./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe024_tso.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_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe024_tso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/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 1468379dc280e03cd79ccd34c208a639d6a349fa ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:48:25,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:48:25,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:48:25,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:48:25,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:48:25,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:48:25,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:48:25,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:48:25,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:48:25,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:48:25,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:48:25,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:48:25,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:48:25,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:48:25,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:48:25,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:48:25,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:48:25,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:48:25,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:48:25,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:48:25,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:48:25,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:48:25,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:48:25,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:48:25,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:48:25,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:48:25,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:48:25,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:48:25,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:48:25,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:48:25,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:48:25,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:48:25,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:48:25,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:48:25,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:48:25,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:48:25,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:48:25,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:48:25,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:48:25,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:48:25,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:48:25,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:48:25,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:48:25,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:48:25,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:48:25,636 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:48:25,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:48:25,636 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:48:25,637 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:48:25,637 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:48:25,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:48:25,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:48:25,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:48:25,638 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:48:25,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:48:25,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:48:25,639 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:48:25,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:48:25,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:48:25,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:48:25,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:48:25,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:48:25,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:48:25,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:48:25,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:48:25,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:48:25,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:48:25,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:48:25,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:48:25,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:48:25,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:48:25,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:48:25,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:48:25,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:48:25,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:48:25,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:48:25,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:48:25,647 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:48:25,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:48:25,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:48:25,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:48:25,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:48:25,648 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_a4c63ff1-e595-405d-9662-f8c358ed0b99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1468379dc280e03cd79ccd34c208a639d6a349fa [2020-11-22 12:48:25,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:48:25,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:48:25,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:48:25,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:48:25,956 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:48:25,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe024_tso.oepc.i [2020-11-22 12:48:26,034 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/data/57f64f094/ce71a5a6192840c786ccdb83870237d6/FLAGb5095bebe [2020-11-22 12:48:26,857 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:48:26,858 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/sv-benchmarks/c/pthread-wmm/safe024_tso.oepc.i [2020-11-22 12:48:26,875 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/data/57f64f094/ce71a5a6192840c786ccdb83870237d6/FLAGb5095bebe [2020-11-22 12:48:27,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/data/57f64f094/ce71a5a6192840c786ccdb83870237d6 [2020-11-22 12:48:27,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:48:27,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:48:27,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:27,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:48:27,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:48:27,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbe001a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27, skipping insertion in model container [2020-11-22 12:48:27,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:48:27,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:48:27,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:27,680 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:48:27,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:27,893 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:48:27,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27 WrapperNode [2020-11-22 12:48:27,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:27,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:27,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:48:27,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:48:27,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:27,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:48:27,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:48:27,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:48:27,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... [2020-11-22 12:48:27,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:48:28,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:48:28,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:48:28,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:48:28,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/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 12:48:28,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:48:28,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 12:48:28,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:48:28,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:48:28,118 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 12:48:28,118 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 12:48:28,119 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 12:48:28,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 12:48:28,119 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-22 12:48:28,120 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-22 12:48:28,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:48:28,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 12:48:28,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:48:28,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:48:28,123 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 12:48:28,733 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:48:28,734 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 12:48:28,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:28 BoogieIcfgContainer [2020-11-22 12:48:28,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:48:28,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:48:28,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:48:28,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:48:28,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:48:27" (1/3) ... [2020-11-22 12:48:28,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe1ca90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:28, skipping insertion in model container [2020-11-22 12:48:28,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:27" (2/3) ... [2020-11-22 12:48:28,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe1ca90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:28, skipping insertion in model container [2020-11-22 12:48:28,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:28" (3/3) ... [2020-11-22 12:48:28,747 INFO L111 eAbstractionObserver]: Analyzing ICFG safe024_tso.oepc.i [2020-11-22 12:48:28,760 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:48:28,761 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:48:28,766 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:48:28,767 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:48:28,805 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,805 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,805 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,805 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,806 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,806 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,807 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,807 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,807 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,807 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,808 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,808 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,808 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,809 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,809 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,809 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,809 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,810 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,812 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,813 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,813 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,813 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,822 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,823 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,823 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,823 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,827 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,827 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,827 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,827 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:48:28,830 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 12:48:28,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 12:48:28,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:48:28,868 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:48:28,868 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:48:28,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:48:28,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:48:28,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:48:28,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:48:28,869 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:48:28,881 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:48:28,883 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 80 transitions, 175 flow [2020-11-22 12:48:28,886 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 80 transitions, 175 flow [2020-11-22 12:48:28,888 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 87 places, 80 transitions, 175 flow [2020-11-22 12:48:28,940 INFO L129 PetriNetUnfolder]: 3/77 cut-off events. [2020-11-22 12:48:28,941 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 12:48:28,950 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 3/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2020-11-22 12:48:28,953 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2020-11-22 12:48:29,482 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-22 12:48:30,952 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-11-22 12:48:32,151 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-11-22 12:48:32,259 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-22 12:48:32,510 INFO L131 LiptonReduction]: Checked pairs total: 3412 [2020-11-22 12:48:32,510 INFO L133 LiptonReduction]: Total number of compositions: 77 [2020-11-22 12:48:32,515 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-11-22 12:48:32,545 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-11-22 12:48:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-11-22 12:48:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:48:32,554 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:32,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:32,555 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1698580066, now seen corresponding path program 1 times [2020-11-22 12:48:32,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:32,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237255939] [2020-11-22 12:48:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:32,768 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 12:48:32,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237255939] [2020-11-22 12:48:32,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:32,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:48:32,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676111148] [2020-11-22 12:48:32,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:48:32,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:32,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:48:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:48:32,787 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-11-22 12:48:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:32,855 INFO L93 Difference]: Finished difference Result 282 states and 808 transitions. [2020-11-22 12:48:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:48:32,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-22 12:48:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:32,885 INFO L225 Difference]: With dead ends: 282 [2020-11-22 12:48:32,886 INFO L226 Difference]: Without dead ends: 218 [2020-11-22 12:48:32,890 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 [2020-11-22 12:48:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-11-22 12:48:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-11-22 12:48:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-11-22 12:48:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 600 transitions. [2020-11-22 12:48:33,017 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 600 transitions. Word has length 8 [2020-11-22 12:48:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:33,019 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 600 transitions. [2020-11-22 12:48:33,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:48:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 600 transitions. [2020-11-22 12:48:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 12:48:33,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:33,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:33,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:48:33,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1116373545, now seen corresponding path program 1 times [2020-11-22 12:48:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:33,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480943725] [2020-11-22 12:48:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:33,168 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 12:48:33,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480943725] [2020-11-22 12:48:33,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:33,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:48:33,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10533146] [2020-11-22 12:48:33,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:48:33,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:33,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:48:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:48:33,171 INFO L87 Difference]: Start difference. First operand 218 states and 600 transitions. Second operand 4 states. [2020-11-22 12:48:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:33,202 INFO L93 Difference]: Finished difference Result 242 states and 634 transitions. [2020-11-22 12:48:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:48:33,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 12:48:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:33,205 INFO L225 Difference]: With dead ends: 242 [2020-11-22 12:48:33,205 INFO L226 Difference]: Without dead ends: 146 [2020-11-22 12:48:33,206 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 12:48:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-22 12:48:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-11-22 12:48:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-22 12:48:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-11-22 12:48:33,220 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 9 [2020-11-22 12:48:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:33,220 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-11-22 12:48:33,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:48:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-11-22 12:48:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:48:33,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:33,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:33,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:48:33,223 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -906978528, now seen corresponding path program 1 times [2020-11-22 12:48:33,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:33,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638918042] [2020-11-22 12:48:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:33,390 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 12:48:33,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638918042] [2020-11-22 12:48:33,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:33,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:48:33,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391506561] [2020-11-22 12:48:33,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:48:33,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:48:33,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:48:33,393 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 4 states. [2020-11-22 12:48:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:33,439 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-11-22 12:48:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:48:33,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 12:48:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:33,441 INFO L225 Difference]: With dead ends: 165 [2020-11-22 12:48:33,441 INFO L226 Difference]: Without dead ends: 125 [2020-11-22 12:48:33,442 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 12:48:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-22 12:48:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-11-22 12:48:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-22 12:48:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 284 transitions. [2020-11-22 12:48:33,453 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 284 transitions. Word has length 11 [2020-11-22 12:48:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:33,453 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 284 transitions. [2020-11-22 12:48:33,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:48:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 284 transitions. [2020-11-22 12:48:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:48:33,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:33,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:33,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:48:33,456 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:33,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:33,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1053183531, now seen corresponding path program 1 times [2020-11-22 12:48:33,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:33,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081147493] [2020-11-22 12:48:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:33,547 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 12:48:33,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081147493] [2020-11-22 12:48:33,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:33,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:48:33,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792666002] [2020-11-22 12:48:33,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:48:33,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:48:33,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:48:33,550 INFO L87 Difference]: Start difference. First operand 125 states and 284 transitions. Second operand 5 states. [2020-11-22 12:48:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:33,609 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2020-11-22 12:48:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:48:33,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-22 12:48:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:33,611 INFO L225 Difference]: With dead ends: 122 [2020-11-22 12:48:33,611 INFO L226 Difference]: Without dead ends: 97 [2020-11-22 12:48:33,611 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 [2020-11-22 12:48:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-22 12:48:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-11-22 12:48:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-22 12:48:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 202 transitions. [2020-11-22 12:48:33,620 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 202 transitions. Word has length 12 [2020-11-22 12:48:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:33,620 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 202 transitions. [2020-11-22 12:48:33,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:48:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 202 transitions. [2020-11-22 12:48:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 12:48:33,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:33,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:33,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:48:33,623 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1529886427, now seen corresponding path program 1 times [2020-11-22 12:48:33,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:33,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964105614] [2020-11-22 12:48:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:33,759 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 12:48:33,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964105614] [2020-11-22 12:48:33,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:33,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:48:33,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912646479] [2020-11-22 12:48:33,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:48:33,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:48:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:48:33,762 INFO L87 Difference]: Start difference. First operand 97 states and 202 transitions. Second operand 6 states. [2020-11-22 12:48:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:33,882 INFO L93 Difference]: Finished difference Result 92 states and 190 transitions. [2020-11-22 12:48:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:48:33,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-22 12:48:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:33,887 INFO L225 Difference]: With dead ends: 92 [2020-11-22 12:48:33,887 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 12:48:33,888 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 [2020-11-22 12:48:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 12:48:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-22 12:48:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-22 12:48:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2020-11-22 12:48:33,892 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 14 [2020-11-22 12:48:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:33,892 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2020-11-22 12:48:33,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:48:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2020-11-22 12:48:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:48:33,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:33,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:33,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:48:33,894 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:33,894 INFO L82 PathProgramCache]: Analyzing trace with hash 212367058, now seen corresponding path program 1 times [2020-11-22 12:48:33,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:33,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230203777] [2020-11-22 12:48:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:33,992 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 12:48:33,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230203777] [2020-11-22 12:48:33,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:33,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:48:33,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910872877] [2020-11-22 12:48:33,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:48:33,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:48:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:48:33,995 INFO L87 Difference]: Start difference. First operand 84 states and 176 transitions. Second operand 4 states. [2020-11-22 12:48:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:34,020 INFO L93 Difference]: Finished difference Result 97 states and 197 transitions. [2020-11-22 12:48:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:48:34,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-22 12:48:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:34,022 INFO L225 Difference]: With dead ends: 97 [2020-11-22 12:48:34,022 INFO L226 Difference]: Without dead ends: 36 [2020-11-22 12:48:34,022 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 [2020-11-22 12:48:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-22 12:48:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-22 12:48:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-22 12:48:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 56 transitions. [2020-11-22 12:48:34,026 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 56 transitions. Word has length 17 [2020-11-22 12:48:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:34,026 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 56 transitions. [2020-11-22 12:48:34,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:48:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 56 transitions. [2020-11-22 12:48:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:48:34,028 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:34,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:34,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:48:34,029 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:34,030 INFO L82 PathProgramCache]: Analyzing trace with hash 671694040, now seen corresponding path program 2 times [2020-11-22 12:48:34,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:34,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563995968] [2020-11-22 12:48:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:34,140 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 12:48:34,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563995968] [2020-11-22 12:48:34,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:34,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:48:34,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466036992] [2020-11-22 12:48:34,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:48:34,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:34,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:48:34,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:48:34,143 INFO L87 Difference]: Start difference. First operand 36 states and 56 transitions. Second operand 4 states. [2020-11-22 12:48:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:34,167 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2020-11-22 12:48:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:48:34,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-22 12:48:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:34,168 INFO L225 Difference]: With dead ends: 35 [2020-11-22 12:48:34,168 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:48:34,168 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 [2020-11-22 12:48:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:48:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:48:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:48:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:48:34,169 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-22 12:48:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:34,170 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:48:34,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:48:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:48:34,170 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:48:34,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:48:34,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:48:34 BasicIcfg [2020-11-22 12:48:34,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:48:34,177 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:48:34,177 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:48:34,178 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:48:34,178 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:28" (3/4) ... [2020-11-22 12:48:34,182 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:48:34,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 12:48:34,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 12:48:34,190 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-22 12:48:34,198 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 12:48:34,199 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:48:34,199 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:48:34,200 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:48:34,279 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a4c63ff1-e595-405d-9662-f8c358ed0b99/bin/utaipan/witness.graphml [2020-11-22 12:48:34,284 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:48:34,286 INFO L168 Benchmark]: Toolchain (without parser) took 7190.33 ms. Allocated memory was 136.3 MB in the beginning and 178.3 MB in the end (delta: 41.9 MB). Free memory was 102.2 MB in the beginning and 142.0 MB in the end (delta: -39.8 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:34,288 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 37.2 MB in the beginning and 37.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:48:34,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 796.92 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 90.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:34,289 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.40 ms. Allocated memory is still 136.3 MB. Free memory was 89.8 MB in the beginning and 88.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:34,289 INFO L168 Benchmark]: Boogie Preprocessor took 33.53 ms. Allocated memory is still 136.3 MB. Free memory was 88.3 MB in the beginning and 87.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:48:34,290 INFO L168 Benchmark]: RCFGBuilder took 736.01 ms. Allocated memory is still 136.3 MB. Free memory was 86.8 MB in the beginning and 64.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:34,290 INFO L168 Benchmark]: TraceAbstraction took 5438.07 ms. Allocated memory was 136.3 MB in the beginning and 178.3 MB in the end (delta: 41.9 MB). Free memory was 63.8 MB in the beginning and 145.2 MB in the end (delta: -81.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:48:34,292 INFO L168 Benchmark]: Witness Printer took 106.94 ms. Allocated memory is still 178.3 MB. Free memory was 145.2 MB in the beginning and 142.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:34,295 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 79.7 MB. Free memory was 37.2 MB in the beginning and 37.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 796.92 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 90.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.40 ms. Allocated memory is still 136.3 MB. Free memory was 89.8 MB in the beginning and 88.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.53 ms. Allocated memory is still 136.3 MB. Free memory was 88.3 MB in the beginning and 87.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 736.01 ms. Allocated memory is still 136.3 MB. Free memory was 86.8 MB in the beginning and 64.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5438.07 ms. Allocated memory was 136.3 MB in the beginning and 178.3 MB in the end (delta: 41.9 MB). Free memory was 63.8 MB in the beginning and 145.2 MB in the end (delta: -81.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 106.94 ms. Allocated memory is still 178.3 MB. Free memory was 145.2 MB in the beginning and 142.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1073 VarBasedMoverChecksPositive, 54 VarBasedMoverChecksNegative, 9 SemBasedMoverChecksPositive, 45 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.6s, 105 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.6s, 87 PlacesBefore, 31 PlacesAfterwards, 80 TransitionsBefore, 22 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 7 FixpointIterations, 19 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 77 TotalNumberOfCompositions, 3412 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, 78 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 136 SDtfs, 132 SDslu, 188 SDs, 0 SdLazy, 96 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 3089 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...