 679.97 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 23.1 MB in the beginning and 35.5 MB in the end (delta: -12.4 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:29,001 INFO L168 Benchmark]: TraceAbstraction took 6334.61 ms. Allocated memory was 54.5 MB in the beginning and 119.5 MB in the end (delta: 65.0 MB). Free memory was 35.2 MB in the beginning and 64.5 MB in the end (delta: -29.3 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:29,002 INFO L168 Benchmark]: Witness Printer took 81.57 ms. Allocated memory is still 119.5 MB. Free memory was 64.5 MB in the beginning and 62.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:29,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 35.7 MB. Free memory was 16.5 MB in the beginning and 16.5 MB in the end (delta: 23.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 810.25 ms. Allocated memory is still 44.0 MB. Free memory was 27.2 MB in the beginning and 26.4 MB in the end (delta: 746.0 kB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.17 ms. Allocated memory is still 44.0 MB. Free memory was 26.4 MB in the beginning and 24.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.11 ms. Allocated memory is still 44.0 MB. Free memory was 24.5 MB in the beginning and 23.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 679.97 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 23.1 MB in the beginning and 35.5 MB in the end (delta: -12.4 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6334.61 ms. Allocated memory was 54.5 MB in the beginning and 119.5 MB in the end (delta: 65.0 MB). Free memory was 35.2 MB in the beginning and 64.5 MB in the end (delta: -29.3 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. * Witness Printer took 81.57 ms. Allocated memory is still 119.5 MB. Free memory was 64.5 MB in the beginning and 62.4 MB in the end (delta: 2.1 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 782 VarBasedMoverChecksPositive, 33 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 29 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 67 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.9s, 83 PlacesBefore, 32 PlacesAfterwards, 75 TransitionsBefore, 23 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 61 TotalNumberOfCompositions, 2563 MoverChecksTotal - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 182 SDtfs, 182 SDslu, 307 SDs, 0 SdLazy, 121 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=362occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 3756 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...