./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire --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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:30:45,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:30:45,313 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:30:45,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:30:45,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:30:45,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:30:45,367 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:30:45,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:30:45,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:30:45,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:30:45,375 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:30:45,376 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:30:45,376 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:30:45,378 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:30:45,378 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:30:45,379 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:30:45,379 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:30:45,380 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:30:45,380 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:30:45,381 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:30:45,382 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:30:45,382 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:30:45,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:30:45,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:30:45,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:30:45,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:30:45,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:30:45,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:30:45,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:30:45,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:30:45,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:30:45,389 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:30:45,389 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:30:45,390 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:30:45,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:30:45,390 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:30:45,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:30:45,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:45,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:30:45,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:30:45,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:30:45,393 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:30:45,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:30:45,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:30:45,394 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:30:45,394 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:30:45,395 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:30:45,395 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_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2023-11-23 21:30:45,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:30:45,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:30:45,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:30:45,756 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:30:45,757 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:30:45,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-23 21:30:48,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:30:49,204 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:30:49,205 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-23 21:30:49,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/data/526dd51b7/aab002d58182489aa8ecffe84209d074/FLAG18fbac408 [2023-11-23 21:30:49,233 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/data/526dd51b7/aab002d58182489aa8ecffe84209d074 [2023-11-23 21:30:49,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:30:49,238 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:30:49,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:49,240 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:30:49,246 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:30:49,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134ba670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49, skipping insertion in model container [2023-11-23 21:30:49,249 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,276 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:30:49,464 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_60358b72-a9e5-4ac2-9cf9-8583d86226da/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2023-11-23 21:30:49,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:49,482 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:30:49,518 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_60358b72-a9e5-4ac2-9cf9-8583d86226da/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2023-11-23 21:30:49,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:49,535 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:49,535 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:30:49,544 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:30:49,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49 WrapperNode [2023-11-23 21:30:49,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:49,547 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:49,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:30:49,547 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:30:49,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,612 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2023-11-23 21:30:49,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:49,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:30:49,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:30:49,614 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:30:49,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,627 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,627 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,636 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,646 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:30:49,647 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:30:49,647 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:30:49,648 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:30:49,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (1/1) ... [2023-11-23 21:30:49,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:49,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:30:49,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:30:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:30:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 21:30:49,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 21:30:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 21:30:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 21:30:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:30:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:30:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:30:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 21:30:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 21:30:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:30:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:30:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:30:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:30:49,741 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:30:49,843 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:30:49,846 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:30:50,143 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:30:50,422 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:30:50,423 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:30:50,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:50 BoogieIcfgContainer [2023-11-23 21:30:50,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:30:50,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:30:50,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:30:50,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:30:50,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:30:49" (1/3) ... [2023-11-23 21:30:50,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a25eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:50, skipping insertion in model container [2023-11-23 21:30:50,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:49" (2/3) ... [2023-11-23 21:30:50,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a25eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:50, skipping insertion in model container [2023-11-23 21:30:50,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:50" (3/3) ... [2023-11-23 21:30:50,439 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-11-23 21:30:50,448 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 21:30:50,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:30:50,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:30:50,462 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:30:50,529 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 21:30:50,569 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 66 flow [2023-11-23 21:30:50,622 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 115 states, 114 states have (on average 2.3421052631578947) internal successors, (267), 114 states have internal predecessors, (267), 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) [2023-11-23 21:30:50,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:30:50,654 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;@2123b203, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:30:50,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 21:30:50,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 114 states have (on average 2.3421052631578947) internal successors, (267), 114 states have internal predecessors, (267), 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) [2023-11-23 21:30:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:30:50,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:50,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:50,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:30:50,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1179174115, now seen corresponding path program 1 times [2023-11-23 21:30:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822696469] [2023-11-23 21:30:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:50,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:51,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:51,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822696469] [2023-11-23 21:30:51,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822696469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:51,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:51,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:51,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856239763] [2023-11-23 21:30:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:51,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:30:51,563 INFO L87 Difference]: Start difference. First operand has 115 states, 114 states have (on average 2.3421052631578947) internal successors, (267), 114 states have internal predecessors, (267), 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 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2023-11-23 21:30:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:51,701 INFO L93 Difference]: Finished difference Result 187 states and 444 transitions. [2023-11-23 21:30:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:51,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 [2023-11-23 21:30:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:51,716 INFO L225 Difference]: With dead ends: 187 [2023-11-23 21:30:51,717 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 21:30:51,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:51,722 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:51,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 21:30:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 143. [2023-11-23 21:30:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.3661971830985915) internal successors, (336), 142 states have internal predecessors, (336), 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) [2023-11-23 21:30:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 336 transitions. [2023-11-23 21:30:51,777 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 336 transitions. Word has length 16 [2023-11-23 21:30:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:51,778 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 336 transitions. [2023-11-23 21:30:51,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2023-11-23 21:30:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 336 transitions. [2023-11-23 21:30:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:30:51,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:51,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:51,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:30:51,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:30:51,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:51,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1224445378, now seen corresponding path program 1 times [2023-11-23 21:30:51,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:51,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081003183] [2023-11-23 21:30:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:51,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:52,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081003183] [2023-11-23 21:30:52,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081003183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:52,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:52,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:52,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724766086] [2023-11-23 21:30:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:52,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:30:52,074 INFO L87 Difference]: Start difference. First operand 143 states and 336 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-23 21:30:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:52,183 INFO L93 Difference]: Finished difference Result 195 states and 462 transitions. [2023-11-23 21:30:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:52,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2023-11-23 21:30:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:52,187 INFO L225 Difference]: With dead ends: 195 [2023-11-23 21:30:52,187 INFO L226 Difference]: Without dead ends: 195 [2023-11-23 21:30:52,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:52,189 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:52,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 15 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-23 21:30:52,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2023-11-23 21:30:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3666666666666667) internal successors, (355), 150 states have internal predecessors, (355), 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) [2023-11-23 21:30:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 355 transitions. [2023-11-23 21:30:52,208 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 355 transitions. Word has length 19 [2023-11-23 21:30:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:52,208 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 355 transitions. [2023-11-23 21:30:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-11-23 21:30:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 355 transitions. [2023-11-23 21:30:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:30:52,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:52,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:52,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:30:52,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:30:52,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1796376602, now seen corresponding path program 1 times [2023-11-23 21:30:52,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:52,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21362781] [2023-11-23 21:30:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:52,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:53,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21362781] [2023-11-23 21:30:53,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21362781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584225668] [2023-11-23 21:30:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:53,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:53,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:53,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:53,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:30:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:53,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:30:53,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:56,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:57,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584225668] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:57,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:57,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 19 [2023-11-23 21:30:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791149843] [2023-11-23 21:30:57,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:57,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:30:57,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:30:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=291, Unknown=1, NotChecked=0, Total=380 [2023-11-23 21:30:57,090 INFO L87 Difference]: Start difference. First operand 151 states and 355 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-11-23 21:30:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:57,908 INFO L93 Difference]: Finished difference Result 338 states and 804 transitions. [2023-11-23 21:30:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:30:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 20 [2023-11-23 21:30:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:57,911 INFO L225 Difference]: With dead ends: 338 [2023-11-23 21:30:57,912 INFO L226 Difference]: Without dead ends: 317 [2023-11-23 21:30:57,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=168, Invalid=587, Unknown=1, NotChecked=0, Total=756 [2023-11-23 21:30:57,914 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:57,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 43 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-23 21:30:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 187. [2023-11-23 21:30:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.403225806451613) internal successors, (447), 186 states have internal predecessors, (447), 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) [2023-11-23 21:30:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 447 transitions. [2023-11-23 21:30:57,947 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 447 transitions. Word has length 20 [2023-11-23 21:30:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:57,948 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 447 transitions. [2023-11-23 21:30:57,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-11-23 21:30:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 447 transitions. [2023-11-23 21:30:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:30:57,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:57,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:57,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:58,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:58,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:30:58,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash -327709884, now seen corresponding path program 2 times [2023-11-23 21:30:58,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:58,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936881355] [2023-11-23 21:30:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:58,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:58,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:58,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936881355] [2023-11-23 21:30:58,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936881355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:58,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:58,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087481258] [2023-11-23 21:30:58,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:58,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:58,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:30:58,368 INFO L87 Difference]: Start difference. First operand 187 states and 447 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-23 21:30:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:58,481 INFO L93 Difference]: Finished difference Result 247 states and 603 transitions. [2023-11-23 21:30:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2023-11-23 21:30:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:58,485 INFO L225 Difference]: With dead ends: 247 [2023-11-23 21:30:58,486 INFO L226 Difference]: Without dead ends: 247 [2023-11-23 21:30:58,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:58,490 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:58,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-23 21:30:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 179. [2023-11-23 21:30:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.4269662921348316) internal successors, (432), 178 states have internal predecessors, (432), 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) [2023-11-23 21:30:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 432 transitions. [2023-11-23 21:30:58,520 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 432 transitions. Word has length 20 [2023-11-23 21:30:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:58,521 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 432 transitions. [2023-11-23 21:30:58,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-23 21:30:58,521 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 432 transitions. [2023-11-23 21:30:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:30:58,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:58,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:58,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:30:58,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:30:58,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2068424325, now seen corresponding path program 1 times [2023-11-23 21:30:58,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926163946] [2023-11-23 21:30:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:59,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:59,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926163946] [2023-11-23 21:30:59,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926163946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:59,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940110493] [2023-11-23 21:30:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:59,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:59,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:30:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:59,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:30:59,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:00,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:02,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940110493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:02,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439793246] [2023-11-23 21:31:02,408 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-23 21:31:02,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:02,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-11-23 21:31:02,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169003890] [2023-11-23 21:31:02,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:02,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:31:02,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:31:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:31:02,420 INFO L87 Difference]: Start difference. First operand 179 states and 432 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 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) [2023-11-23 21:31:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:07,448 INFO L93 Difference]: Finished difference Result 796 states and 1858 transitions. [2023-11-23 21:31:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-23 21:31:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 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 23 [2023-11-23 21:31:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:07,455 INFO L225 Difference]: With dead ends: 796 [2023-11-23 21:31:07,455 INFO L226 Difference]: Without dead ends: 632 [2023-11-23 21:31:07,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=471, Invalid=1785, Unknown=0, NotChecked=0, Total=2256 [2023-11-23 21:31:07,458 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 325 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:07,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 169 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:31:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-11-23 21:31:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 365. [2023-11-23 21:31:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.5) internal successors, (910), 364 states have internal predecessors, (910), 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) [2023-11-23 21:31:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 910 transitions. [2023-11-23 21:31:07,483 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 910 transitions. Word has length 23 [2023-11-23 21:31:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:07,483 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 910 transitions. [2023-11-23 21:31:07,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 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) [2023-11-23 21:31:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 910 transitions. [2023-11-23 21:31:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:31:07,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:07,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:07,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:07,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:07,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:31:07,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash -430690521, now seen corresponding path program 3 times [2023-11-23 21:31:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:07,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773854496] [2023-11-23 21:31:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:08,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:08,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773854496] [2023-11-23 21:31:08,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773854496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:08,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:08,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:08,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358908058] [2023-11-23 21:31:08,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:08,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:08,005 INFO L87 Difference]: Start difference. First operand 365 states and 910 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2023-11-23 21:31:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:08,219 INFO L93 Difference]: Finished difference Result 493 states and 1224 transitions. [2023-11-23 21:31:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:31:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 24 [2023-11-23 21:31:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:08,225 INFO L225 Difference]: With dead ends: 493 [2023-11-23 21:31:08,225 INFO L226 Difference]: Without dead ends: 493 [2023-11-23 21:31:08,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:31:08,226 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:08,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 18 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-11-23 21:31:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2023-11-23 21:31:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.467948717948718) internal successors, (770), 312 states have internal predecessors, (770), 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) [2023-11-23 21:31:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 770 transitions. [2023-11-23 21:31:08,245 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 770 transitions. Word has length 24 [2023-11-23 21:31:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:08,246 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 770 transitions. [2023-11-23 21:31:08,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2023-11-23 21:31:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 770 transitions. [2023-11-23 21:31:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 21:31:08,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:08,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:08,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:31:08,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:31:08,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:08,250 INFO L85 PathProgramCache]: Analyzing trace with hash 908406526, now seen corresponding path program 2 times [2023-11-23 21:31:08,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:08,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385005742] [2023-11-23 21:31:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:08,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:09,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:09,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385005742] [2023-11-23 21:31:09,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385005742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:09,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000303128] [2023-11-23 21:31:09,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:31:09,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:09,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:09,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:09,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:31:10,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:31:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:10,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:31:10,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:10,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:13,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000303128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:13,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511046012] [2023-11-23 21:31:13,172 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-23 21:31:13,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:13,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-23 21:31:13,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12505655] [2023-11-23 21:31:13,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:13,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 21:31:13,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 21:31:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:31:13,177 INFO L87 Difference]: Start difference. First operand 313 states and 770 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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) [2023-11-23 21:31:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:20,775 INFO L93 Difference]: Finished difference Result 1020 states and 2442 transitions. [2023-11-23 21:31:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-23 21:31:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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 26 [2023-11-23 21:31:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:20,784 INFO L225 Difference]: With dead ends: 1020 [2023-11-23 21:31:20,784 INFO L226 Difference]: Without dead ends: 907 [2023-11-23 21:31:20,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=612, Invalid=2468, Unknown=0, NotChecked=0, Total=3080 [2023-11-23 21:31:20,787 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 286 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:20,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 232 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-23 21:31:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-11-23 21:31:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 463. [2023-11-23 21:31:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.5432900432900434) internal successors, (1175), 462 states have internal predecessors, (1175), 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) [2023-11-23 21:31:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1175 transitions. [2023-11-23 21:31:20,812 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1175 transitions. Word has length 26 [2023-11-23 21:31:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:20,812 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 1175 transitions. [2023-11-23 21:31:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 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) [2023-11-23 21:31:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1175 transitions. [2023-11-23 21:31:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 21:31:20,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:20,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:20,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:21,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:21,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:31:21,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1657139236, now seen corresponding path program 3 times [2023-11-23 21:31:21,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803735536] [2023-11-23 21:31:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:21,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:22,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803735536] [2023-11-23 21:31:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803735536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005059784] [2023-11-23 21:31:22,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:31:22,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:22,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:22,771 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:22,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:31:23,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:31:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:23,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:31:23,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:24,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:25,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005059784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:25,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1959538378] [2023-11-23 21:31:25,492 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-23 21:31:25,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:25,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-23 21:31:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486348968] [2023-11-23 21:31:25,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 21:31:25,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 21:31:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:31:25,496 INFO L87 Difference]: Start difference. First operand 463 states and 1175 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 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) [2023-11-23 21:31:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:31,340 INFO L93 Difference]: Finished difference Result 1027 states and 2537 transitions. [2023-11-23 21:31:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-23 21:31:31,340 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 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 26 [2023-11-23 21:31:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:31,347 INFO L225 Difference]: With dead ends: 1027 [2023-11-23 21:31:31,347 INFO L226 Difference]: Without dead ends: 914 [2023-11-23 21:31:31,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=547, Invalid=2209, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 21:31:31,349 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 269 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:31,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 179 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 21:31:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2023-11-23 21:31:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 533. [2023-11-23 21:31:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.5714285714285716) internal successors, (1368), 532 states have internal predecessors, (1368), 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) [2023-11-23 21:31:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1368 transitions. [2023-11-23 21:31:31,376 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1368 transitions. Word has length 26 [2023-11-23 21:31:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:31,377 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 1368 transitions. [2023-11-23 21:31:31,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 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) [2023-11-23 21:31:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1368 transitions. [2023-11-23 21:31:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:31:31,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:31,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:31,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 21:31:31,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:31,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 21:31:31,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1075582508, now seen corresponding path program 4 times [2023-11-23 21:31:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:31,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729918461] [2023-11-23 21:31:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:32,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:32,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729918461] [2023-11-23 21:31:32,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729918461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:32,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666799550] [2023-11-23 21:31:32,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:31:32,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:32,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:32,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60358b72-a9e5-4ac2-9cf9-8583d86226da/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:31:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:33,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 21:31:33,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:34,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:35,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666799550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711829305] [2023-11-23 21:31:35,229 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-23 21:31:35,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:35,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 37 [2023-11-23 21:31:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745049006] [2023-11-23 21:31:35,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:35,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-23 21:31:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-23 21:31:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:31:35,233 INFO L87 Difference]: Start difference. First operand 533 states and 1368 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 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)