./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe020_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe020_tso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer --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 538cc2603fc8a261463ba2a472beab37ff2c86c6 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:11:16,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:11:16,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:11:16,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:11:16,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:11:16,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:11:16,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:11:16,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:11:16,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:11:16,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:11:16,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:11:16,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:11:16,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:11:16,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:11:16,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:11:16,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:11:16,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:11:16,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:11:16,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:11:16,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:11:16,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:11:16,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:11:16,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:11:16,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:11:16,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:11:16,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:11:16,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:11:16,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:11:16,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:11:16,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:11:16,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:11:16,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:11:16,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:11:16,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:11:16,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:11:16,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:11:16,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:11:16,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:11:16,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:11:16,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:11:16,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:11:16,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:11:16,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:11:16,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:11:16,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:11:16,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:11:16,867 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:11:16,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:11:16,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:11:16,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:11:16,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:11:16,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:11:16,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:11:16,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:11:16,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:11:16,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:11:16,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:11:16,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:11:16,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:11:16,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:11:16,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:11:16,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:11:16,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:11:16,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:11:16,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:11:16,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:11:16,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:11:16,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:11:16,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:11:16,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:11:16,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:11:16,880 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:/tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 538cc2603fc8a261463ba2a472beab37ff2c86c6 [2020-12-01 15:11:17,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:11:17,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:11:17,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:11:17,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:11:17,219 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:11:17,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/../../sv-benchmarks/c/pthread-wmm/safe020_tso.oepc.i [2020-12-01 15:11:17,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/data/91b1db380/015cf2fe9e2240d4be21e0bf4c3431a4/FLAG70e042d02 [2020-12-01 15:11:17,876 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:11:17,876 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/sv-benchmarks/c/pthread-wmm/safe020_tso.oepc.i [2020-12-01 15:11:17,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/data/91b1db380/015cf2fe9e2240d4be21e0bf4c3431a4/FLAG70e042d02 [2020-12-01 15:11:18,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/data/91b1db380/015cf2fe9e2240d4be21e0bf4c3431a4 [2020-12-01 15:11:18,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:11:18,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:11:18,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:11:18,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:11:18,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:11:18,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79055ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18, skipping insertion in model container [2020-12-01 15:11:18,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:11:18,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:11:18,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:11:18,640 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:11:18,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:11:18,767 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:11:18,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18 WrapperNode [2020-12-01 15:11:18,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:11:18,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:11:18,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:11:18,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:11:18,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:11:18,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:11:18,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:11:18,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:11:18,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... [2020-12-01 15:11:18,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:11:18,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:11:18,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:11:18,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:11:18,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/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 [2020-12-01 15:11:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:11:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-01 15:11:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:11:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:11:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-01 15:11:18,962 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-01 15:11:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-01 15:11:18,963 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-01 15:11:18,963 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-01 15:11:18,964 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-01 15:11:18,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:11:18,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-01 15:11:18,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:11:18,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:11:18,967 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-01 15:11:19,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:11:19,354 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-01 15:11:19,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:11:19 BoogieIcfgContainer [2020-12-01 15:11:19,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:11:19,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:11:19,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:11:19,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:11:19,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:11:18" (1/3) ... [2020-12-01 15:11:19,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507a4e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:11:19, skipping insertion in model container [2020-12-01 15:11:19,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:11:18" (2/3) ... [2020-12-01 15:11:19,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507a4e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:11:19, skipping insertion in model container [2020-12-01 15:11:19,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:11:19" (3/3) ... [2020-12-01 15:11:19,373 INFO L111 eAbstractionObserver]: Analyzing ICFG safe020_tso.oepc.i [2020-12-01 15:11:19,389 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-01 15:11:19,390 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:11:19,393 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:11:19,393 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-01 15:11:19,433 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,433 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,434 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,434 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,434 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,434 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,435 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,435 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,436 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,443 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,444 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,444 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,444 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,444 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,445 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,445 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,445 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,445 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,445 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,445 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,446 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,446 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,446 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,446 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,447 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,447 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,447 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,448 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,448 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,448 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,448 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,448 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,449 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,449 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,449 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,449 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,452 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,452 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,452 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,452 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,466 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,466 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,466 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,467 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,472 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,472 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,472 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,473 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-01 15:11:19,477 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-01 15:11:19,487 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-01 15:11:19,506 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:11:19,506 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:11:19,506 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:11:19,506 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:11:19,506 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:11:19,506 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:11:19,507 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:11:19,507 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:11:19,533 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-01 15:11:19,535 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 77 transitions, 169 flow [2020-12-01 15:11:19,538 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 77 transitions, 169 flow [2020-12-01 15:11:19,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 77 transitions, 169 flow [2020-12-01 15:11:19,584 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2020-12-01 15:11:19,584 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-01 15:11:19,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2020-12-01 15:11:19,592 INFO L116 LiptonReduction]: Number of co-enabled transitions 1348 [2020-12-01 15:11:22,308 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-01 15:11:22,481 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-01 15:11:23,250 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-01 15:11:23,540 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-01 15:11:24,082 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-01 15:11:24,211 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-01 15:11:24,232 INFO L131 LiptonReduction]: Checked pairs total: 3056 [2020-12-01 15:11:24,232 INFO L133 LiptonReduction]: Total number of compositions: 75 [2020-12-01 15:11:24,238 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 21 transitions, 57 flow [2020-12-01 15:11:24,260 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 226 states. [2020-12-01 15:11:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states. [2020-12-01 15:11:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 15:11:24,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:24,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:24,269 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:24,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1972841711, now seen corresponding path program 1 times [2020-12-01 15:11:24,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:24,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862400295] [2020-12-01 15:11:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:24,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862400295] [2020-12-01 15:11:24,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:24,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-01 15:11:24,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380209983] [2020-12-01 15:11:24,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:11:24,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:24,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:11:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:11:24,544 INFO L87 Difference]: Start difference. First operand 226 states. Second operand 3 states. [2020-12-01 15:11:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:24,604 INFO L93 Difference]: Finished difference Result 220 states and 612 transitions. [2020-12-01 15:11:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:11:24,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-01 15:11:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:24,631 INFO L225 Difference]: With dead ends: 220 [2020-12-01 15:11:24,632 INFO L226 Difference]: Without dead ends: 172 [2020-12-01 15:11:24,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:11:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-01 15:11:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-12-01 15:11:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-01 15:11:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 460 transitions. [2020-12-01 15:11:24,742 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 460 transitions. Word has length 8 [2020-12-01 15:11:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:24,743 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 460 transitions. [2020-12-01 15:11:24,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:11:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 460 transitions. [2020-12-01 15:11:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:11:24,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:24,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:24,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:11:24,750 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549814, now seen corresponding path program 1 times [2020-12-01 15:11:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:24,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278195094] [2020-12-01 15:11:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:24,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278195094] [2020-12-01 15:11:24,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:24,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-01 15:11:24,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685750943] [2020-12-01 15:11:24,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:11:24,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:11:24,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:11:24,859 INFO L87 Difference]: Start difference. First operand 172 states and 460 transitions. Second operand 3 states. [2020-12-01 15:11:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:24,873 INFO L93 Difference]: Finished difference Result 163 states and 430 transitions. [2020-12-01 15:11:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:11:24,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-01 15:11:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:24,876 INFO L225 Difference]: With dead ends: 163 [2020-12-01 15:11:24,878 INFO L226 Difference]: Without dead ends: 163 [2020-12-01 15:11:24,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:11:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-01 15:11:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-12-01 15:11:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-01 15:11:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 430 transitions. [2020-12-01 15:11:24,896 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 430 transitions. Word has length 9 [2020-12-01 15:11:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:24,897 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 430 transitions. [2020-12-01 15:11:24,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:11:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 430 transitions. [2020-12-01 15:11:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:11:24,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:24,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:24,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:11:24,903 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1819291053, now seen corresponding path program 1 times [2020-12-01 15:11:24,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:24,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881404729] [2020-12-01 15:11:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:24,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881404729] [2020-12-01 15:11:24,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:24,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:11:24,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278828473] [2020-12-01 15:11:24,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-01 15:11:24,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:11:24,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:11:24,977 INFO L87 Difference]: Start difference. First operand 163 states and 430 transitions. Second operand 3 states. [2020-12-01 15:11:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:24,996 INFO L93 Difference]: Finished difference Result 211 states and 528 transitions. [2020-12-01 15:11:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:11:24,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-01 15:11:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:25,000 INFO L225 Difference]: With dead ends: 211 [2020-12-01 15:11:25,001 INFO L226 Difference]: Without dead ends: 175 [2020-12-01 15:11:25,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:11:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-01 15:11:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 157. [2020-12-01 15:11:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-01 15:11:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 393 transitions. [2020-12-01 15:11:25,031 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 393 transitions. Word has length 10 [2020-12-01 15:11:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:25,032 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 393 transitions. [2020-12-01 15:11:25,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-01 15:11:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 393 transitions. [2020-12-01 15:11:25,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:11:25,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:25,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:25,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:11:25,040 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:25,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1819353363, now seen corresponding path program 1 times [2020-12-01 15:11:25,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:25,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566793515] [2020-12-01 15:11:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:25,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566793515] [2020-12-01 15:11:25,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:25,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:11:25,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501189910] [2020-12-01 15:11:25,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:11:25,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:25,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:11:25,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:11:25,148 INFO L87 Difference]: Start difference. First operand 157 states and 393 transitions. Second operand 4 states. [2020-12-01 15:11:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:25,182 INFO L93 Difference]: Finished difference Result 196 states and 467 transitions. [2020-12-01 15:11:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:11:25,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-01 15:11:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:25,184 INFO L225 Difference]: With dead ends: 196 [2020-12-01 15:11:25,184 INFO L226 Difference]: Without dead ends: 124 [2020-12-01 15:11:25,185 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 [2020-12-01 15:11:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-01 15:11:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-12-01 15:11:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-01 15:11:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 291 transitions. [2020-12-01 15:11:25,194 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 291 transitions. Word has length 10 [2020-12-01 15:11:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:25,194 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 291 transitions. [2020-12-01 15:11:25,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:11:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 291 transitions. [2020-12-01 15:11:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:11:25,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:25,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:25,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 15:11:25,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1404816041, now seen corresponding path program 1 times [2020-12-01 15:11:25,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:25,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145042959] [2020-12-01 15:11:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:25,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145042959] [2020-12-01 15:11:25,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:25,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:11:25,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495497181] [2020-12-01 15:11:25,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:11:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:11:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:11:25,308 INFO L87 Difference]: Start difference. First operand 124 states and 291 transitions. Second operand 4 states. [2020-12-01 15:11:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:25,348 INFO L93 Difference]: Finished difference Result 144 states and 309 transitions. [2020-12-01 15:11:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:11:25,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-01 15:11:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:25,350 INFO L225 Difference]: With dead ends: 144 [2020-12-01 15:11:25,350 INFO L226 Difference]: Without dead ends: 108 [2020-12-01 15:11:25,350 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 [2020-12-01 15:11:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-01 15:11:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-12-01 15:11:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-01 15:11:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 232 transitions. [2020-12-01 15:11:25,366 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 232 transitions. Word has length 11 [2020-12-01 15:11:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:25,366 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 232 transitions. [2020-12-01 15:11:25,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:11:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 232 transitions. [2020-12-01 15:11:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:11:25,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:25,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:25,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-01 15:11:25,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash 693308811, now seen corresponding path program 1 times [2020-12-01 15:11:25,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:25,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168591020] [2020-12-01 15:11:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:25,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168591020] [2020-12-01 15:11:25,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:25,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:11:25,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762659729] [2020-12-01 15:11:25,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:11:25,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:11:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:11:25,440 INFO L87 Difference]: Start difference. First operand 108 states and 232 transitions. Second operand 5 states. [2020-12-01 15:11:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:25,485 INFO L93 Difference]: Finished difference Result 108 states and 214 transitions. [2020-12-01 15:11:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:11:25,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-01 15:11:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:25,487 INFO L225 Difference]: With dead ends: 108 [2020-12-01 15:11:25,487 INFO L226 Difference]: Without dead ends: 84 [2020-12-01 15:11:25,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:11:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-01 15:11:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-01 15:11:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-01 15:11:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2020-12-01 15:11:25,491 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 12 [2020-12-01 15:11:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:25,491 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2020-12-01 15:11:25,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:11:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2020-12-01 15:11:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 15:11:25,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:25,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:25,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-01 15:11:25,492 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 489181955, now seen corresponding path program 1 times [2020-12-01 15:11:25,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:25,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10302041] [2020-12-01 15:11:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:25,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10302041] [2020-12-01 15:11:25,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:25,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:11:25,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143605298] [2020-12-01 15:11:25,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:11:25,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:25,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:11:25,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:11:25,555 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand 6 states. [2020-12-01 15:11:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:25,637 INFO L93 Difference]: Finished difference Result 80 states and 154 transitions. [2020-12-01 15:11:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:11:25,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-01 15:11:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:25,638 INFO L225 Difference]: With dead ends: 80 [2020-12-01 15:11:25,638 INFO L226 Difference]: Without dead ends: 33 [2020-12-01 15:11:25,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:11:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-01 15:11:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-01 15:11:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-01 15:11:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2020-12-01 15:11:25,640 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 14 [2020-12-01 15:11:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:25,640 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2020-12-01 15:11:25,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:11:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2020-12-01 15:11:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:11:25,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:11:25,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:11:25,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-01 15:11:25,641 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:11:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:11:25,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1917932335, now seen corresponding path program 1 times [2020-12-01 15:11:25,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:11:25,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927928140] [2020-12-01 15:11:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:11:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:11:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:11:25,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927928140] [2020-12-01 15:11:25,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:11:25,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:11:25,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687459710] [2020-12-01 15:11:25,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:11:25,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:11:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:11:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:11:25,711 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand 4 states. [2020-12-01 15:11:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:11:25,726 INFO L93 Difference]: Finished difference Result 32 states and 50 transitions. [2020-12-01 15:11:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:11:25,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-01 15:11:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:11:25,726 INFO L225 Difference]: With dead ends: 32 [2020-12-01 15:11:25,726 INFO L226 Difference]: Without dead ends: 0 [2020-12-01 15:11:25,727 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 [2020-12-01 15:11:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-01 15:11:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-01 15:11:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-01 15:11:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-01 15:11:25,728 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-12-01 15:11:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:11:25,728 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:11:25,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:11:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-01 15:11:25,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-01 15:11:25,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-01 15:11:25,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:11:25 BasicIcfg [2020-12-01 15:11:25,733 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:11:25,734 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:11:25,734 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:11:25,734 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:11:25,735 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:11:19" (3/4) ... [2020-12-01 15:11:25,739 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-01 15:11:25,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-01 15:11:25,746 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-01 15:11:25,746 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-01 15:11:25,753 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-01 15:11:25,753 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-01 15:11:25,753 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 15:11:25,753 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-01 15:11:25,803 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7251bb8d-d6da-42cc-9796-0e5a8cdfd60b/bin/uautomizer/witness.graphml [2020-12-01 15:11:25,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:11:25,805 INFO L168 Benchmark]: Toolchain (without parser) took 7619.76 ms. Allocated memory was 90.2 MB in the beginning and 161.5 MB in the end (delta: 71.3 MB). Free memory was 55.8 MB in the beginning and 118.7 MB in the end (delta: -62.9 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:25,805 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 60.9 MB in the beginning and 60.9 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:11:25,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.76 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 44.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:25,806 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.62 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 43.7 MB in the beginning and 86.6 MB in the end (delta: -42.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:25,807 INFO L168 Benchmark]: Boogie Preprocessor took 25.62 ms. Allocated memory is still 109.1 MB. Free memory was 86.6 MB in the beginning and 85.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:25,807 INFO L168 Benchmark]: RCFGBuilder took 504.30 ms. Allocated memory is still 109.1 MB. Free memory was 85.0 MB in the beginning and 63.6 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:25,808 INFO L168 Benchmark]: TraceAbstraction took 6370.00 ms. Allocated memory was 109.1 MB in the beginning and 161.5 MB in the end (delta: 52.4 MB). Free memory was 63.1 MB in the beginning and 121.9 MB in the end (delta: -58.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:11:25,808 INFO L168 Benchmark]: Witness Printer took 69.90 ms. Allocated memory is still 161.5 MB. Free memory was 121.9 MB in the beginning and 118.7 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:11:25,811 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 60.9 MB in the beginning and 60.9 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 573.76 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 44.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.62 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 43.7 MB in the beginning and 86.6 MB in the end (delta: -42.9 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.62 ms. Allocated memory is still 109.1 MB. Free memory was 86.6 MB in the beginning and 85.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 504.30 ms. Allocated memory is still 109.1 MB. Free memory was 85.0 MB in the beginning and 63.6 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6370.00 ms. Allocated memory was 109.1 MB in the beginning and 161.5 MB in the end (delta: 52.4 MB). Free memory was 63.1 MB in the beginning and 121.9 MB in the end (delta: -58.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 69.90 ms. Allocated memory is still 161.5 MB. Free memory was 121.9 MB in the beginning and 118.7 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 936 VarBasedMoverChecksPositive, 44 VarBasedMoverChecksNegative, 8 SemBasedMoverChecksPositive, 36 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 72 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.6s, 84 PlacesBefore, 30 PlacesAfterwards, 77 TransitionsBefore, 21 TransitionsAfterwards, 1348 CoEnabledTransitionPairs, 7 FixpointIterations, 17 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 75 TotalNumberOfCompositions, 3056 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 4 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.7s, HoareTripleCheckerStatistics: 134 SDtfs, 110 SDslu, 162 SDs, 0 SdLazy, 101 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=226occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 2696 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...