./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/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 58087887a1dd564559680784309457f518906cbf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:54:18,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:54:18,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:54:18,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:54:18,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:54:18,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:54:18,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:54:18,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:54:18,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:54:18,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:54:18,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:54:18,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:54:18,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:54:18,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:54:18,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:54:18,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:54:18,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:54:18,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:54:18,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:54:18,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:54:18,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:54:18,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:54:18,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:54:18,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:54:18,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:54:18,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:54:18,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:54:18,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:54:18,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:54:18,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:54:18,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:54:18,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:54:18,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:54:18,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:54:18,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:54:18,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:54:18,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:54:18,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:54:18,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:54:18,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:54:18,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:54:18,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:54:18,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:54:18,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:54:18,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:54:18,688 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:54:18,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:54:18,688 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:54:18,688 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:54:18,688 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:54:18,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:54:18,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:54:18,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:54:18,689 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:54:18,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:54:18,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:54:18,689 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:54:18,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:54:18,690 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:54:18,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:54:18,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:54:18,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:54:18,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:54:18,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:54:18,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:54:18,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:54:18,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:54:18,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:54:18,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:54:18,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:54:18,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:54:18,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:54:18,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:54:18,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:54:18,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:54:18,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:54:18,692 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:54:18,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:54:18,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:54:18,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:54:18,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:54:18,692 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_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58087887a1dd564559680784309457f518906cbf [2020-12-09 12:54:18,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:54:18,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:54:18,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:54:18,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:54:18,902 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:54:18,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2020-12-09 12:54:18,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/data/0af5788e7/1e988bab4fe84ac8bdf58a98b3d12f12/FLAG88dc29db1 [2020-12-09 12:54:19,373 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:54:19,374 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2020-12-09 12:54:19,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/data/0af5788e7/1e988bab4fe84ac8bdf58a98b3d12f12/FLAG88dc29db1 [2020-12-09 12:54:19,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/data/0af5788e7/1e988bab4fe84ac8bdf58a98b3d12f12 [2020-12-09 12:54:19,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:54:19,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:54:19,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:54:19,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:54:19,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:54:19,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e7afe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19, skipping insertion in model container [2020-12-09 12:54:19,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:54:19,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:54:19,557 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-12-09 12:54:19,638 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2020-12-09 12:54:19,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:54:19,650 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:54:19,661 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-12-09 12:54:19,679 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2020-12-09 12:54:19,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:54:19,732 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:54:19,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19 WrapperNode [2020-12-09 12:54:19,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:54:19,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:54:19,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:54:19,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:54:19,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:54:19,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:54:19,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:54:19,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:54:19,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... [2020-12-09 12:54:19,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:54:19,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:54:19,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:54:19,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:54:19,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/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 [2020-12-09 12:54:19,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 12:54:19,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 12:54:19,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 12:54:19,856 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-12-09 12:54:19,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-12-09 12:54:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:54:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 12:54:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:54:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 12:54:19,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:54:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:54:19,863 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-12-09 12:54:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-12-09 12:54:19,865 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-09 12:54:20,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:54:20,164 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 12:54:20,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:54:20 BoogieIcfgContainer [2020-12-09 12:54:20,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:54:20,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:54:20,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:54:20,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:54:20,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:54:19" (1/3) ... [2020-12-09 12:54:20,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a8f4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:54:20, skipping insertion in model container [2020-12-09 12:54:20,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:54:19" (2/3) ... [2020-12-09 12:54:20,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a8f4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:54:20, skipping insertion in model container [2020-12-09 12:54:20,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:54:20" (3/3) ... [2020-12-09 12:54:20,174 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2020-12-09 12:54:20,186 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 12:54:20,187 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:54:20,189 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 12:54:20,190 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 12:54:20,212 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,212 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,212 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,212 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,212 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,212 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,212 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,213 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,213 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,213 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,213 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,213 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,213 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,213 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,214 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,214 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,214 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,214 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,214 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,214 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,214 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,215 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,216 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,216 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,216 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,216 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,216 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,216 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,216 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,217 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,217 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,217 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,217 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,217 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,217 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,217 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,218 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,219 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,220 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,221 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,221 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,221 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,221 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,221 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,221 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,221 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,222 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,223 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,224 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,225 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,225 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,225 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,225 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,225 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,225 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,225 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,226 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,226 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,226 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,227 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,227 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,228 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,228 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,228 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,228 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,236 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,236 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,236 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,236 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,237 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,237 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,237 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,237 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,237 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,239 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,239 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,239 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,239 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,239 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,240 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,241 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,241 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,241 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,241 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,241 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,241 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,242 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,242 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,242 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 12:54:20,252 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2020-12-09 12:54:20,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-09 12:54:20,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:54:20,274 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:54:20,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:54:20,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:54:20,274 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:54:20,275 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:54:20,275 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:54:20,275 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:54:20,284 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 12:54:20,285 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 110 transitions, 288 flow [2020-12-09 12:54:20,287 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 110 transitions, 288 flow [2020-12-09 12:54:20,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 109 places, 110 transitions, 288 flow [2020-12-09 12:54:20,329 INFO L129 PetriNetUnfolder]: 19/144 cut-off events. [2020-12-09 12:54:20,329 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-12-09 12:54:20,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 144 events. 19/144 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 345 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 97. Up to 12 conditions per place. [2020-12-09 12:54:20,337 INFO L116 LiptonReduction]: Number of co-enabled transitions 2994 [2020-12-09 12:54:22,774 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-12-09 12:54:22,921 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-12-09 12:54:23,286 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-12-09 12:54:23,447 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-12-09 12:54:23,544 INFO L131 LiptonReduction]: Checked pairs total: 27193 [2020-12-09 12:54:23,544 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-12-09 12:54:23,548 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 60 transitions, 188 flow [2020-12-09 12:54:23,899 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6574 states. [2020-12-09 12:54:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states. [2020-12-09 12:54:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 12:54:23,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:23,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:23,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash 215866751, now seen corresponding path program 1 times [2020-12-09 12:54:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:23,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729248484] [2020-12-09 12:54:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:24,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729248484] [2020-12-09 12:54:24,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:24,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:54:24,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817139686] [2020-12-09 12:54:24,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:54:24,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:54:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:54:24,064 INFO L87 Difference]: Start difference. First operand 6574 states. Second operand 5 states. [2020-12-09 12:54:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:24,348 INFO L93 Difference]: Finished difference Result 14569 states and 50345 transitions. [2020-12-09 12:54:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 12:54:24,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 12:54:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:24,443 INFO L225 Difference]: With dead ends: 14569 [2020-12-09 12:54:24,443 INFO L226 Difference]: Without dead ends: 10609 [2020-12-09 12:54:24,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 12:54:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2020-12-09 12:54:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 6772. [2020-12-09 12:54:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6772 states. [2020-12-09 12:54:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 23787 transitions. [2020-12-09 12:54:24,838 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 23787 transitions. Word has length 9 [2020-12-09 12:54:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:24,839 INFO L481 AbstractCegarLoop]: Abstraction has 6772 states and 23787 transitions. [2020-12-09 12:54:24,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:54:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 23787 transitions. [2020-12-09 12:54:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:54:24,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:24,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:24,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:54:24,841 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1284519412, now seen corresponding path program 1 times [2020-12-09 12:54:24,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:24,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471990444] [2020-12-09 12:54:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:24,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471990444] [2020-12-09 12:54:24,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:24,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:54:24,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109101830] [2020-12-09 12:54:24,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:54:24,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:24,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:54:24,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:54:24,903 INFO L87 Difference]: Start difference. First operand 6772 states and 23787 transitions. Second operand 3 states. [2020-12-09 12:54:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:25,031 INFO L93 Difference]: Finished difference Result 5796 states and 18185 transitions. [2020-12-09 12:54:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:54:25,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 12:54:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:25,101 INFO L225 Difference]: With dead ends: 5796 [2020-12-09 12:54:25,101 INFO L226 Difference]: Without dead ends: 5754 [2020-12-09 12:54:25,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:54:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5754 states. [2020-12-09 12:54:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5754 to 5754. [2020-12-09 12:54:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-12-09 12:54:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 18075 transitions. [2020-12-09 12:54:25,271 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 18075 transitions. Word has length 11 [2020-12-09 12:54:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:25,271 INFO L481 AbstractCegarLoop]: Abstraction has 5754 states and 18075 transitions. [2020-12-09 12:54:25,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:54:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 18075 transitions. [2020-12-09 12:54:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:54:25,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:25,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:25,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 12:54:25,273 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash -486298774, now seen corresponding path program 2 times [2020-12-09 12:54:25,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:25,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107306853] [2020-12-09 12:54:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:25,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107306853] [2020-12-09 12:54:25,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:25,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:54:25,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301982417] [2020-12-09 12:54:25,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:54:25,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:25,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:54:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:54:25,330 INFO L87 Difference]: Start difference. First operand 5754 states and 18075 transitions. Second operand 4 states. [2020-12-09 12:54:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:25,379 INFO L93 Difference]: Finished difference Result 3889 states and 9837 transitions. [2020-12-09 12:54:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:54:25,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 12:54:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:25,387 INFO L225 Difference]: With dead ends: 3889 [2020-12-09 12:54:25,388 INFO L226 Difference]: Without dead ends: 3759 [2020-12-09 12:54:25,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:54:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2020-12-09 12:54:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3171. [2020-12-09 12:54:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3171 states. [2020-12-09 12:54:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 8234 transitions. [2020-12-09 12:54:25,493 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 8234 transitions. Word has length 11 [2020-12-09 12:54:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:25,493 INFO L481 AbstractCegarLoop]: Abstraction has 3171 states and 8234 transitions. [2020-12-09 12:54:25,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:54:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 8234 transitions. [2020-12-09 12:54:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 12:54:25,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:25,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:25,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 12:54:25,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:25,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1170749041, now seen corresponding path program 1 times [2020-12-09 12:54:25,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:25,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069513259] [2020-12-09 12:54:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:25,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069513259] [2020-12-09 12:54:25,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:25,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:54:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062619823] [2020-12-09 12:54:25,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:54:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:54:25,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:54:25,535 INFO L87 Difference]: Start difference. First operand 3171 states and 8234 transitions. Second operand 5 states. [2020-12-09 12:54:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:25,643 INFO L93 Difference]: Finished difference Result 4389 states and 11053 transitions. [2020-12-09 12:54:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 12:54:25,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 12:54:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:25,654 INFO L225 Difference]: With dead ends: 4389 [2020-12-09 12:54:25,654 INFO L226 Difference]: Without dead ends: 3713 [2020-12-09 12:54:25,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 12:54:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2020-12-09 12:54:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2879. [2020-12-09 12:54:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2879 states. [2020-12-09 12:54:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 7415 transitions. [2020-12-09 12:54:25,741 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 7415 transitions. Word has length 13 [2020-12-09 12:54:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:25,742 INFO L481 AbstractCegarLoop]: Abstraction has 2879 states and 7415 transitions. [2020-12-09 12:54:25,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:54:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 7415 transitions. [2020-12-09 12:54:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 12:54:25,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:25,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:25,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 12:54:25,744 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:25,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1338205501, now seen corresponding path program 1 times [2020-12-09 12:54:25,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:25,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105589508] [2020-12-09 12:54:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:25,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105589508] [2020-12-09 12:54:25,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:25,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:54:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429576029] [2020-12-09 12:54:25,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:54:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:54:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:54:25,778 INFO L87 Difference]: Start difference. First operand 2879 states and 7415 transitions. Second operand 5 states. [2020-12-09 12:54:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:25,861 INFO L93 Difference]: Finished difference Result 3539 states and 8886 transitions. [2020-12-09 12:54:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:54:25,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-09 12:54:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:25,870 INFO L225 Difference]: With dead ends: 3539 [2020-12-09 12:54:25,870 INFO L226 Difference]: Without dead ends: 3372 [2020-12-09 12:54:25,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:54:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2020-12-09 12:54:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 2537. [2020-12-09 12:54:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2537 states. [2020-12-09 12:54:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 6499 transitions. [2020-12-09 12:54:25,924 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 6499 transitions. Word has length 16 [2020-12-09 12:54:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:25,924 INFO L481 AbstractCegarLoop]: Abstraction has 2537 states and 6499 transitions. [2020-12-09 12:54:25,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:54:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 6499 transitions. [2020-12-09 12:54:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 12:54:25,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:25,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:25,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 12:54:25,925 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1337772589, now seen corresponding path program 1 times [2020-12-09 12:54:25,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:25,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422284943] [2020-12-09 12:54:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:25,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422284943] [2020-12-09 12:54:25,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:25,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 12:54:25,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277388112] [2020-12-09 12:54:25,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:54:25,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:25,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:54:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:54:25,960 INFO L87 Difference]: Start difference. First operand 2537 states and 6499 transitions. Second operand 5 states. [2020-12-09 12:54:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:26,044 INFO L93 Difference]: Finished difference Result 3091 states and 7769 transitions. [2020-12-09 12:54:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:54:26,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-09 12:54:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:26,049 INFO L225 Difference]: With dead ends: 3091 [2020-12-09 12:54:26,049 INFO L226 Difference]: Without dead ends: 2789 [2020-12-09 12:54:26,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:54:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2020-12-09 12:54:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2048. [2020-12-09 12:54:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2048 states. [2020-12-09 12:54:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5239 transitions. [2020-12-09 12:54:26,085 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5239 transitions. Word has length 16 [2020-12-09 12:54:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:26,085 INFO L481 AbstractCegarLoop]: Abstraction has 2048 states and 5239 transitions. [2020-12-09 12:54:26,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:54:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5239 transitions. [2020-12-09 12:54:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 12:54:26,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:26,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:26,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 12:54:26,087 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:26,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1459028037, now seen corresponding path program 1 times [2020-12-09 12:54:26,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:26,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880380895] [2020-12-09 12:54:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:26,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880380895] [2020-12-09 12:54:26,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:26,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 12:54:26,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722713366] [2020-12-09 12:54:26,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:54:26,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:54:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:54:26,133 INFO L87 Difference]: Start difference. First operand 2048 states and 5239 transitions. Second operand 6 states. [2020-12-09 12:54:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:26,189 INFO L93 Difference]: Finished difference Result 2380 states and 6028 transitions. [2020-12-09 12:54:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:54:26,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-09 12:54:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:26,193 INFO L225 Difference]: With dead ends: 2380 [2020-12-09 12:54:26,194 INFO L226 Difference]: Without dead ends: 2176 [2020-12-09 12:54:26,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:54:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2020-12-09 12:54:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2000. [2020-12-09 12:54:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2000 states. [2020-12-09 12:54:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 5059 transitions. [2020-12-09 12:54:26,226 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 5059 transitions. Word has length 22 [2020-12-09 12:54:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:26,226 INFO L481 AbstractCegarLoop]: Abstraction has 2000 states and 5059 transitions. [2020-12-09 12:54:26,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:54:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 5059 transitions. [2020-12-09 12:54:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 12:54:26,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:26,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:26,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 12:54:26,229 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash -893703140, now seen corresponding path program 1 times [2020-12-09 12:54:26,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:26,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526108000] [2020-12-09 12:54:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:54:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:54:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526108000] [2020-12-09 12:54:26,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:54:26,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 12:54:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797105138] [2020-12-09 12:54:26,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:54:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:54:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:54:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 12:54:26,271 INFO L87 Difference]: Start difference. First operand 2000 states and 5059 transitions. Second operand 6 states. [2020-12-09 12:54:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:54:26,330 INFO L93 Difference]: Finished difference Result 2332 states and 5848 transitions. [2020-12-09 12:54:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:54:26,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-09 12:54:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:54:26,333 INFO L225 Difference]: With dead ends: 2332 [2020-12-09 12:54:26,333 INFO L226 Difference]: Without dead ends: 1936 [2020-12-09 12:54:26,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 12:54:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-12-09 12:54:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1760. [2020-12-09 12:54:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1760 states. [2020-12-09 12:54:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 4351 transitions. [2020-12-09 12:54:26,362 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 4351 transitions. Word has length 22 [2020-12-09 12:54:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:54:26,362 INFO L481 AbstractCegarLoop]: Abstraction has 1760 states and 4351 transitions. [2020-12-09 12:54:26,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:54:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 4351 transitions. [2020-12-09 12:54:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 12:54:26,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:54:26,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:54:26,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 12:54:26,364 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-12-09 12:54:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:54:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash 944960700, now seen corresponding path program 2 times [2020-12-09 12:54:26,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:54:26,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813475671] [2020-12-09 12:54:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:54:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:54:26,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:54:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:54:26,392 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:54:26,417 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:54:26,417 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:54:26,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 12:54:26,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:54:26 BasicIcfg [2020-12-09 12:54:26,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:54:26,459 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:54:26,459 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:54:26,459 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:54:26,460 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:54:20" (3/4) ... [2020-12-09 12:54:26,462 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 12:54:26,516 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a4841f3b-6553-4e9c-bd36-7834edb5ff7c/bin/utaipan/witness.graphml [2020-12-09 12:54:26,516 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:54:26,517 INFO L168 Benchmark]: Toolchain (without parser) took 7121.14 ms. Allocated memory was 100.7 MB in the beginning and 327.2 MB in the end (delta: 226.5 MB). Free memory was 59.0 MB in the beginning and 161.8 MB in the end (delta: -102.7 MB). Peak memory consumption was 125.4 MB. Max. memory is 16.1 GB. [2020-12-09 12:54:26,517 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 100.7 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:54:26,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.65 ms. Allocated memory is still 100.7 MB. Free memory was 58.9 MB in the beginning and 53.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-12-09 12:54:26,518 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.16 ms. Allocated memory is still 100.7 MB. Free memory was 53.7 MB in the beginning and 51.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:54:26,518 INFO L168 Benchmark]: Boogie Preprocessor took 18.22 ms. Allocated memory is still 100.7 MB. Free memory was 51.7 MB in the beginning and 50.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:54:26,519 INFO L168 Benchmark]: RCFGBuilder took 383.26 ms. Allocated memory is still 100.7 MB. Free memory was 50.3 MB in the beginning and 51.6 MB in the end (delta: -1.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:54:26,519 INFO L168 Benchmark]: TraceAbstraction took 6290.92 ms. Allocated memory was 100.7 MB in the beginning and 327.2 MB in the end (delta: 226.5 MB). Free memory was 51.0 MB in the beginning and 170.1 MB in the end (delta: -119.2 MB). Peak memory consumption was 109.9 MB. Max. memory is 16.1 GB. [2020-12-09 12:54:26,519 INFO L168 Benchmark]: Witness Printer took 57.09 ms. Allocated memory is still 327.2 MB. Free memory was 170.1 MB in the beginning and 161.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:54:26,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 100.7 MB. Free memory is still 76.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.65 ms. Allocated memory is still 100.7 MB. Free memory was 58.9 MB in the beginning and 53.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.16 ms. Allocated memory is still 100.7 MB. Free memory was 53.7 MB in the beginning and 51.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.22 ms. Allocated memory is still 100.7 MB. Free memory was 51.7 MB in the beginning and 50.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 383.26 ms. Allocated memory is still 100.7 MB. Free memory was 50.3 MB in the beginning and 51.6 MB in the end (delta: -1.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6290.92 ms. Allocated memory was 100.7 MB in the beginning and 327.2 MB in the end (delta: 226.5 MB). Free memory was 51.0 MB in the beginning and 170.1 MB in the end (delta: -119.2 MB). Peak memory consumption was 109.9 MB. Max. memory is 16.1 GB. * Witness Printer took 57.09 ms. Allocated memory is still 327.2 MB. Free memory was 170.1 MB in the beginning and 161.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2440 VarBasedMoverChecksPositive, 86 VarBasedMoverChecksNegative, 27 SemBasedMoverChecksPositive, 59 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.4s, 974 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.2s, 109 PlacesBefore, 60 PlacesAfterwards, 110 TransitionsBefore, 60 TransitionsAfterwards, 2994 CoEnabledTransitionPairs, 9 FixpointIterations, 27 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 63 TotalNumberOfCompositions, 27193 MoverChecksTotal - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L727] 2 l = x VAL [r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [r=2, w=0, x=0, y=0] [L730] 4 y = l VAL [r=2, w=0, x=0, y=0] [L733] 4 int ly = y; VAL [r=2, w=0, x=0, y=0] [L743] 2 r = l [L745] 2 return 0; [L714] CALL 3 __VERIFIER_atomic_take_write_lock() [L706] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 3 !(!cond) [L706] RET 3 assume_abort_if_not(w==0 && r==0) [L707] 3 w = 1 [L714] RET 3 __VERIFIER_atomic_take_write_lock() [L716] 3 x = 3 VAL [r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 823 SDtfs, 945 SDslu, 1332 SDs, 0 SdLazy, 471 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6772occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 8 MinimizatonAttempts, 7187 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 3832 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 incorrect! Received shutdown request...