./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/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_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 58087887a1dd564559680784309457f518906cbf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:30:34,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:30:34,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:30:34,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:30:34,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:30:34,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:30:34,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:30:34,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:30:34,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:30:34,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:30:34,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:30:34,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:30:34,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:30:34,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:30:34,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:30:34,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:30:34,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:30:34,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:30:34,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:30:34,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:30:34,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:30:34,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:30:34,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:30:34,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:30:34,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:30:34,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:30:34,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:30:34,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:30:34,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:30:34,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:30:34,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:30:34,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:30:34,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:30:34,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:30:34,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:30:34,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:30:34,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:30:34,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:30:34,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:30:34,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:30:34,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:30:34,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:30:34,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:30:34,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:30:34,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:30:34,370 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:30:34,371 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:30:34,371 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:30:34,371 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:30:34,371 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:30:34,372 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:30:34,372 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:30:34,376 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:30:34,376 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:30:34,377 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:30:34,377 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:30:34,377 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:30:34,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:30:34,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:30:34,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:30:34,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:30:34,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:30:34,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:30:34,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:30:34,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:30:34,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:30:34,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:30:34,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:30:34,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:30:34,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:30:34,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:30:34,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:30:34,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:30:34,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:30:34,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:30:34,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:30:34,382 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:30:34,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:30:34,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:30:34,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:30:34,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:30:34,383 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_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58087887a1dd564559680784309457f518906cbf [2021-10-16 02:30:34,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:30:34,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:30:34,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:30:34,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:30:34,725 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:30:34,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2021-10-16 02:30:34,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/data/b086d8633/703a7e434f2e4f7fb021759b2c2246d7/FLAG71b3fdd54 [2021-10-16 02:30:35,580 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:30:35,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2021-10-16 02:30:35,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/data/b086d8633/703a7e434f2e4f7fb021759b2c2246d7/FLAG71b3fdd54 [2021-10-16 02:30:35,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/data/b086d8633/703a7e434f2e4f7fb021759b2c2246d7 [2021-10-16 02:30:35,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:30:35,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:30:35,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:30:35,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:30:35,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:30:35,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:30:35" (1/1) ... [2021-10-16 02:30:35,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be4e28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:35, skipping insertion in model container [2021-10-16 02:30:35,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:30:35" (1/1) ... [2021-10-16 02:30:35,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:30:35,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:30:35,925 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-10-16 02:30:36,061 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_b4f482ba-c78c-46bc-ba90-840009b1031d/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2021-10-16 02:30:36,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:30:36,079 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:30:36,116 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2021-10-16 02:30:36,156 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_b4f482ba-c78c-46bc-ba90-840009b1031d/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2021-10-16 02:30:36,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:30:36,220 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:30:36,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36 WrapperNode [2021-10-16 02:30:36,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:30:36,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:30:36,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:30:36,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:30:36,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:30:36,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:30:36,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:30:36,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:30:36,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:30:36,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:30:36,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:30:36,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:30:36,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (1/1) ... [2021-10-16 02:30:36,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:30:36,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:30:36,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:30:36,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:30:36,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:30:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:30:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-16 02:30:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2021-10-16 02:30:36,474 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2021-10-16 02:30:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:30:36,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:30:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:30:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-16 02:30:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:30:36,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:30:36,475 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2021-10-16 02:30:36,475 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2021-10-16 02:30:36,477 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-16 02:30:36,971 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:30:36,971 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-16 02:30:36,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:36 BoogieIcfgContainer [2021-10-16 02:30:36,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:30:36,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:30:36,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:30:36,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:30:36,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:30:35" (1/3) ... [2021-10-16 02:30:36,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd6ac82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:30:36, skipping insertion in model container [2021-10-16 02:30:36,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:36" (2/3) ... [2021-10-16 02:30:36,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd6ac82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:30:36, skipping insertion in model container [2021-10-16 02:30:36,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:36" (3/3) ... [2021-10-16 02:30:36,984 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2021-10-16 02:30:36,991 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-16 02:30:36,991 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:30:36,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:30:36,992 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-16 02:30:37,050 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,051 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,051 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,052 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,052 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,052 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,053 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,054 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,054 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,054 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,054 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,055 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,055 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,056 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,056 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,057 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,057 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,058 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,058 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,058 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,059 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,059 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,059 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,059 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,060 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,060 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,060 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,061 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,061 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,061 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,062 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,062 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,063 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,063 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,063 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,064 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,064 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,064 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,064 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,066 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,066 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,066 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,067 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,067 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,068 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,068 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,068 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,068 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,069 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,069 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,071 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,071 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,071 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,072 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,072 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,072 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,072 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,073 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,073 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,073 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,073 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,074 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,074 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,074 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,075 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,075 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,077 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,078 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,078 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,078 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,079 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,079 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,079 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,079 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,080 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,080 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,081 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,082 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,083 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,086 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,086 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,088 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,088 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,089 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,090 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,090 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,091 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,091 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,098 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,098 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,098 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,098 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,099 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,099 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,099 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,099 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,100 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,101 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,101 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,101 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,101 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,102 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,102 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,102 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,103 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,103 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,103 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,103 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,113 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,117 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,118 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,118 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,118 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,118 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,121 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,122 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,122 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,122 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,123 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,123 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,127 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,128 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,128 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,128 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,128 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,129 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,129 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,129 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,129 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,134 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,134 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,134 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,135 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,135 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,135 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,161 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,162 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,162 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-16 02:30:37,183 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-16 02:30:37,254 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:30:37,264 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, mConcurrency=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 [2021-10-16 02:30:37,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-16 02:30:37,297 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-16 02:30:37,311 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 110 transitions, 252 flow [2021-10-16 02:30:37,314 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 110 transitions, 252 flow [2021-10-16 02:30:37,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2021-10-16 02:30:37,409 INFO L129 PetriNetUnfolder]: 2/106 cut-off events. [2021-10-16 02:30:37,409 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-16 02:30:37,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 2/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2021-10-16 02:30:37,423 INFO L116 LiptonReduction]: Number of co-enabled transitions 2574 [2021-10-16 02:30:42,242 INFO L131 LiptonReduction]: Checked pairs total: 11247 [2021-10-16 02:30:42,242 INFO L133 LiptonReduction]: Total number of compositions: 78 [2021-10-16 02:30:42,257 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 44 transitions, 120 flow [2021-10-16 02:30:42,461 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3440 states, 3436 states have (on average 3.7264260768335276) internal successors, (12804), 3439 states have internal predecessors, (12804), 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) [2021-10-16 02:30:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 3440 states, 3436 states have (on average 3.7264260768335276) internal successors, (12804), 3439 states have internal predecessors, (12804), 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) [2021-10-16 02:30:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:30:42,485 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:42,486 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:42,487 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1456434960, now seen corresponding path program 1 times [2021-10-16 02:30:42,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:42,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821867428] [2021-10-16 02:30:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:42,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:42,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:42,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821867428] [2021-10-16 02:30:42,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821867428] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:42,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:42,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:30:42,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634516572] [2021-10-16 02:30:42,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:42,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:30:42,822 INFO L87 Difference]: Start difference. First operand has 3440 states, 3436 states have (on average 3.7264260768335276) internal successors, (12804), 3439 states have internal predecessors, (12804), 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) [2021-10-16 02:30:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:43,179 INFO L93 Difference]: Finished difference Result 7140 states and 25144 transitions. [2021-10-16 02:30:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:30:43,181 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 [2021-10-16 02:30:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:43,278 INFO L225 Difference]: With dead ends: 7140 [2021-10-16 02:30:43,279 INFO L226 Difference]: Without dead ends: 6526 [2021-10-16 02:30:43,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:30:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-10-16 02:30:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 4138. [2021-10-16 02:30:43,589 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) [2021-10-16 02:30:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 14942 transitions. [2021-10-16 02:30:43,629 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 14942 transitions. Word has length 9 [2021-10-16 02:30:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:43,629 INFO L470 AbstractCegarLoop]: Abstraction has 4138 states and 14942 transitions. [2021-10-16 02:30:43,629 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) [2021-10-16 02:30:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 14942 transitions. [2021-10-16 02:30:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:30:43,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:43,632 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:43,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:30:43,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -115270265, now seen corresponding path program 1 times [2021-10-16 02:30:43,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:43,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152107801] [2021-10-16 02:30:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:43,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:43,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:43,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152107801] [2021-10-16 02:30:43,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152107801] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:43,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:43,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:30:43,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588635657] [2021-10-16 02:30:43,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:30:43,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:30:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:30:43,707 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) [2021-10-16 02:30:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:43,777 INFO L93 Difference]: Finished difference Result 3324 states and 10329 transitions. [2021-10-16 02:30:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:30:43,777 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 [2021-10-16 02:30:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:43,811 INFO L225 Difference]: With dead ends: 3324 [2021-10-16 02:30:43,811 INFO L226 Difference]: Without dead ends: 3306 [2021-10-16 02:30:43,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:30:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-10-16 02:30:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 3306. [2021-10-16 02:30:44,023 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) [2021-10-16 02:30:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 10281 transitions. [2021-10-16 02:30:44,046 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 10281 transitions. Word has length 11 [2021-10-16 02:30:44,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:44,047 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 10281 transitions. [2021-10-16 02:30:44,048 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) [2021-10-16 02:30:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 10281 transitions. [2021-10-16 02:30:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:30:44,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:44,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:44,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:30:44,050 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash -524013937, now seen corresponding path program 2 times [2021-10-16 02:30:44,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:44,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725558417] [2021-10-16 02:30:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:44,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:44,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:44,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725558417] [2021-10-16 02:30:44,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725558417] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:44,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:44,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:30:44,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361908944] [2021-10-16 02:30:44,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:30:44,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:30:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:30:44,151 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) [2021-10-16 02:30:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:44,311 INFO L93 Difference]: Finished difference Result 3786 states and 11317 transitions. [2021-10-16 02:30:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:30:44,312 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 [2021-10-16 02:30:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:44,365 INFO L225 Difference]: With dead ends: 3786 [2021-10-16 02:30:44,365 INFO L226 Difference]: Without dead ends: 3748 [2021-10-16 02:30:44,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:30:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-10-16 02:30:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 2804. [2021-10-16 02:30:44,511 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) [2021-10-16 02:30:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 8673 transitions. [2021-10-16 02:30:44,534 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 8673 transitions. Word has length 11 [2021-10-16 02:30:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 8673 transitions. [2021-10-16 02:30:44,534 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) [2021-10-16 02:30:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 8673 transitions. [2021-10-16 02:30:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:30:44,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:44,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:44,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:30:44,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:44,554 INFO L82 PathProgramCache]: Analyzing trace with hash -290374655, now seen corresponding path program 1 times [2021-10-16 02:30:44,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:44,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81474728] [2021-10-16 02:30:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:44,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:44,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:44,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81474728] [2021-10-16 02:30:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81474728] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:44,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:44,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:30:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249026598] [2021-10-16 02:30:44,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:44,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:30:44,703 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) [2021-10-16 02:30:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:44,929 INFO L93 Difference]: Finished difference Result 5490 states and 16905 transitions. [2021-10-16 02:30:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:30:44,930 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 [2021-10-16 02:30:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:44,967 INFO L225 Difference]: With dead ends: 5490 [2021-10-16 02:30:44,967 INFO L226 Difference]: Without dead ends: 5108 [2021-10-16 02:30:44,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:30:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2021-10-16 02:30:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 3334. [2021-10-16 02:30:45,219 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) [2021-10-16 02:30:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 10545 transitions. [2021-10-16 02:30:45,240 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 10545 transitions. Word has length 13 [2021-10-16 02:30:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:45,242 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 10545 transitions. [2021-10-16 02:30:45,242 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) [2021-10-16 02:30:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 10545 transitions. [2021-10-16 02:30:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:30:45,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:45,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:45,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:30:45,245 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash -160224541, now seen corresponding path program 1 times [2021-10-16 02:30:45,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:45,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936391400] [2021-10-16 02:30:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:45,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:45,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:45,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936391400] [2021-10-16 02:30:45,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936391400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:45,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:45,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:30:45,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658254025] [2021-10-16 02:30:45,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:45,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:30:45,385 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) [2021-10-16 02:30:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:45,466 INFO L93 Difference]: Finished difference Result 1466 states and 3441 transitions. [2021-10-16 02:30:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:30:45,467 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 [2021-10-16 02:30:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:45,473 INFO L225 Difference]: With dead ends: 1466 [2021-10-16 02:30:45,473 INFO L226 Difference]: Without dead ends: 1466 [2021-10-16 02:30:45,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:30:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-10-16 02:30:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1332. [2021-10-16 02:30:45,519 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) [2021-10-16 02:30:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 3149 transitions. [2021-10-16 02:30:45,524 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 3149 transitions. Word has length 16 [2021-10-16 02:30:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:45,524 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 3149 transitions. [2021-10-16 02:30:45,525 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) [2021-10-16 02:30:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 3149 transitions. [2021-10-16 02:30:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:30:45,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:45,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:45,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:30:45,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2026278076, now seen corresponding path program 1 times [2021-10-16 02:30:45,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:45,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091543597] [2021-10-16 02:30:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:45,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:45,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:45,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091543597] [2021-10-16 02:30:45,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091543597] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:45,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:45,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:30:45,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930346948] [2021-10-16 02:30:45,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:45,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:30:45,601 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) [2021-10-16 02:30:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:45,710 INFO L93 Difference]: Finished difference Result 1550 states and 3572 transitions. [2021-10-16 02:30:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:30:45,710 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 [2021-10-16 02:30:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:45,715 INFO L225 Difference]: With dead ends: 1550 [2021-10-16 02:30:45,716 INFO L226 Difference]: Without dead ends: 1496 [2021-10-16 02:30:45,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:30:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-10-16 02:30:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1164. [2021-10-16 02:30:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1162 states have (on average 2.3545611015490535) internal successors, (2736), 1163 states have internal predecessors, (2736), 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) [2021-10-16 02:30:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 2736 transitions. [2021-10-16 02:30:45,795 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 2736 transitions. Word has length 16 [2021-10-16 02:30:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:45,796 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 2736 transitions. [2021-10-16 02:30:45,796 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) [2021-10-16 02:30:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 2736 transitions. [2021-10-16 02:30:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:30:45,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:45,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:30:45,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:30:45,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 893711697, now seen corresponding path program 1 times [2021-10-16 02:30:45,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:45,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163945061] [2021-10-16 02:30:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:45,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:45,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:45,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163945061] [2021-10-16 02:30:45,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163945061] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:45,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:45,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:30:45,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419312169] [2021-10-16 02:30:45,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:30:45,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:30:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:30:45,876 INFO L87 Difference]: Start difference. First operand 1164 states and 2736 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) [2021-10-16 02:30:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:45,973 INFO L93 Difference]: Finished difference Result 1380 states and 3168 transitions. [2021-10-16 02:30:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:30:45,973 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 [2021-10-16 02:30:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:45,977 INFO L225 Difference]: With dead ends: 1380 [2021-10-16 02:30:45,977 INFO L226 Difference]: Without dead ends: 1258 [2021-10-16 02:30:45,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:30:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-10-16 02:30:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 928. [2021-10-16 02:30:46,011 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) [2021-10-16 02:30:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2175 transitions. [2021-10-16 02:30:46,014 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2175 transitions. Word has length 16 [2021-10-16 02:30:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:46,015 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 2175 transitions. [2021-10-16 02:30:46,015 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) [2021-10-16 02:30:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2175 transitions. [2021-10-16 02:30:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:30:46,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:46,018 INFO L512 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] [2021-10-16 02:30:46,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:30:46,019 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash 612819739, now seen corresponding path program 1 times [2021-10-16 02:30:46,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:46,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137246926] [2021-10-16 02:30:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:46,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:46,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:46,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137246926] [2021-10-16 02:30:46,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137246926] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:46,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:46,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:30:46,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891026667] [2021-10-16 02:30:46,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:30:46,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:30:46,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:30:46,103 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) [2021-10-16 02:30:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:46,180 INFO L93 Difference]: Finished difference Result 1024 states and 2371 transitions. [2021-10-16 02:30:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:30:46,180 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 [2021-10-16 02:30:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:46,183 INFO L225 Difference]: With dead ends: 1024 [2021-10-16 02:30:46,184 INFO L226 Difference]: Without dead ends: 964 [2021-10-16 02:30:46,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:30:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-10-16 02:30:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 908. [2021-10-16 02:30:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 906 states have (on average 2.3509933774834435) internal successors, (2130), 907 states have internal predecessors, (2130), 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) [2021-10-16 02:30:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2130 transitions. [2021-10-16 02:30:46,213 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2130 transitions. Word has length 22 [2021-10-16 02:30:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:46,213 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2130 transitions. [2021-10-16 02:30:46,214 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) [2021-10-16 02:30:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2130 transitions. [2021-10-16 02:30:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:30:46,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:46,216 INFO L512 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] [2021-10-16 02:30:46,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:30:46,217 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-10-16 02:30:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -229635067, now seen corresponding path program 2 times [2021-10-16 02:30:46,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:46,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343302303] [2021-10-16 02:30:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:46,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:30:46,250 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:30:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:30:46,313 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 02:30:46,313 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:30:46,314 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:30:46,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:30:46,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-16 02:30:46,316 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-16 02:30:46,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-16 02:30:46,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-16 02:30:46,318 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:30:46,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:30:46,326 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-16 02:30:46,326 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:30:46,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:30:46 BasicIcfg [2021-10-16 02:30:46,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:30:46,454 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:30:46,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:30:46,455 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:30:46,455 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:36" (3/4) ... [2021-10-16 02:30:46,457 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:30:46,541 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:30:46,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:30:46,542 INFO L168 Benchmark]: Toolchain (without parser) took 10909.78 ms. Allocated memory was 111.1 MB in the beginning and 377.5 MB in the end (delta: 266.3 MB). Free memory was 66.4 MB in the beginning and 262.0 MB in the end (delta: -195.6 MB). Peak memory consumption was 70.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:30:46,543 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 111.1 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:30:46,543 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.25 ms. Allocated memory is still 111.1 MB. Free memory was 66.2 MB in the beginning and 73.9 MB in the end (delta: -7.7 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:30:46,544 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.68 ms. Allocated memory is still 111.1 MB. Free memory was 73.6 MB in the beginning and 71.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:30:46,544 INFO L168 Benchmark]: Boogie Preprocessor took 64.14 ms. Allocated memory is still 111.1 MB. Free memory was 71.5 MB in the beginning and 70.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:30:46,545 INFO L168 Benchmark]: RCFGBuilder took 595.20 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 55.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:30:46,545 INFO L168 Benchmark]: TraceAbstraction took 9478.59 ms. Allocated memory was 111.1 MB in the beginning and 377.5 MB in the end (delta: 266.3 MB). Free memory was 54.4 MB in the beginning and 270.4 MB in the end (delta: -215.9 MB). Peak memory consumption was 118.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:30:46,546 INFO L168 Benchmark]: Witness Printer took 86.78 ms. Allocated memory is still 377.5 MB. Free memory was 270.4 MB in the beginning and 262.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:30:46,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 111.1 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 588.25 ms. Allocated memory is still 111.1 MB. Free memory was 66.2 MB in the beginning and 73.9 MB in the end (delta: -7.7 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.68 ms. Allocated memory is still 111.1 MB. Free memory was 73.6 MB in the beginning and 71.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.14 ms. Allocated memory is still 111.1 MB. Free memory was 71.5 MB in the beginning and 70.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 595.20 ms. Allocated memory is still 111.1 MB. Free memory was 70.1 MB in the beginning and 55.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9478.59 ms. Allocated memory was 111.1 MB in the beginning and 377.5 MB in the end (delta: 266.3 MB). Free memory was 54.4 MB in the beginning and 270.4 MB in the end (delta: -215.9 MB). Peak memory consumption was 118.1 MB. Max. memory is 16.1 GB. * Witness Printer took 86.78 ms. Allocated memory is still 377.5 MB. Free memory was 270.4 MB in the beginning and 262.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4928.2ms, 121 PlacesBefore, 56 PlacesAfterwards, 110 TransitionsBefore, 44 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 8 FixpointIterations, 30 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 78 TotalNumberOfCompositions, 11247 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6117, positive: 5795, positive conditional: 0, positive unconditional: 5795, negative: 322, negative conditional: 0, negative unconditional: 322, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1955, positive: 1905, positive conditional: 0, positive unconditional: 1905, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1955, positive: 1871, positive conditional: 0, positive unconditional: 1871, negative: 84, negative conditional: 0, negative unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 84, positive: 34, positive conditional: 0, positive unconditional: 34, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 189, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 117, negative conditional: 0, negative unconditional: 117, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6117, positive: 3890, positive conditional: 0, positive unconditional: 3890, negative: 272, negative conditional: 0, negative unconditional: 272, unknown: 1955, unknown conditional: 0, unknown unconditional: 1955] , Statistics on independence cache: Total cache size (in pairs): 410, Positive cache size: 380, Positive conditional cache size: 0, Positive unconditional cache size: 380, Negative cache size: 30, Negative conditional cache size: 0, Negative unconditional cache size: 30 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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 [r=0, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [r=1, w=0, x=0, y=0] [L736] 2 int lx = x; [L738] COND FALSE 2 !(!(ly == lx)) VAL [r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [r=2, w=0, x=0, y=0] [L743] 2 r = l [L745] 2 return 0; [L714] CALL 3 __VERIFIER_atomic_take_write_lock() [L706] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 3 !(!cond) [L706] RET 3 assume_abort_if_not(w==0 && r==0) [L707] 3 w = 1 [L714] RET 3 __VERIFIER_atomic_take_write_lock() [L716] 3 x = 3 VAL [r=0, w=1, x=3, y=0] [L730] 4 y = l VAL [r=0, w=1, x=3, y=0] [L733] 4 int ly = y; VAL [r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [r=0, w=1, x=3, y=0] - 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. - 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 9070.9ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 56.0ms, AutomataDifference: 1466.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5196.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 549 SDtfs, 711 SDslu, 841 SDs, 0 SdLazy, 450 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 374.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 215.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4138occurred in iteration=1, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1200.4ms AutomataMinimizationTime, 8 MinimizatonAttempts, 5958 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 40.7ms SsaConstructionTime, 220.1ms SatisfiabilityAnalysisTime, 547.9ms InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 246 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 02:30:46,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f482ba-c78c-46bc-ba90-840009b1031d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...