./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/twostage_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:51:51,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:51:51,547 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:51:51,554 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:51:51,555 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:51:51,607 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:51:51,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:51:51,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:51:51,610 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:51:51,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:51:51,616 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:51:51,617 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:51:51,617 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:51:51,619 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:51:51,620 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:51:51,620 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:51:51,621 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:51:51,621 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:51:51,622 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:51:51,622 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:51:51,623 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:51:51,623 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:51:51,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:51:51,625 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:51:51,626 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:51:51,626 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:51:51,627 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:51:51,627 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:51:51,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:51:51,628 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:51:51,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:51:51,630 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:51:51,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:51:51,631 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:51:51,631 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:51:51,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:51:51,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:51:51,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:51:51,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:51:51,633 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:51:51,634 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:51:51,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:51:51,635 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:51:51,635 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:51:51,636 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:51:51,636 INFO L153 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_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2023-11-19 04:51:51,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:51:51,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:51:51,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:51:51,987 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:51:51,988 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:51:51,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/pthread/twostage_3.i [2023-11-19 04:51:55,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:51:55,618 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:51:55,623 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/sv-benchmarks/c/pthread/twostage_3.i [2023-11-19 04:51:55,650 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/data/e63ce7937/d9311f473bcd416daa69c92d4f17d4a3/FLAG8821c937b [2023-11-19 04:51:55,668 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/data/e63ce7937/d9311f473bcd416daa69c92d4f17d4a3 [2023-11-19 04:51:55,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:51:55,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:51:55,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:51:55,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:51:55,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:51:55,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:55" (1/1) ... [2023-11-19 04:51:55,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32de5c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:55, skipping insertion in model container [2023-11-19 04:51:55,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:55" (1/1) ... [2023-11-19 04:51:55,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:51:56,745 WARN L240 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_4a38c241-4798-48ab-9784-3a9fb871c65e/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2023-11-19 04:51:56,794 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 04:51:56,797 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 04:51:56,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:51:56,819 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:51:56,919 WARN L240 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_4a38c241-4798-48ab-9784-3a9fb871c65e/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2023-11-19 04:51:56,951 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 04:51:56,958 WARN L1588 CHandler]: Possible shadowing of function lock [2023-11-19 04:51:56,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:51:57,095 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:51:57,104 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:51:57,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57 WrapperNode [2023-11-19 04:51:57,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:51:57,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:51:57,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:51:57,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:51:57,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,234 INFO L138 Inliner]: procedures = 374, calls = 62, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 191 [2023-11-19 04:51:57,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:51:57,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:51:57,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:51:57,237 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:51:57,249 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,268 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,269 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,317 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:51:57,338 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:51:57,338 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:51:57,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:51:57,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (1/1) ... [2023-11-19 04:51:57,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:51:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:57,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:51:57,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38c241-4798-48ab-9784-3a9fb871c65e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:51:57,468 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2023-11-19 04:51:57,469 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2023-11-19 04:51:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2023-11-19 04:51:57,469 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2023-11-19 04:51:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2023-11-19 04:51:57,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:51:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:51:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:51:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:51:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:51:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 04:51:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:51:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:51:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:51:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:51:57,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:51:57,475 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 04:51:57,722 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:51:57,725 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:51:58,270 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:51:58,284 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:51:58,284 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 04:51:58,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:58 BoogieIcfgContainer [2023-11-19 04:51:58,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:51:58,294 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:51:58,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:51:58,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:51:58,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:51:55" (1/3) ... [2023-11-19 04:51:58,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f859d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:58, skipping insertion in model container [2023-11-19 04:51:58,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:57" (2/3) ... [2023-11-19 04:51:58,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f859d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:58, skipping insertion in model container [2023-11-19 04:51:58,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:58" (3/3) ... [2023-11-19 04:51:58,306 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2023-11-19 04:51:58,320 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 04:51:58,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:51:58,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:51:58,344 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 04:51:58,477 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-19 04:51:58,537 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:51:58,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 242 transitions, 504 flow [2023-11-19 04:51:58,559 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 242 transitions, 504 flow [2023-11-19 04:51:58,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 242 transitions, 504 flow [2023-11-19 04:51:58,777 INFO L124 PetriNetUnfolderBase]: 41/447 cut-off events. [2023-11-19 04:51:58,778 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 04:51:58,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 447 events. 41/447 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1626 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-11-19 04:51:58,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 7782 [2023-11-19 04:52:32,460 INFO L134 LiptonReduction]: Checked pairs total: 18122 [2023-11-19 04:52:32,460 INFO L136 LiptonReduction]: Total number of compositions: 262 [2023-11-19 04:52:32,478 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 41 transitions, 102 flow [2023-11-19 04:52:32,595 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 797 states, 788 states have (on average 2.616751269035533) internal successors, (2062), 796 states have internal predecessors, (2062), 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) [2023-11-19 04:52:32,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:52:32,640 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7eadac0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:52:32,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 04:52:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 797 states, 788 states have (on average 2.616751269035533) internal successors, (2062), 796 states have internal predecessors, (2062), 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) [2023-11-19 04:52:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:52:32,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:32,656 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 04:52:32,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 04:52:32,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:32,663 INFO L85 PathProgramCache]: Analyzing trace with hash 696664225, now seen corresponding path program 1 times [2023-11-19 04:52:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:32,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594786019] [2023-11-19 04:52:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:52:32,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:52:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:52:33,088 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:52:33,090 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:52:33,091 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 04:52:33,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-19 04:52:33,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 04:52:33,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 04:52:33,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:52:33,098 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 04:52:33,102 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 04:52:33,102 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 04:52:33,147 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-19 04:52:33,153 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:52:33,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 289 transitions, 622 flow [2023-11-19 04:52:33,154 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 289 transitions, 622 flow [2023-11-19 04:52:33,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 289 transitions, 622 flow [2023-11-19 04:52:33,450 INFO L124 PetriNetUnfolderBase]: 157/1331 cut-off events. [2023-11-19 04:52:33,451 INFO L125 PetriNetUnfolderBase]: For 72/73 co-relation queries the response was YES. [2023-11-19 04:52:33,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 1331 events. 157/1331 cut-off events. For 72/73 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7669 event pairs, 2 based on Foata normal form. 0/1181 useless extension candidates. Maximal degree in co-relation 790. Up to 32 conditions per place. [2023-11-19 04:52:33,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 19728