./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/thin000_pso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/thin000_pso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d03eab5d7eb3076e43fdbc822f0c202dd7957a2 ......................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:58:46,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:58:46,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:58:46,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:58:46,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:58:46,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:58:46,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:58:46,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:58:46,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:58:46,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:58:46,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:58:46,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:58:46,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:58:46,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:58:46,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:58:46,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:58:46,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:58:46,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:58:46,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:58:46,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:58:46,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:58:46,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:58:46,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:58:46,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:58:46,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:58:46,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:58:46,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:58:46,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:58:46,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:58:46,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:58:46,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:58:46,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:58:46,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:58:46,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:58:46,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:58:46,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:58:46,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:58:46,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:58:46,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:58:46,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:58:46,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:58:46,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:58:46,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:58:46,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:58:46,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:58:46,807 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:58:46,807 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:58:46,808 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:58:46,808 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:58:46,808 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:58:46,808 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:58:46,809 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:58:46,809 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:58:46,809 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:58:46,809 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:58:46,810 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:58:46,810 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:58:46,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:58:46,811 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:58:46,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:58:46,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:58:46,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:58:46,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:58:46,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:58:46,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:58:46,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:58:46,813 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:58:46,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:58:46,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:58:46,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:58:46,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:58:46,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:58:46,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:58:46,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:58:46,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:58:46,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:58:46,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:58:46,815 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:58:46,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:58:46,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:58:46,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:58:46,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:58:46,816 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d03eab5d7eb3076e43fdbc822f0c202dd7957a2 [2020-11-22 12:58:47,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:58:47,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:58:47,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:58:47,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:58:47,085 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:58:47,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/thin000_pso.oepc.i [2020-11-22 12:58:47,172 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/data/43af624f1/e3631fe8829a4a9c869f8c39d6f1dca0/FLAG13fcfed91 [2020-11-22 12:58:47,753 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:58:47,754 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/sv-benchmarks/c/pthread-wmm/thin000_pso.oepc.i [2020-11-22 12:58:47,774 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/data/43af624f1/e3631fe8829a4a9c869f8c39d6f1dca0/FLAG13fcfed91 [2020-11-22 12:58:48,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/data/43af624f1/e3631fe8829a4a9c869f8c39d6f1dca0 [2020-11-22 12:58:48,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:58:48,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:58:48,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:58:48,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:58:48,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:58:48,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309c0151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48, skipping insertion in model container [2020-11-22 12:58:48,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:58:48,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:58:48,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:58:48,596 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:58:48,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:58:48,758 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:58:48,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48 WrapperNode [2020-11-22 12:58:48,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:58:48,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:58:48,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:58:48,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:58:48,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:58:48,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:58:48,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:58:48,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:58:48,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... [2020-11-22 12:58:48,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:58:48,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:58:48,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:58:48,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:58:48,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/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 [2020-11-22 12:58:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:58:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 12:58:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:58:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:58:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 12:58:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 12:58:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 12:58:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 12:58:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:58:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 12:58:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:58:48,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:58:48,899 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-22 12:58:49,339 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:58:49,339 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 12:58:49,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:49 BoogieIcfgContainer [2020-11-22 12:58:49,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:58:49,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:58:49,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:58:49,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:58:49,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:58:48" (1/3) ... [2020-11-22 12:58:49,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e989f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:58:49, skipping insertion in model container [2020-11-22 12:58:49,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:48" (2/3) ... [2020-11-22 12:58:49,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e989f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:58:49, skipping insertion in model container [2020-11-22 12:58:49,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:49" (3/3) ... [2020-11-22 12:58:49,350 INFO L111 eAbstractionObserver]: Analyzing ICFG thin000_pso.oepc.i [2020-11-22 12:58:49,359 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:58:49,359 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:58:49,366 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:58:49,367 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:58:49,394 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,394 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,394 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,395 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,395 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,395 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,396 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,396 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,396 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,396 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,396 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,397 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,399 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,399 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,399 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,399 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,413 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,413 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,413 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,414 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:58:49,415 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 12:58:49,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 12:58:49,449 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:58:49,450 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:58:49,450 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:58:49,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:58:49,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:58:49,450 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:58:49,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:58:49,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:58:49,461 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:58:49,463 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 65 transitions, 140 flow [2020-11-22 12:58:49,466 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 65 transitions, 140 flow [2020-11-22 12:58:49,468 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 69 places, 65 transitions, 140 flow [2020-11-22 12:58:49,521 INFO L129 PetriNetUnfolder]: 3/63 cut-off events. [2020-11-22 12:58:49,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 12:58:49,530 INFO L80 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 63 events. 3/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-22 12:58:49,536 INFO L116 LiptonReduction]: Number of co-enabled transitions 792 [2020-11-22 12:58:51,320 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-11-22 12:58:51,737 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-11-22 12:58:51,852 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-22 12:58:51,905 INFO L131 LiptonReduction]: Checked pairs total: 1892 [2020-11-22 12:58:51,905 INFO L133 LiptonReduction]: Total number of compositions: 66 [2020-11-22 12:58:51,912 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 17 transitions, 44 flow [2020-11-22 12:58:51,927 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 90 states. [2020-11-22 12:58:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2020-11-22 12:58:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:58:51,934 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:51,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:58:51,935 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:51,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:51,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1281927427, now seen corresponding path program 1 times [2020-11-22 12:58:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:51,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121773052] [2020-11-22 12:58:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:52,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121773052] [2020-11-22 12:58:52,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:52,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:58:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478964990] [2020-11-22 12:58:52,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:58:52,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:58:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:58:52,111 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 2 states. [2020-11-22 12:58:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:52,127 INFO L93 Difference]: Finished difference Result 90 states and 200 transitions. [2020-11-22 12:58:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:58:52,128 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-22 12:58:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:52,137 INFO L225 Difference]: With dead ends: 90 [2020-11-22 12:58:52,137 INFO L226 Difference]: Without dead ends: 74 [2020-11-22 12:58:52,138 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 [2020-11-22 12:58:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-22 12:58:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-22 12:58:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-22 12:58:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2020-11-22 12:58:52,177 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 6 [2020-11-22 12:58:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:52,177 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2020-11-22 12:58:52,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:58:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2020-11-22 12:58:52,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:58:52,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:52,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:58:52,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:58:52,179 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1085050971, now seen corresponding path program 1 times [2020-11-22 12:58:52,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:52,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130912265] [2020-11-22 12:58:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:52,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130912265] [2020-11-22 12:58:52,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:52,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:58:52,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141889972] [2020-11-22 12:58:52,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:58:52,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:58:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:58:52,310 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 4 states. [2020-11-22 12:58:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:52,356 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2020-11-22 12:58:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:58:52,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 12:58:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:52,359 INFO L225 Difference]: With dead ends: 82 [2020-11-22 12:58:52,359 INFO L226 Difference]: Without dead ends: 66 [2020-11-22 12:58:52,359 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 [2020-11-22 12:58:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-22 12:58:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-22 12:58:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-22 12:58:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 138 transitions. [2020-11-22 12:58:52,369 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 138 transitions. Word has length 7 [2020-11-22 12:58:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:52,369 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 138 transitions. [2020-11-22 12:58:52,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:58:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 138 transitions. [2020-11-22 12:58:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:58:52,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:52,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:58:52,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:58:52,371 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash 722349434, now seen corresponding path program 1 times [2020-11-22 12:58:52,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:52,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049706039] [2020-11-22 12:58:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:52,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049706039] [2020-11-22 12:58:52,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:52,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:58:52,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614090565] [2020-11-22 12:58:52,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:58:52,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:52,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:58:52,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:58:52,506 INFO L87 Difference]: Start difference. First operand 66 states and 138 transitions. Second operand 6 states. [2020-11-22 12:58:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:52,611 INFO L93 Difference]: Finished difference Result 78 states and 155 transitions. [2020-11-22 12:58:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:58:52,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-22 12:58:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:52,615 INFO L225 Difference]: With dead ends: 78 [2020-11-22 12:58:52,615 INFO L226 Difference]: Without dead ends: 42 [2020-11-22 12:58:52,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:58:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-22 12:58:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-22 12:58:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-22 12:58:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 76 transitions. [2020-11-22 12:58:52,621 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 76 transitions. Word has length 8 [2020-11-22 12:58:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:52,621 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 76 transitions. [2020-11-22 12:58:52,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:58:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 76 transitions. [2020-11-22 12:58:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:58:52,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:52,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:58:52,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:58:52,622 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1631439828, now seen corresponding path program 1 times [2020-11-22 12:58:52,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:52,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965561662] [2020-11-22 12:58:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:52,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965561662] [2020-11-22 12:58:52,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:52,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:58:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498305848] [2020-11-22 12:58:52,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:58:52,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:58:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:58:52,746 INFO L87 Difference]: Start difference. First operand 42 states and 76 transitions. Second operand 6 states. [2020-11-22 12:58:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:52,856 INFO L93 Difference]: Finished difference Result 36 states and 63 transitions. [2020-11-22 12:58:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:58:52,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-22 12:58:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:52,857 INFO L225 Difference]: With dead ends: 36 [2020-11-22 12:58:52,857 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:58:52,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:58:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:58:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:58:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:58:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:58:52,858 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-11-22 12:58:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:52,858 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:58:52,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:58:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:58:52,858 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:58:52,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:58:52,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:58:52 BasicIcfg [2020-11-22 12:58:52,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:58:52,862 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:58:52,862 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:58:52,862 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:58:52,862 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:49" (3/4) ... [2020-11-22 12:58:52,866 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:58:52,871 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 12:58:52,871 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 12:58:52,875 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-11-22 12:58:52,875 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:58:52,875 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:58:52,875 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:58:52,920 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4e97f960-4e40-4b2a-916c-ae75f1d750b6/bin/utaipan/witness.graphml [2020-11-22 12:58:52,921 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:58:52,922 INFO L168 Benchmark]: Toolchain (without parser) took 4901.96 ms. Allocated memory was 100.7 MB in the beginning and 155.2 MB in the end (delta: 54.5 MB). Free memory was 74.6 MB in the beginning and 111.5 MB in the end (delta: -36.9 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:52,923 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 100.7 MB. Free memory is still 57.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:52,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 738.33 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 74.4 MB in the beginning and 84.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:52,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.56 ms. Allocated memory is still 127.9 MB. Free memory was 84.7 MB in the beginning and 83.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:52,924 INFO L168 Benchmark]: Boogie Preprocessor took 26.00 ms. Allocated memory is still 127.9 MB. Free memory was 83.1 MB in the beginning and 81.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:52,925 INFO L168 Benchmark]: RCFGBuilder took 511.23 ms. Allocated memory is still 127.9 MB. Free memory was 81.8 MB in the beginning and 62.0 MB in the end (delta: 19.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:52,925 INFO L168 Benchmark]: TraceAbstraction took 3518.19 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 61.6 MB in the beginning and 114.6 MB in the end (delta: -53.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:52,926 INFO L168 Benchmark]: Witness Printer took 59.02 ms. Allocated memory is still 155.2 MB. Free memory was 114.6 MB in the beginning and 111.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:52,930 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 100.7 MB. Free memory is still 57.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 738.33 ms. Allocated memory was 100.7 MB in the beginning and 127.9 MB in the end (delta: 27.3 MB). Free memory was 74.4 MB in the beginning and 84.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.56 ms. Allocated memory is still 127.9 MB. Free memory was 84.7 MB in the beginning and 83.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.00 ms. Allocated memory is still 127.9 MB. Free memory was 83.1 MB in the beginning and 81.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 511.23 ms. Allocated memory is still 127.9 MB. Free memory was 81.8 MB in the beginning and 62.0 MB in the end (delta: 19.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3518.19 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 61.6 MB in the beginning and 114.6 MB in the end (delta: -53.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 59.02 ms. Allocated memory is still 155.2 MB. Free memory was 114.6 MB in the beginning and 111.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 543 VarBasedMoverChecksPositive, 24 VarBasedMoverChecksNegative, 2 SemBasedMoverChecksPositive, 22 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 43 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.4s, 69 PlacesBefore, 23 PlacesAfterwards, 65 TransitionsBefore, 17 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 7 FixpointIterations, 17 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 2 ChoiceCompositions, 66 TotalNumberOfCompositions, 1892 MoverChecksTotal - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 51 SDtfs, 76 SDslu, 69 SDs, 0 SdLazy, 65 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred 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: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 1063 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...