./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF --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 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:49:09,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:49:09,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:49:09,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:49:09,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:49:09,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:49:09,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:49:09,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:49:09,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:49:09,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:49:09,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:49:09,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:49:09,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:49:09,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:49:09,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:49:09,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:49:09,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:49:09,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:49:09,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:49:09,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:49:09,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:49:09,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:49:09,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:49:09,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:49:09,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:49:09,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:49:09,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:49:09,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:49:09,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:49:09,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:49:09,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:49:09,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:49:09,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:49:09,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:49:09,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:49:09,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:49:09,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:49:09,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:49:09,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:49:09,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:49:09,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:49:09,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:49:09,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:49:09,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:49:09,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:49:09,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:49:09,181 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:49:09,181 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:49:09,182 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:49:09,182 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:49:09,182 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:49:09,182 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:49:09,182 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:49:09,183 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:49:09,183 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:49:09,183 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:49:09,183 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:49:09,183 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:49:09,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:49:09,184 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:49:09,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:49:09,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:49:09,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:49:09,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:49:09,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:49:09,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:49:09,186 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:49:09,186 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:49:09,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:49:09,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:49:09,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:49:09,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:49:09,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:49:09,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:49:09,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:49:09,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:49:09,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:49:09,193 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:49:09,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:49:09,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:49:09,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:49:09,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:49:09,194 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_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2021-11-12 23:49:09,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:49:09,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:49:09,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:49:09,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:49:09,506 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:49:09,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2021-11-12 23:49:09,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/data/a97b7882d/4dcbdf2738094b838fd800235e6b180a/FLAG8e0a892f3 [2021-11-12 23:49:10,256 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:49:10,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2021-11-12 23:49:10,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/data/a97b7882d/4dcbdf2738094b838fd800235e6b180a/FLAG8e0a892f3 [2021-11-12 23:49:10,511 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/data/a97b7882d/4dcbdf2738094b838fd800235e6b180a [2021-11-12 23:49:10,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:49:10,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:49:10,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:49:10,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:49:10,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:49:10,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:49:10" (1/1) ... [2021-11-12 23:49:10,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b5ae4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:10, skipping insertion in model container [2021-11-12 23:49:10,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:49:10" (1/1) ... [2021-11-12 23:49:10,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:49:10,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:49:10,819 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-11-12 23:49:11,063 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2021-11-12 23:49:11,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:49:11,098 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:49:11,132 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-11-12 23:49:11,153 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2021-11-12 23:49:11,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:49:11,217 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:49:11,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11 WrapperNode [2021-11-12 23:49:11,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:49:11,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:49:11,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:49:11,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:49:11,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:49:11,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:49:11,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:49:11,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:49:11,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:49:11,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:49:11,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:49:11,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:49:11,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (1/1) ... [2021-11-12 23:49:11,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:49:11,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:49:11,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:49:11,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:49:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 23:49:11,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-12 23:49:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-12 23:49:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2021-11-12 23:49:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2021-11-12 23:49:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:49:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:49:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:49:11,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-12 23:49:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:49:11,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:49:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2021-11-12 23:49:11,420 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2021-11-12 23:49:11,423 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-12 23:49:11,925 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:49:11,929 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:49:11,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:49:11 BoogieIcfgContainer [2021-11-12 23:49:11,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:49:11,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:49:11,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:49:11,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:49:11,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:49:10" (1/3) ... [2021-11-12 23:49:11,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd2ad43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:49:11, skipping insertion in model container [2021-11-12 23:49:11,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:49:11" (2/3) ... [2021-11-12 23:49:11,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd2ad43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:49:11, skipping insertion in model container [2021-11-12 23:49:11,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:49:11" (3/3) ... [2021-11-12 23:49:11,946 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2021-11-12 23:49:11,952 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-12 23:49:11,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:49:11,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:49:11,953 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-12 23:49:12,013 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,013 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,014 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,014 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,015 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,015 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,016 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,016 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,016 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,017 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,017 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,017 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,018 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,018 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,019 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,019 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,020 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,020 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,021 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,021 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,021 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,022 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,022 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,022 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,023 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,023 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,023 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,023 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,024 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,024 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,024 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,024 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,025 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,025 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,025 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,026 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,026 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,026 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,027 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,027 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,027 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,027 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,028 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,028 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,028 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,029 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,029 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,029 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,029 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,030 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,030 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,030 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,030 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,031 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,031 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,031 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,031 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,032 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,032 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,033 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,033 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,033 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,033 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,034 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,034 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,036 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,036 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,037 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,037 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,037 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,037 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,038 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,038 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,038 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,038 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,039 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,040 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,040 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,043 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,043 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,044 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,044 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,044 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,045 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,046 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,046 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,046 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,052 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,052 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,052 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,053 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,053 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,056 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,057 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,057 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,058 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,058 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,058 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,059 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,059 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,059 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,059 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,060 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,060 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,060 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,060 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,060 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,061 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,069 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,070 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,070 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,070 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,070 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,071 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,071 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,071 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,071 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,073 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,073 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,073 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,074 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,074 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,074 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,077 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,077 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,077 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,078 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,078 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,078 WARN L322 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,079 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,080 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,080 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,080 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~ly~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,080 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,081 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,081 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_~lx~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,081 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,081 WARN L322 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-12 23:49:12,091 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-12 23:49:12,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:49:12,173 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:49:12,173 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-12 23:49:12,193 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-12 23:49:12,209 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 114 transitions, 260 flow [2021-11-12 23:49:12,212 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 114 transitions, 260 flow [2021-11-12 23:49:12,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 114 transitions, 260 flow [2021-11-12 23:49:12,283 INFO L129 PetriNetUnfolder]: 2/110 cut-off events. [2021-11-12 23:49:12,284 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-12 23:49:12,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 110 events. 2/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2021-11-12 23:49:12,300 INFO L116 LiptonReduction]: Number of co-enabled transitions 2574 [2021-11-12 23:49:16,792 INFO L131 LiptonReduction]: Checked pairs total: 11659 [2021-11-12 23:49:16,793 INFO L133 LiptonReduction]: Total number of compositions: 82 [2021-11-12 23:49:16,802 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 44 transitions, 120 flow [2021-11-12 23:49:16,981 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3310 states, 3307 states have (on average 3.7084971273057152) internal successors, (12264), 3309 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 3310 states, 3307 states have (on average 3.7084971273057152) internal successors, (12264), 3309 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:49:17,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:17,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:17,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1670128176, now seen corresponding path program 1 times [2021-11-12 23:49:17,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:17,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831100521] [2021-11-12 23:49:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:17,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:17,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:17,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831100521] [2021-11-12 23:49:17,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831100521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:17,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:17,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:49:17,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435559801] [2021-11-12 23:49:17,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:17,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:49:17,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:49:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:49:17,299 INFO L87 Difference]: Start difference. First operand has 3310 states, 3307 states have (on average 3.7084971273057152) internal successors, (12264), 3309 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:17,825 INFO L93 Difference]: Finished difference Result 6742 states and 23590 transitions. [2021-11-12 23:49:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:49:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-12 23:49:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:17,997 INFO L225 Difference]: With dead ends: 6742 [2021-11-12 23:49:17,997 INFO L226 Difference]: Without dead ends: 6526 [2021-11-12 23:49:17,998 INFO L932 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 [2021-11-12 23:49:18,002 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 138 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.50ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:18,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 34 Invalid, 276 Unknown, 0 Unchecked, 19.50ms Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 266.56ms Time] [2021-11-12 23:49:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-11-12 23:49:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 4138. [2021-11-12 23:49:18,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4135 states have (on average 3.6135429262394196) internal successors, (14942), 4137 states have internal predecessors, (14942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 14942 transitions. [2021-11-12 23:49:18,384 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 14942 transitions. Word has length 9 [2021-11-12 23:49:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:18,385 INFO L470 AbstractCegarLoop]: Abstraction has 4138 states and 14942 transitions. [2021-11-12 23:49:18,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 14942 transitions. [2021-11-12 23:49:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:49:18,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:18,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:18,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:49:18,389 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash -888360678, now seen corresponding path program 1 times [2021-11-12 23:49:18,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:18,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706393889] [2021-11-12 23:49:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:18,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:18,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:18,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706393889] [2021-11-12 23:49:18,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706393889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:18,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:18,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:49:18,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708281596] [2021-11-12 23:49:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:18,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:49:18,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:49:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:49:18,587 INFO L87 Difference]: Start difference. First operand 4138 states and 14942 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:18,713 INFO L93 Difference]: Finished difference Result 3324 states and 10329 transitions. [2021-11-12 23:49:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:49:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-12 23:49:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:18,749 INFO L225 Difference]: With dead ends: 3324 [2021-11-12 23:49:18,750 INFO L226 Difference]: Without dead ends: 3306 [2021-11-12 23:49:18,750 INFO L932 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 [2021-11-12 23:49:18,752 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:18,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 26 Invalid, 72 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 73.17ms Time] [2021-11-12 23:49:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-11-12 23:49:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 3306. [2021-11-12 23:49:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3303 states have (on average 3.112624886466848) internal successors, (10281), 3305 states have internal predecessors, (10281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 10281 transitions. [2021-11-12 23:49:18,985 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 10281 transitions. Word has length 11 [2021-11-12 23:49:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:18,985 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 10281 transitions. [2021-11-12 23:49:18,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 10281 transitions. [2021-11-12 23:49:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:49:18,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:18,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:18,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:49:18,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 593358864, now seen corresponding path program 2 times [2021-11-12 23:49:18,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:18,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791877989] [2021-11-12 23:49:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:19,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:19,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:19,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791877989] [2021-11-12 23:49:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791877989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:19,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:19,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:49:19,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536004559] [2021-11-12 23:49:19,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:19,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:49:19,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:49:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:49:19,099 INFO L87 Difference]: Start difference. First operand 3306 states and 10281 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:19,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:19,295 INFO L93 Difference]: Finished difference Result 3786 states and 11317 transitions. [2021-11-12 23:49:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:49:19,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-12 23:49:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:19,341 INFO L225 Difference]: With dead ends: 3786 [2021-11-12 23:49:19,341 INFO L226 Difference]: Without dead ends: 3748 [2021-11-12 23:49:19,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:49:19,346 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.07ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:19,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 134 Unknown, 0 Unchecked, 4.07ms Time], IncrementalHoareTripleChecker [10 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 144.30ms Time] [2021-11-12 23:49:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-12 23:49:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 2804. [2021-11-12 23:49:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2799 states have (on average 3.0986066452304395) internal successors, (8673), 2803 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 8673 transitions. [2021-11-12 23:49:19,513 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 8673 transitions. Word has length 11 [2021-11-12 23:49:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:19,514 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 8673 transitions. [2021-11-12 23:49:19,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 8673 transitions. [2021-11-12 23:49:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:49:19,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:19,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:19,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:49:19,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1710811770, now seen corresponding path program 1 times [2021-11-12 23:49:19,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:19,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995162721] [2021-11-12 23:49:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:19,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:19,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:19,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995162721] [2021-11-12 23:49:19,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995162721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:19,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:19,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:49:19,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575853275] [2021-11-12 23:49:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:19,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:49:19,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:49:19,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:49:19,565 INFO L87 Difference]: Start difference. First operand 2804 states and 8673 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:19,834 INFO L93 Difference]: Finished difference Result 5628 states and 17342 transitions. [2021-11-12 23:49:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:49:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 23:49:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:19,915 INFO L225 Difference]: With dead ends: 5628 [2021-11-12 23:49:19,916 INFO L226 Difference]: Without dead ends: 5246 [2021-11-12 23:49:19,917 INFO L932 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 [2021-11-12 23:49:19,918 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:19,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 37 Invalid, 278 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 197.05ms Time] [2021-11-12 23:49:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5246 states. [2021-11-12 23:49:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5246 to 3334. [2021-11-12 23:49:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3331 states have (on average 3.1657160012008405) internal successors, (10545), 3333 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 10545 transitions. [2021-11-12 23:49:20,104 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 10545 transitions. Word has length 13 [2021-11-12 23:49:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:20,105 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 10545 transitions. [2021-11-12 23:49:20,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 10545 transitions. [2021-11-12 23:49:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 23:49:20,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:20,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:20,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:49:20,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 792522599, now seen corresponding path program 1 times [2021-11-12 23:49:20,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:20,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694566330] [2021-11-12 23:49:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:20,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:20,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:20,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694566330] [2021-11-12 23:49:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694566330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:20,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:49:20,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730525354] [2021-11-12 23:49:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:20,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:49:20,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:20,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:49:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:49:20,178 INFO L87 Difference]: Start difference. First operand 3334 states and 10545 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:20,332 INFO L93 Difference]: Finished difference Result 1466 states and 3441 transitions. [2021-11-12 23:49:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:49:20,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 23:49:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:20,337 INFO L225 Difference]: With dead ends: 1466 [2021-11-12 23:49:20,338 INFO L226 Difference]: Without dead ends: 1466 [2021-11-12 23:49:20,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:49:20,339 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:20,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 40 Invalid, 131 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 130.82ms Time] [2021-11-12 23:49:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-11-12 23:49:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1332. [2021-11-12 23:49:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1330 states have (on average 2.367669172932331) internal successors, (3149), 1331 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 3149 transitions. [2021-11-12 23:49:20,383 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 3149 transitions. Word has length 16 [2021-11-12 23:49:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:20,383 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 3149 transitions. [2021-11-12 23:49:20,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 3149 transitions. [2021-11-12 23:49:20,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 23:49:20,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:20,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:20,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:49:20,385 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash -710447766, now seen corresponding path program 1 times [2021-11-12 23:49:20,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:20,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348953107] [2021-11-12 23:49:20,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:20,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:20,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348953107] [2021-11-12 23:49:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348953107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:20,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:20,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:49:20,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095594315] [2021-11-12 23:49:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:49:20,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:49:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:49:20,430 INFO L87 Difference]: Start difference. First operand 1332 states and 3149 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:20,652 INFO L93 Difference]: Finished difference Result 1534 states and 3532 transitions. [2021-11-12 23:49:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:49:20,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 23:49:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:20,657 INFO L225 Difference]: With dead ends: 1534 [2021-11-12 23:49:20,657 INFO L226 Difference]: Without dead ends: 1474 [2021-11-12 23:49:20,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:49:20,658 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:20,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 27 Invalid, 268 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [3 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 182.10ms Time] [2021-11-12 23:49:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-11-12 23:49:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1166. [2021-11-12 23:49:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1164 states have (on average 2.3539518900343643) internal successors, (2740), 1165 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2740 transitions. [2021-11-12 23:49:20,697 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2740 transitions. Word has length 16 [2021-11-12 23:49:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:20,697 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2740 transitions. [2021-11-12 23:49:20,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2740 transitions. [2021-11-12 23:49:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 23:49:20,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:20,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:20,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:49:20,700 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:20,700 INFO L85 PathProgramCache]: Analyzing trace with hash -710880678, now seen corresponding path program 1 times [2021-11-12 23:49:20,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:20,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644564282] [2021-11-12 23:49:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:20,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:20,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:20,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644564282] [2021-11-12 23:49:20,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644564282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:20,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:20,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:49:20,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527139008] [2021-11-12 23:49:20,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:20,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:49:20,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:49:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:49:20,740 INFO L87 Difference]: Start difference. First operand 1166 states and 2740 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:20,979 INFO L93 Difference]: Finished difference Result 1358 states and 3134 transitions. [2021-11-12 23:49:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:49:20,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 23:49:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:20,984 INFO L225 Difference]: With dead ends: 1358 [2021-11-12 23:49:20,984 INFO L226 Difference]: Without dead ends: 1242 [2021-11-12 23:49:20,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:49:20,985 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 163.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:20,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 27 Invalid, 264 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 199.46ms Time] [2021-11-12 23:49:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-11-12 23:49:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 928. [2021-11-12 23:49:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 926 states have (on average 2.3488120950323976) internal successors, (2175), 927 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2175 transitions. [2021-11-12 23:49:21,017 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2175 transitions. Word has length 16 [2021-11-12 23:49:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:21,018 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 2175 transitions. [2021-11-12 23:49:21,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2175 transitions. [2021-11-12 23:49:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:49:21,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:21,021 INFO L514 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] [2021-11-12 23:49:21,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:49:21,021 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:21,022 INFO L85 PathProgramCache]: Analyzing trace with hash -141776782, now seen corresponding path program 1 times [2021-11-12 23:49:21,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:21,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764279233] [2021-11-12 23:49:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:21,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:21,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:21,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764279233] [2021-11-12 23:49:21,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764279233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:21,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:21,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:49:21,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975041835] [2021-11-12 23:49:21,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:21,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:49:21,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:49:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:49:21,110 INFO L87 Difference]: Start difference. First operand 928 states and 2175 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:21,257 INFO L93 Difference]: Finished difference Result 1048 states and 2433 transitions. [2021-11-12 23:49:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:49:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 23:49:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:21,261 INFO L225 Difference]: With dead ends: 1048 [2021-11-12 23:49:21,261 INFO L226 Difference]: Without dead ends: 952 [2021-11-12 23:49:21,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:49:21,264 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:21,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 83 Invalid, 216 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [7 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 125.35ms Time] [2021-11-12 23:49:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-11-12 23:49:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 896. [2021-11-12 23:49:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 894 states have (on average 2.3031319910514543) internal successors, (2059), 895 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2059 transitions. [2021-11-12 23:49:21,291 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2059 transitions. Word has length 22 [2021-11-12 23:49:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:21,291 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2059 transitions. [2021-11-12 23:49:21,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2059 transitions. [2021-11-12 23:49:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:49:21,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:21,294 INFO L514 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] [2021-11-12 23:49:21,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:49:21,294 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:21,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1604001975, now seen corresponding path program 1 times [2021-11-12 23:49:21,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:21,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908751605] [2021-11-12 23:49:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:21,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:49:21,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:49:21,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908751605] [2021-11-12 23:49:21,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908751605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:49:21,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:49:21,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:49:21,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905902206] [2021-11-12 23:49:21,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:21,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:49:21,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:49:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:49:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:49:21,399 INFO L87 Difference]: Start difference. First operand 896 states and 2059 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:21,592 INFO L93 Difference]: Finished difference Result 1024 states and 2331 transitions. [2021-11-12 23:49:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:49:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-12 23:49:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:21,595 INFO L225 Difference]: With dead ends: 1024 [2021-11-12 23:49:21,595 INFO L226 Difference]: Without dead ends: 792 [2021-11-12 23:49:21,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:49:21,596 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:21,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 89 Invalid, 270 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [15 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 158.24ms Time] [2021-11-12 23:49:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-11-12 23:49:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 736. [2021-11-12 23:49:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 734 states have (on average 2.189373297002725) internal successors, (1607), 735 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1607 transitions. [2021-11-12 23:49:21,628 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1607 transitions. Word has length 22 [2021-11-12 23:49:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1607 transitions. [2021-11-12 23:49:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:49:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1607 transitions. [2021-11-12 23:49:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 23:49:21,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:21,631 INFO L514 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] [2021-11-12 23:49:21,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:49:21,631 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-11-12 23:49:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1497989347, now seen corresponding path program 2 times [2021-11-12 23:49:21,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:49:21,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212086858] [2021-11-12 23:49:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:21,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:49:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:49:21,648 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:49:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:49:21,696 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:49:21,697 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:49:21,698 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2021-11-12 23:49:21,699 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2021-11-12 23:49:21,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (4 of 7 remaining) [2021-11-12 23:49:21,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (3 of 7 remaining) [2021-11-12 23:49:21,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION (2 of 7 remaining) [2021-11-12 23:49:21,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION (1 of 7 remaining) [2021-11-12 23:49:21,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2021-11-12 23:49:21,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:49:21,704 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-12 23:49:21,709 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-12 23:49:21,709 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:49:21,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:49:21 BasicIcfg [2021-11-12 23:49:21,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:49:21,782 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:49:21,782 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:49:21,782 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:49:21,783 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:49:11" (3/4) ... [2021-11-12 23:49:21,784 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-12 23:49:21,881 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:49:21,881 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:49:21,882 INFO L158 Benchmark]: Toolchain (without parser) took 11365.85ms. Allocated memory was 130.0MB in the beginning and 276.8MB in the end (delta: 146.8MB). Free memory was 94.8MB in the beginning and 152.3MB in the end (delta: -57.5MB). Peak memory consumption was 88.5MB. Max. memory is 16.1GB. [2021-11-12 23:49:21,882 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:49:21,882 INFO L158 Benchmark]: CACSL2BoogieTranslator took 701.15ms. Allocated memory is still 130.0MB. Free memory was 94.8MB in the beginning and 96.3MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:49:21,883 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.50ms. Allocated memory is still 130.0MB. Free memory was 96.3MB in the beginning and 94.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:49:21,883 INFO L158 Benchmark]: Boogie Preprocessor took 27.38ms. Allocated memory is still 130.0MB. Free memory was 94.2MB in the beginning and 92.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:49:21,884 INFO L158 Benchmark]: RCFGBuilder took 611.60ms. Allocated memory is still 130.0MB. Free memory was 92.8MB in the beginning and 78.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:49:21,884 INFO L158 Benchmark]: TraceAbstraction took 9844.67ms. Allocated memory was 130.0MB in the beginning and 276.8MB in the end (delta: 146.8MB). Free memory was 78.1MB in the beginning and 160.7MB in the end (delta: -82.6MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. [2021-11-12 23:49:21,885 INFO L158 Benchmark]: Witness Printer took 99.44ms. Allocated memory is still 276.8MB. Free memory was 160.7MB in the beginning and 152.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:49:21,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 92.3MB. Free memory was 50.4MB in the beginning and 50.3MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 701.15ms. Allocated memory is still 130.0MB. Free memory was 94.8MB in the beginning and 96.3MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.50ms. Allocated memory is still 130.0MB. Free memory was 96.3MB in the beginning and 94.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.38ms. Allocated memory is still 130.0MB. Free memory was 94.2MB in the beginning and 92.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 611.60ms. Allocated memory is still 130.0MB. Free memory was 92.8MB in the beginning and 78.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 9844.67ms. Allocated memory was 130.0MB in the beginning and 276.8MB in the end (delta: 146.8MB). Free memory was 78.1MB in the beginning and 160.7MB in the end (delta: -82.6MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. * Witness Printer took 99.44ms. Allocated memory is still 276.8MB. Free memory was 160.7MB in the beginning and 152.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 125 PlacesBefore, 56 PlacesAfterwards, 114 TransitionsBefore, 44 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 8 FixpointIterations, 34 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 82 TotalNumberOfCompositions, 11659 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6381, positive: 6049, positive conditional: 0, positive unconditional: 6049, negative: 332, negative conditional: 0, negative unconditional: 332, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1967, positive: 1908, positive conditional: 0, positive unconditional: 1908, negative: 59, negative conditional: 0, negative unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1967, positive: 1883, positive conditional: 0, positive unconditional: 1883, negative: 84, negative conditional: 0, negative unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 84, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 59, negative conditional: 0, negative unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 155, positive: 46, positive conditional: 0, positive unconditional: 46, negative: 108, negative conditional: 0, negative unconditional: 108, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6381, positive: 4141, positive conditional: 0, positive unconditional: 4141, negative: 273, negative conditional: 0, negative unconditional: 273, unknown: 1967, unknown conditional: 0, unknown unconditional: 1967] , Statistics on independence cache: Total cache size (in pairs): 444, Positive cache size: 413, Positive conditional cache size: 0, Positive unconditional cache size: 413, Negative cache size: 31, Negative conditional cache size: 0, Negative unconditional cache size: 31 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 [pthread_create(&t1, 0, writer, 0)=-2, r=0, t1={8:0}, t2={6:0}, t3={3:0}, t4={5:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-1, r=0, t1={8:0}, t2={6:0}, t3={3:0}, t4={5:0}, 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 [pthread_create(&t3, 0, writer, 0)=0, r=1, t1={8:0}, t2={6:0}, t3={3:0}, t4={5:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=1, r=1, t1={8:0}, t2={6:0}, t3={3:0}, t4={5:0}, w=0, x=0, y=0] [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, 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() [L743] 2 r = l [L745] 2 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L730] 4 y = l VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L733] 4 int ly = y; VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 139 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 9.6s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 775 SdHoareTripleChecker+Valid, 1477.04ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 775 mSDsluCounter, 397 SdHoareTripleChecker+Invalid, 1212.10ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1084 mSDsCounter, 61 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1848 IncrementalHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 61 mSolverCounterUnsat, 160 mSDtfsCounter, 1848 mSolverCounterSat, 35.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4138occurred in iteration=1, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 6112 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 283 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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! [2021-11-12 23:49:21,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_550f99d9-0377-4dc2-adaa-5cfdeba1cee0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE