./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/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_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/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_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:22,215 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:22,350 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:34:22,358 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:22,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:22,387 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:22,388 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:22,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:22,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:22,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:22,391 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:22,392 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:22,393 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:22,394 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:22,395 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:22,396 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:22,396 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:22,397 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:22,398 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:22,399 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:22,400 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:22,401 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:22,402 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:22,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:22,403 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:34:22,403 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:22,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:34:22,405 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:22,405 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:22,406 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:22,406 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:22,407 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:34:22,407 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:22,408 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:22,408 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:22,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:22,409 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:22,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:22,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:22,410 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:22,411 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:22,411 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:22,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:22,412 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:22,413 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:22,413 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:22,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:22,414 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_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2023-11-23 20:34:22,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:22,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:22,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:22,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:22,784 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:22,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2023-11-23 20:34:26,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:26,648 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:26,649 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2023-11-23 20:34:26,663 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/data/4e6ab6517/cd37253bfe87479090b10c517a5c850c/FLAG949600c28 [2023-11-23 20:34:26,684 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/data/4e6ab6517/cd37253bfe87479090b10c517a5c850c [2023-11-23 20:34:26,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:26,695 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:26,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:26,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:26,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:26,707 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:26" (1/1) ... [2023-11-23 20:34:26,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7e16bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:26, skipping insertion in model container [2023-11-23 20:34:26,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:26" (1/1) ... [2023-11-23 20:34:26,763 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:27,060 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_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3986,3999] [2023-11-23 20:34:27,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:27,086 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:27,125 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_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3986,3999] [2023-11-23 20:34:27,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:27,146 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:34:27,146 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:34:27,158 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:27,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27 WrapperNode [2023-11-23 20:34:27,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:27,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:27,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:27,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:27,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,242 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 330 [2023-11-23 20:34:27,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:27,247 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:27,247 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:27,247 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:27,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,294 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,315 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:27,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:27,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:27,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:27,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (1/1) ... [2023-11-23 20:34:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:27,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:27,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:27,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:27,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:27,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:34:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:34:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:34:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 20:34:27,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 20:34:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 20:34:27,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 20:34:27,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 20:34:27,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 20:34:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 20:34:27,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 20:34:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:34:27,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:27,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:27,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:34:27,453 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 20:34:27,679 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:27,683 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:34:28,356 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:28,924 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:28,925 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 20:34:28,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:28 BoogieIcfgContainer [2023-11-23 20:34:28,927 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:28,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:28,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:28,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:28,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:26" (1/3) ... [2023-11-23 20:34:28,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef56c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:28, skipping insertion in model container [2023-11-23 20:34:28,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:27" (2/3) ... [2023-11-23 20:34:28,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef56c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:28, skipping insertion in model container [2023-11-23 20:34:28,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:28" (3/3) ... [2023-11-23 20:34:28,978 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-11-23 20:34:28,991 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 20:34:29,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:29,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:34:29,005 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 20:34:29,110 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 20:34:29,158 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 50 transitions, 121 flow [2023-11-23 20:34:29,306 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1320 states, 1319 states have (on average 3.588324488248673) internal successors, (4733), 1319 states have internal predecessors, (4733), 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 20:34:29,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:29,333 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;@4af7499b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:29,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 20:34:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 1320 states, 1319 states have (on average 3.588324488248673) internal successors, (4733), 1319 states have internal predecessors, (4733), 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 20:34:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 20:34:29,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:29,371 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, 1, 1, 1, 1] [2023-11-23 20:34:29,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:29,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2103850129, now seen corresponding path program 1 times [2023-11-23 20:34:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:29,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452039597] [2023-11-23 20:34:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:29,727 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 20:34:29,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452039597] [2023-11-23 20:34:29,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452039597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:29,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:29,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:34:29,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784366784] [2023-11-23 20:34:29,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:34:29,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:34:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:34:29,788 INFO L87 Difference]: Start difference. First operand has 1320 states, 1319 states have (on average 3.588324488248673) internal successors, (4733), 1319 states have internal predecessors, (4733), 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 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 20:34:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:29,941 INFO L93 Difference]: Finished difference Result 1320 states and 4427 transitions. [2023-11-23 20:34:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:34:29,944 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2023-11-23 20:34:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:29,984 INFO L225 Difference]: With dead ends: 1320 [2023-11-23 20:34:29,984 INFO L226 Difference]: Without dead ends: 1320 [2023-11-23 20:34:29,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:34:29,990 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:29,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2023-11-23 20:34:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2023-11-23 20:34:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.356330553449583) internal successors, (4427), 1319 states have internal predecessors, (4427), 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 20:34:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4427 transitions. [2023-11-23 20:34:30,190 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4427 transitions. Word has length 27 [2023-11-23 20:34:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:30,191 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 4427 transitions. [2023-11-23 20:34:30,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 20:34:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4427 transitions. [2023-11-23 20:34:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:34:30,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:30,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:30,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:34:30,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:30,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash 27957403, now seen corresponding path program 1 times [2023-11-23 20:34:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18250474] [2023-11-23 20:34:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:30,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:30,510 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 20:34:30,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:30,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18250474] [2023-11-23 20:34:30,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18250474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:30,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:30,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:30,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491101647] [2023-11-23 20:34:30,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:30,516 INFO L87 Difference]: Start difference. First operand 1320 states and 4427 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 20:34:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:30,623 INFO L93 Difference]: Finished difference Result 1398 states and 4671 transitions. [2023-11-23 20:34:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2023-11-23 20:34:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:30,639 INFO L225 Difference]: With dead ends: 1398 [2023-11-23 20:34:30,639 INFO L226 Difference]: Without dead ends: 1398 [2023-11-23 20:34:30,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:30,641 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:30,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2023-11-23 20:34:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1398. [2023-11-23 20:34:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3435934144595563) internal successors, (4671), 1397 states have internal predecessors, (4671), 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 20:34:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4671 transitions. [2023-11-23 20:34:30,707 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4671 transitions. Word has length 35 [2023-11-23 20:34:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:30,708 INFO L495 AbstractCegarLoop]: Abstraction has 1398 states and 4671 transitions. [2023-11-23 20:34:30,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 20:34:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4671 transitions. [2023-11-23 20:34:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:34:30,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:30,715 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:30,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:34:30,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:30,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash -654118953, now seen corresponding path program 2 times [2023-11-23 20:34:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:30,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299804225] [2023-11-23 20:34:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:30,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:30,881 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 20:34:30,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:30,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299804225] [2023-11-23 20:34:30,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299804225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:30,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:30,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095890043] [2023-11-23 20:34:30,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:30,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:30,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:30,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:30,885 INFO L87 Difference]: Start difference. First operand 1398 states and 4671 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 20:34:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:31,021 INFO L93 Difference]: Finished difference Result 2127 states and 6942 transitions. [2023-11-23 20:34:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 35 [2023-11-23 20:34:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:31,039 INFO L225 Difference]: With dead ends: 2127 [2023-11-23 20:34:31,039 INFO L226 Difference]: Without dead ends: 1634 [2023-11-23 20:34:31,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:31,046 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:31,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 20 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2023-11-23 20:34:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1342. [2023-11-23 20:34:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.3131991051454137) internal successors, (4443), 1341 states have internal predecessors, (4443), 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 20:34:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4443 transitions. [2023-11-23 20:34:31,122 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4443 transitions. Word has length 35 [2023-11-23 20:34:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:31,122 INFO L495 AbstractCegarLoop]: Abstraction has 1342 states and 4443 transitions. [2023-11-23 20:34:31,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 20:34:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4443 transitions. [2023-11-23 20:34:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 20:34:31,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:31,133 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:31,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:34:31,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:31,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash -550194513, now seen corresponding path program 1 times [2023-11-23 20:34:31,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:31,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837516770] [2023-11-23 20:34:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:31,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:31,362 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 20:34:31,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:31,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837516770] [2023-11-23 20:34:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837516770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:31,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:31,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:31,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544645111] [2023-11-23 20:34:31,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:31,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:31,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:31,367 INFO L87 Difference]: Start difference. First operand 1342 states and 4443 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 20:34:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:31,462 INFO L93 Difference]: Finished difference Result 1222 states and 4000 transitions. [2023-11-23 20:34:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2023-11-23 20:34:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:31,475 INFO L225 Difference]: With dead ends: 1222 [2023-11-23 20:34:31,476 INFO L226 Difference]: Without dead ends: 1222 [2023-11-23 20:34:31,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:31,485 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:31,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2023-11-23 20:34:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2023-11-23 20:34:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.276003276003276) internal successors, (4000), 1221 states have internal predecessors, (4000), 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 20:34:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4000 transitions. [2023-11-23 20:34:31,548 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4000 transitions. Word has length 39 [2023-11-23 20:34:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:31,549 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 4000 transitions. [2023-11-23 20:34:31,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 20:34:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4000 transitions. [2023-11-23 20:34:31,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 20:34:31,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:31,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:31,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:34:31,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:31,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 65911103, now seen corresponding path program 2 times [2023-11-23 20:34:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:31,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638354225] [2023-11-23 20:34:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:31,836 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 20:34:31,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:31,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638354225] [2023-11-23 20:34:31,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638354225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:31,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:31,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:31,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626096849] [2023-11-23 20:34:31,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:31,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:31,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:31,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:31,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:31,841 INFO L87 Difference]: Start difference. First operand 1222 states and 4000 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 20:34:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:32,016 INFO L93 Difference]: Finished difference Result 1448 states and 4620 transitions. [2023-11-23 20:34:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2023-11-23 20:34:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:32,029 INFO L225 Difference]: With dead ends: 1448 [2023-11-23 20:34:32,029 INFO L226 Difference]: Without dead ends: 1223 [2023-11-23 20:34:32,030 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 20:34:32,033 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:32,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2023-11-23 20:34:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1223. [2023-11-23 20:34:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 3.2741407528641573) internal successors, (4001), 1222 states have internal predecessors, (4001), 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 20:34:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 4001 transitions. [2023-11-23 20:34:32,092 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 4001 transitions. Word has length 39 [2023-11-23 20:34:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:32,094 INFO L495 AbstractCegarLoop]: Abstraction has 1223 states and 4001 transitions. [2023-11-23 20:34:32,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 20:34:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 4001 transitions. [2023-11-23 20:34:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 20:34:32,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:32,101 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:32,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:34:32,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:32,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1456075125, now seen corresponding path program 1 times [2023-11-23 20:34:32,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:32,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820872456] [2023-11-23 20:34:32,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:32,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:34:32,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:32,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820872456] [2023-11-23 20:34:32,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820872456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:32,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:32,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:32,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627244758] [2023-11-23 20:34:32,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:32,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:32,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:32,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:32,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:32,453 INFO L87 Difference]: Start difference. First operand 1223 states and 4001 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 20:34:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:32,581 INFO L93 Difference]: Finished difference Result 1338 states and 4281 transitions. [2023-11-23 20:34:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:34:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 40 [2023-11-23 20:34:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:32,595 INFO L225 Difference]: With dead ends: 1338 [2023-11-23 20:34:32,595 INFO L226 Difference]: Without dead ends: 1224 [2023-11-23 20:34:32,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:32,597 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:32,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:32,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2023-11-23 20:34:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1224. [2023-11-23 20:34:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.2722812755519217) internal successors, (4002), 1223 states have internal predecessors, (4002), 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 20:34:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4002 transitions. [2023-11-23 20:34:32,657 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4002 transitions. Word has length 40 [2023-11-23 20:34:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:32,658 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 4002 transitions. [2023-11-23 20:34:32,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 20:34:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4002 transitions. [2023-11-23 20:34:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 20:34:32,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:32,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:32,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:34:32,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:32,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1459778069, now seen corresponding path program 1 times [2023-11-23 20:34:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:32,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361020166] [2023-11-23 20:34:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:32,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:32,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:32,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361020166] [2023-11-23 20:34:32,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361020166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:32,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:32,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:32,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440619718] [2023-11-23 20:34:32,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:32,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:32,992 INFO L87 Difference]: Start difference. First operand 1224 states and 4002 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 20:34:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:33,138 INFO L93 Difference]: Finished difference Result 1404 states and 4453 transitions. [2023-11-23 20:34:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:34:33,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 41 [2023-11-23 20:34:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:33,151 INFO L225 Difference]: With dead ends: 1404 [2023-11-23 20:34:33,151 INFO L226 Difference]: Without dead ends: 1225 [2023-11-23 20:34:33,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:33,153 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:33,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2023-11-23 20:34:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1225. [2023-11-23 20:34:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 3.270424836601307) internal successors, (4003), 1224 states have internal predecessors, (4003), 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 20:34:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 4003 transitions. [2023-11-23 20:34:33,209 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 4003 transitions. Word has length 41 [2023-11-23 20:34:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:33,210 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 4003 transitions. [2023-11-23 20:34:33,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 20:34:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 4003 transitions. [2023-11-23 20:34:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 20:34:33,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:33,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:33,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:34:33,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:33,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 239481483, now seen corresponding path program 1 times [2023-11-23 20:34:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:33,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385520808] [2023-11-23 20:34:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:33,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:33,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385520808] [2023-11-23 20:34:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385520808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:33,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002781142] [2023-11-23 20:34:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:33,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:33,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:33,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:34:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:33,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 20:34:33,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:34,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:34,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2023-11-23 20:34:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002781142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:34,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441486267] [2023-11-23 20:34:34,697 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 20:34:34,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:34,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-23 20:34:34,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957497276] [2023-11-23 20:34:34,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:34,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 20:34:34,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:34,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 20:34:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:34:34,707 INFO L87 Difference]: Start difference. First operand 1225 states and 4003 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 17 states have internal predecessors, (104), 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 20:34:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:35,146 INFO L93 Difference]: Finished difference Result 2255 states and 7251 transitions. [2023-11-23 20:34:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:34:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 17 states have internal predecessors, (104), 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 42 [2023-11-23 20:34:35,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:35,162 INFO L225 Difference]: With dead ends: 2255 [2023-11-23 20:34:35,162 INFO L226 Difference]: Without dead ends: 1226 [2023-11-23 20:34:35,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-11-23 20:34:35,164 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 166 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:35,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 134 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:34:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2023-11-23 20:34:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1226. [2023-11-23 20:34:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.2685714285714287) internal successors, (4004), 1225 states have internal predecessors, (4004), 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 20:34:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 4004 transitions. [2023-11-23 20:34:35,236 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 4004 transitions. Word has length 42 [2023-11-23 20:34:35,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:35,236 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 4004 transitions. [2023-11-23 20:34:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 17 states have internal predecessors, (104), 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 20:34:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 4004 transitions. [2023-11-23 20:34:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:34:35,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:35,244 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:34:35,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:35,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1753774443, now seen corresponding path program 2 times [2023-11-23 20:34:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:35,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466546958] [2023-11-23 20:34:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:36,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:36,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466546958] [2023-11-23 20:34:36,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466546958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:36,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778602205] [2023-11-23 20:34:36,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:34:36,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:36,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:36,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:36,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:34:36,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:34:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:34:36,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 20:34:36,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:34:36,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:37,007 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 20:34:37,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 20:34:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:34:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778602205] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:37,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:37,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 16 [2023-11-23 20:34:37,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119552231] [2023-11-23 20:34:37,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:34:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:34:37,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:34:37,035 INFO L87 Difference]: Start difference. First operand 1226 states and 4004 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 20:34:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:37,216 INFO L93 Difference]: Finished difference Result 2203 states and 7277 transitions. [2023-11-23 20:34:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 43 [2023-11-23 20:34:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:37,236 INFO L225 Difference]: With dead ends: 2203 [2023-11-23 20:34:37,237 INFO L226 Difference]: Without dead ends: 2203 [2023-11-23 20:34:37,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:34:37,238 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:37,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 61 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:34:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2023-11-23 20:34:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1959. [2023-11-23 20:34:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 3.298774259448417) internal successors, (6459), 1958 states have internal predecessors, (6459), 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 20:34:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 6459 transitions. [2023-11-23 20:34:37,323 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 6459 transitions. Word has length 43 [2023-11-23 20:34:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:37,324 INFO L495 AbstractCegarLoop]: Abstraction has 1959 states and 6459 transitions. [2023-11-23 20:34:37,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 20:34:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 6459 transitions. [2023-11-23 20:34:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:34:37,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:37,332 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:34:37,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:37,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:37,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:37,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash -581749855, now seen corresponding path program 3 times [2023-11-23 20:34:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:37,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007540842] [2023-11-23 20:34:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:38,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007540842] [2023-11-23 20:34:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007540842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979112116] [2023-11-23 20:34:38,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:34:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:38,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:38,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:34:39,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:34:39,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:34:39,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 20:34:39,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:39,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-23 20:34:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:40,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:40,461 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-23 20:34:40,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 59 [2023-11-23 20:34:40,478 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-23 20:34:40,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-23 20:34:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:40,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979112116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:40,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133262507] [2023-11-23 20:34:40,801 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 20:34:40,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:40,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-23 20:34:40,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191577250] [2023-11-23 20:34:40,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:40,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 20:34:40,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 20:34:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=607, Unknown=1, NotChecked=0, Total=702 [2023-11-23 20:34:40,806 INFO L87 Difference]: Start difference. First operand 1959 states and 6459 transitions. Second operand has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 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 20:34:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:43,479 INFO L93 Difference]: Finished difference Result 8510 states and 28231 transitions. [2023-11-23 20:34:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 20:34:43,481 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 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 43 [2023-11-23 20:34:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:43,545 INFO L225 Difference]: With dead ends: 8510 [2023-11-23 20:34:43,545 INFO L226 Difference]: Without dead ends: 6026 [2023-11-23 20:34:43,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=332, Invalid=1389, Unknown=1, NotChecked=0, Total=1722 [2023-11-23 20:34:43,547 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 504 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:43,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 503 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1377 Invalid, 1 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 20:34:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6026 states. [2023-11-23 20:34:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6026 to 3761. [2023-11-23 20:34:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3761 states, 3760 states have (on average 3.3414893617021275) internal successors, (12564), 3760 states have internal predecessors, (12564), 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 20:34:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 12564 transitions. [2023-11-23 20:34:43,833 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 12564 transitions. Word has length 43 [2023-11-23 20:34:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:43,834 INFO L495 AbstractCegarLoop]: Abstraction has 3761 states and 12564 transitions. [2023-11-23 20:34:43,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.185185185185185) internal successors, (113), 26 states have internal predecessors, (113), 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 20:34:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 12564 transitions. [2023-11-23 20:34:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:34:43,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:43,856 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:34:43,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:44,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 20:34:44,069 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:44,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1159911071, now seen corresponding path program 4 times [2023-11-23 20:34:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:44,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794735441] [2023-11-23 20:34:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:45,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:45,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794735441] [2023-11-23 20:34:45,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794735441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:45,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255002627] [2023-11-23 20:34:45,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 20:34:45,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:45,339 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:45,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:34:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:45,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 20:34:45,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:45,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-23 20:34:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:46,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:46,562 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-23 20:34:46,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 59 [2023-11-23 20:34:46,573 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-23 20:34:46,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-23 20:34:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:46,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255002627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881342360] [2023-11-23 20:34:46,942 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 20:34:46,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:46,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-23 20:34:46,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828131655] [2023-11-23 20:34:46,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:46,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 20:34:46,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 20:34:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=701, Unknown=1, NotChecked=0, Total=812 [2023-11-23 20:34:46,946 INFO L87 Difference]: Start difference. First operand 3761 states and 12564 transitions. Second operand has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 28 states have internal predecessors, (113), 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 20:34:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:50,645 INFO L93 Difference]: Finished difference Result 12264 states and 39998 transitions. [2023-11-23 20:34:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-23 20:34:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 28 states have internal predecessors, (113), 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 43 [2023-11-23 20:34:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:50,726 INFO L225 Difference]: With dead ends: 12264 [2023-11-23 20:34:50,726 INFO L226 Difference]: Without dead ends: 12264 [2023-11-23 20:34:50,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=579, Invalid=2725, Unknown=2, NotChecked=0, Total=3306 [2023-11-23 20:34:50,728 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 841 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:50,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 501 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1648 Invalid, 1 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 20:34:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12264 states. [2023-11-23 20:34:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12264 to 4860. [2023-11-23 20:34:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 3.397201070179049) internal successors, (16507), 4859 states have internal predecessors, (16507), 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 20:34:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 16507 transitions. [2023-11-23 20:34:51,133 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 16507 transitions. Word has length 43 [2023-11-23 20:34:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:51,134 INFO L495 AbstractCegarLoop]: Abstraction has 4860 states and 16507 transitions. [2023-11-23 20:34:51,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 28 states have internal predecessors, (113), 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 20:34:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 16507 transitions. [2023-11-23 20:34:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:34:51,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:51,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:34:51,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:51,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 20:34:51,375 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:51,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1867014089, now seen corresponding path program 5 times [2023-11-23 20:34:51,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:51,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679363401] [2023-11-23 20:34:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:51,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:34:51,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679363401] [2023-11-23 20:34:51,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679363401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:51,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:51,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:34:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702355530] [2023-11-23 20:34:51,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:51,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:51,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:51,534 INFO L87 Difference]: Start difference. First operand 4860 states and 16507 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 20:34:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:51,643 INFO L93 Difference]: Finished difference Result 3128 states and 10374 transitions. [2023-11-23 20:34:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 43 [2023-11-23 20:34:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:51,659 INFO L225 Difference]: With dead ends: 3128 [2023-11-23 20:34:51,659 INFO L226 Difference]: Without dead ends: 3128 [2023-11-23 20:34:51,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:34:51,661 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:51,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2023-11-23 20:34:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 3107. [2023-11-23 20:34:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3106 states have (on average 3.3254990341274953) internal successors, (10329), 3106 states have internal predecessors, (10329), 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 20:34:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 10329 transitions. [2023-11-23 20:34:51,789 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 10329 transitions. Word has length 43 [2023-11-23 20:34:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:51,790 INFO L495 AbstractCegarLoop]: Abstraction has 3107 states and 10329 transitions. [2023-11-23 20:34:51,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 20:34:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 10329 transitions. [2023-11-23 20:34:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:34:51,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:51,804 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:34:51,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 20:34:51,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:51,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1256600921, now seen corresponding path program 6 times [2023-11-23 20:34:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:51,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888446335] [2023-11-23 20:34:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:53,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888446335] [2023-11-23 20:34:53,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888446335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114830992] [2023-11-23 20:34:53,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:34:53,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:53,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:53,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:53,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:34:53,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:34:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:34:53,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 20:34:53,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:53,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-23 20:34:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:53,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-23 20:34:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:54,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:54,997 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-11-23 20:34:54,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 139 [2023-11-23 20:34:55,017 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-23 20:34:55,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 101 [2023-11-23 20:34:55,033 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-23 20:34:55,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 67 [2023-11-23 20:34:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:55,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114830992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:55,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280459954] [2023-11-23 20:34:55,579 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 20:34:55,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:34:55,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-11-23 20:34:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678559165] [2023-11-23 20:34:55,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:55,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 20:34:55,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:55,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 20:34:55,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=802, Unknown=3, NotChecked=0, Total=930 [2023-11-23 20:34:55,582 INFO L87 Difference]: Start difference. First operand 3107 states and 10329 transitions. Second operand has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 30 states have internal predecessors, (113), 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 20:34:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:57,925 INFO L93 Difference]: Finished difference Result 4181 states and 13431 transitions. [2023-11-23 20:34:57,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 20:34:57,925 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 30 states have internal predecessors, (113), 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 43 [2023-11-23 20:34:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:57,937 INFO L225 Difference]: With dead ends: 4181 [2023-11-23 20:34:57,938 INFO L226 Difference]: Without dead ends: 3279 [2023-11-23 20:34:57,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=352, Invalid=1537, Unknown=3, NotChecked=0, Total=1892 [2023-11-23 20:34:57,940 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 664 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 56 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:57,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 431 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1163 Invalid, 20 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 20:34:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2023-11-23 20:34:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2373. [2023-11-23 20:34:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2372 states have (on average 3.188026981450253) internal successors, (7562), 2372 states have internal predecessors, (7562), 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 20:34:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 7562 transitions. [2023-11-23 20:34:58,093 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 7562 transitions. Word has length 43 [2023-11-23 20:34:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:58,093 INFO L495 AbstractCegarLoop]: Abstraction has 2373 states and 7562 transitions. [2023-11-23 20:34:58,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 30 states have internal predecessors, (113), 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 20:34:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 7562 transitions. [2023-11-23 20:34:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:34:58,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:58,104 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:34:58,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:58,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 20:34:58,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:34:58,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1834762137, now seen corresponding path program 7 times [2023-11-23 20:34:58,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:58,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055166878] [2023-11-23 20:34:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:58,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:34:59,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:59,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055166878] [2023-11-23 20:34:59,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055166878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:59,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789424465] [2023-11-23 20:34:59,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 20:34:59,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:59,390 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:59,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:34:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:59,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 20:34:59,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:59,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:59,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-23 20:35:00,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:35:00,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-23 20:35:00,583 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-23 20:35:00,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 13 [2023-11-23 20:35:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:35:00,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:01,184 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-11-23 20:35:01,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 312 treesize of output 280 [2023-11-23 20:35:01,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:35:01,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-11-23 20:35:01,245 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 20:35:01,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2023-11-23 20:35:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:35:01,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789424465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:01,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [970913492] [2023-11-23 20:35:01,718 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 20:35:01,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:35:01,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-11-23 20:35:01,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025781018] [2023-11-23 20:35:01,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:35:01,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 20:35:01,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:01,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 20:35:01,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=811, Unknown=3, NotChecked=0, Total=930 [2023-11-23 20:35:01,723 INFO L87 Difference]: Start difference. First operand 2373 states and 7562 transitions. Second operand has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 30 states have internal predecessors, (113), 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 20:35:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:04,545 INFO L93 Difference]: Finished difference Result 3547 states and 11088 transitions. [2023-11-23 20:35:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 20:35:04,546 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 30 states have internal predecessors, (113), 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 43 [2023-11-23 20:35:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:04,559 INFO L225 Difference]: With dead ends: 3547 [2023-11-23 20:35:04,560 INFO L226 Difference]: Without dead ends: 3547 [2023-11-23 20:35:04,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=332, Invalid=1639, Unknown=9, NotChecked=0, Total=1980 [2023-11-23 20:35:04,561 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 604 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 59 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:04,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 377 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1277 Invalid, 12 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 20:35:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2023-11-23 20:35:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2241. [2023-11-23 20:35:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 3.179464285714286) internal successors, (7122), 2240 states have internal predecessors, (7122), 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 20:35:04,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 7122 transitions. [2023-11-23 20:35:04,645 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 7122 transitions. Word has length 43 [2023-11-23 20:35:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:04,645 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 7122 transitions. [2023-11-23 20:35:04,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 30 states have internal predecessors, (113), 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 20:35:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 7122 transitions. [2023-11-23 20:35:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 20:35:04,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:04,653 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:35:04,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:04,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 20:35:04,874 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-23 20:35:04,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:04,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2051825879, now seen corresponding path program 8 times [2023-11-23 20:35:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:04,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824481816] [2023-11-23 20:35:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:35:06,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:06,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824481816] [2023-11-23 20:35:06,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824481816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:06,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570518804] [2023-11-23 20:35:06,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:35:06,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:06,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:06,323 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:06,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76ca89ff-9f78-4f17-b771-91c4ee5cfbca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:35:06,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:35:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:35:06,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:35:06,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:06,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:35:06,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-23 20:35:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:35:06,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:06,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570518804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:06,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:06,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2023-11-23 20:35:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358392744] [2023-11-23 20:35:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:06,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:35:06,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:35:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:35:06,874 INFO L87 Difference]: Start difference. First operand 2241 states and 7122 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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 20:35:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:07,158 INFO L93 Difference]: Finished difference Result 2839 states and 9001 transitions. [2023-11-23 20:35:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:35:07,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 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 44 [2023-11-23 20:35:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:07,176 INFO L225 Difference]: With dead ends: 2839 [2023-11-23 20:35:07,177 INFO L226 Difference]: Without dead ends: 2839 [2023-11-23 20:35:07,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-11-23 20:35:07,179 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:07,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 56 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2023-11-23 20:35:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2056. [2023-11-23 20:35:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 3.151824817518248) internal successors, (6477), 2055 states have internal predecessors, (6477), 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 20:35:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 6477 transitions. [2023-11-23 20:35:07,304 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 6477 transitions. Word has length 44 [2023-11-23 20:35:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:07,305 INFO L495 AbstractCegarLoop]: Abstraction has 2056 states and 6477 transitions.