./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh --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 c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:23:22,329 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:23:22,394 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:23:22,398 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:23:22,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:23:22,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:23:22,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:23:22,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:23:22,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:23:22,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:23:22,427 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:23:22,427 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:23:22,428 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:23:22,428 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:23:22,429 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:23:22,429 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:23:22,430 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:23:22,431 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:23:22,431 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:23:22,432 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:23:22,432 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:23:22,433 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:23:22,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:23:22,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:23:22,435 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:23:22,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:23:22,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:23:22,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:23:22,436 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:23:22,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:23:22,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:23:22,438 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:23:22,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:23:22,438 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:23:22,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:23:22,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:23:22,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:23:22,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:23:22,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:23:22,440 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:23:22,440 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:23:22,440 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:23:22,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:23:22,441 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:23:22,441 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:23:22,441 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:23:22,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:23:22,441 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_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 [2023-12-02 15:23:22,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:23:22,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:23:22,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:23:22,713 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:23:22,714 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:23:22,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-12-02 15:23:25,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:23:25,911 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:23:25,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-12-02 15:23:25,928 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/data/3dc00079b/fa9ddb1c019d4bc5ab82563b5f43796d/FLAG32a05e3f9 [2023-12-02 15:23:25,940 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/data/3dc00079b/fa9ddb1c019d4bc5ab82563b5f43796d [2023-12-02 15:23:25,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:23:25,943 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:23:25,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:23:25,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:23:25,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:23:25,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:23:25" (1/1) ... [2023-12-02 15:23:25,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcfad30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:25, skipping insertion in model container [2023-12-02 15:23:25,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:23:25" (1/1) ... [2023-12-02 15:23:25,995 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:23:26,246 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_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-12-02 15:23:26,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:23:26,261 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:23:26,299 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_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-12-02 15:23:26,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:23:26,333 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:23:26,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26 WrapperNode [2023-12-02 15:23:26,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:23:26,334 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:23:26,334 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:23:26,334 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:23:26,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,354 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,372 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 60 [2023-12-02 15:23:26,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:23:26,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:23:26,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:23:26,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:23:26,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,384 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,394 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:23:26,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:23:26,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:23:26,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:23:26,400 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (1/1) ... [2023-12-02 15:23:26,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:23:26,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:23:26,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:23:26,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d4dd55a-cfae-4876-98dc-0b1e65e9f330/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:23:26,457 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-02 15:23:26,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-02 15:23:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:23:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:23:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:23:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:23:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:23:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:23:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:23:26,460 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 15:23:26,582 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:23:26,584 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:23:26,699 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:23:26,813 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:23:26,814 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 15:23:26,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:23:26 BoogieIcfgContainer [2023-12-02 15:23:26,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:23:26,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:23:26,818 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:23:26,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:23:26,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:23:25" (1/3) ... [2023-12-02 15:23:26,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5511bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:23:26, skipping insertion in model container [2023-12-02 15:23:26,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:23:26" (2/3) ... [2023-12-02 15:23:26,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5511bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:23:26, skipping insertion in model container [2023-12-02 15:23:26,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:23:26" (3/3) ... [2023-12-02 15:23:26,824 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-12-02 15:23:26,834 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 15:23:26,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:23:26,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:23:26,859 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 15:23:26,908 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:23:26,941 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 19 transitions, 42 flow [2023-12-02 15:23:26,962 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 52 states have (on average 2.0) internal successors, (104), 54 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) [2023-12-02 15:23:26,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:23:26,991 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;@3fa2a801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:23:26,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-02 15:23:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 52 states have (on average 2.0) internal successors, (104), 54 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) [2023-12-02 15:23:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 15:23:26,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:27,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-12-02 15:23:27,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:23:27,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1655626239, now seen corresponding path program 1 times [2023-12-02 15:23:27,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:27,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54083229] [2023-12-02 15:23:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:27,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:27,134 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 15:23:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:27,172 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 15:23:27,174 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 15:23:27,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-02 15:23:27,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-12-02 15:23:27,177 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-12-02 15:23:27,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:23:27,182 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 15:23:27,185 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 15:23:27,185 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 15:23:27,205 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:23:27,208 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 33 transitions, 76 flow [2023-12-02 15:23:27,266 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 640 states, 632 states have (on average 3.1107594936708862) internal successors, (1966), 639 states have internal predecessors, (1966), 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) [2023-12-02 15:23:27,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:23:27,269 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;@3fa2a801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:23:27,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-02 15:23:27,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 640 states, 632 states have (on average 3.1107594936708862) internal successors, (1966), 639 states have internal predecessors, (1966), 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) [2023-12-02 15:23:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:23:27,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:27,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:27,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-02 15:23:27,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash 987484591, now seen corresponding path program 1 times [2023-12-02 15:23:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:27,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699522062] [2023-12-02 15:23:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:27,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:23:27,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:27,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699522062] [2023-12-02 15:23:27,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699522062] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:27,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:27,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:27,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149348919] [2023-12-02 15:23:27,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:27,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:27,511 INFO L87 Difference]: Start difference. First operand has 640 states, 632 states have (on average 3.1107594936708862) internal successors, (1966), 639 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:27,638 INFO L93 Difference]: Finished difference Result 661 states and 1790 transitions. [2023-12-02 15:23:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:23:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:27,662 INFO L225 Difference]: With dead ends: 661 [2023-12-02 15:23:27,662 INFO L226 Difference]: Without dead ends: 661 [2023-12-02 15:23:27,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:27,666 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:27,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 49 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:23:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-12-02 15:23:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 520. [2023-12-02 15:23:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 516 states have (on average 2.798449612403101) internal successors, (1444), 519 states have internal predecessors, (1444), 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) [2023-12-02 15:23:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1444 transitions. [2023-12-02 15:23:27,753 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1444 transitions. Word has length 9 [2023-12-02 15:23:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:27,753 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 1444 transitions. [2023-12-02 15:23:27,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1444 transitions. [2023-12-02 15:23:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:23:27,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:27,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:23:27,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-02 15:23:27,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash 987485614, now seen corresponding path program 1 times [2023-12-02 15:23:27,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:27,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656635697] [2023-12-02 15:23:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:27,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:23:27,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656635697] [2023-12-02 15:23:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656635697] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:27,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:27,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119638980] [2023-12-02 15:23:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:27,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:27,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:27,844 INFO L87 Difference]: Start difference. First operand 520 states and 1444 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:27,936 INFO L93 Difference]: Finished difference Result 567 states and 1528 transitions. [2023-12-02 15:23:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:23:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:27,943 INFO L225 Difference]: With dead ends: 567 [2023-12-02 15:23:27,943 INFO L226 Difference]: Without dead ends: 567 [2023-12-02 15:23:27,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:27,945 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:27,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:23:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-02 15:23:27,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 426. [2023-12-02 15:23:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 424 states have (on average 2.7877358490566038) internal successors, (1182), 425 states have internal predecessors, (1182), 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) [2023-12-02 15:23:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1182 transitions. [2023-12-02 15:23:27,972 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1182 transitions. Word has length 9 [2023-12-02 15:23:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:27,973 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 1182 transitions. [2023-12-02 15:23:27,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1182 transitions. [2023-12-02 15:23:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:23:27,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:27,974 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2023-12-02 15:23:27,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:23:27,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-02 15:23:27,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:27,975 INFO L85 PathProgramCache]: Analyzing trace with hash 370936135, now seen corresponding path program 1 times [2023-12-02 15:23:27,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:27,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920715979] [2023-12-02 15:23:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:27,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:27,992 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 15:23:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:28,009 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 15:23:28,009 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 15:23:28,010 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-12-02 15:23:28,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-12-02 15:23:28,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-12-02 15:23:28,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-12-02 15:23:28,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:23:28,011 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 15:23:28,012 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 15:23:28,012 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 15:23:28,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:23:28,040 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 47 transitions, 112 flow [2023-12-02 15:23:28,420 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7147 states, 7128 states have (on average 4.270061728395062) internal successors, (30437), 7146 states have internal predecessors, (30437), 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) [2023-12-02 15:23:28,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:23:28,423 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;@3fa2a801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:23:28,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-02 15:23:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 7147 states, 7128 states have (on average 4.270061728395062) internal successors, (30437), 7146 states have internal predecessors, (30437), 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) [2023-12-02 15:23:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:23:28,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:28,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:28,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-02 15:23:28,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:28,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1050246315, now seen corresponding path program 1 times [2023-12-02 15:23:28,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:28,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973125181] [2023-12-02 15:23:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:28,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:23:28,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:28,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973125181] [2023-12-02 15:23:28,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973125181] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:28,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:28,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:28,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255747732] [2023-12-02 15:23:28,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:28,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:28,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:28,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:28,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:28,564 INFO L87 Difference]: Start difference. First operand has 7147 states, 7128 states have (on average 4.270061728395062) internal successors, (30437), 7146 states have internal predecessors, (30437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:28,814 INFO L93 Difference]: Finished difference Result 7283 states and 27637 transitions. [2023-12-02 15:23:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:28,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:23:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:28,910 INFO L225 Difference]: With dead ends: 7283 [2023-12-02 15:23:28,910 INFO L226 Difference]: Without dead ends: 7283 [2023-12-02 15:23:28,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:28,911 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 66 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:28,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 91 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:23:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2023-12-02 15:23:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 5723. [2023-12-02 15:23:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5715 states have (on average 3.8712160979877517) internal successors, (22124), 5722 states have internal predecessors, (22124), 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) [2023-12-02 15:23:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 22124 transitions. [2023-12-02 15:23:29,307 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 22124 transitions. Word has length 9 [2023-12-02 15:23:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:29,308 INFO L495 AbstractCegarLoop]: Abstraction has 5723 states and 22124 transitions. [2023-12-02 15:23:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 22124 transitions. [2023-12-02 15:23:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:23:29,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:29,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:29,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 15:23:29,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-02 15:23:29,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1050247338, now seen corresponding path program 1 times [2023-12-02 15:23:29,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:29,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784106455] [2023-12-02 15:23:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:23:29,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:29,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784106455] [2023-12-02 15:23:29,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784106455] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:29,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:29,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60934759] [2023-12-02 15:23:29,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:29,413 INFO L87 Difference]: Start difference. First operand 5723 states and 22124 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:29,616 INFO L93 Difference]: Finished difference Result 6243 states and 23615 transitions. [2023-12-02 15:23:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:23:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:29,680 INFO L225 Difference]: With dead ends: 6243 [2023-12-02 15:23:29,680 INFO L226 Difference]: Without dead ends: 6243 [2023-12-02 15:23:29,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:29,682 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:29,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 75 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:23:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2023-12-02 15:23:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 4683. [2023-12-02 15:23:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4679 states have (on average 3.8687753793545627) internal successors, (18102), 4682 states have internal predecessors, (18102), 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) [2023-12-02 15:23:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 18102 transitions. [2023-12-02 15:23:30,012 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 18102 transitions. Word has length 9 [2023-12-02 15:23:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:30,012 INFO L495 AbstractCegarLoop]: Abstraction has 4683 states and 18102 transitions. [2023-12-02 15:23:30,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:30,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 18102 transitions. [2023-12-02 15:23:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 15:23:30,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:30,024 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-12-02 15:23:30,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:23:30,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-02 15:23:30,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash -315337826, now seen corresponding path program 1 times [2023-12-02 15:23:30,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:30,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167695637] [2023-12-02 15:23:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:30,056 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 15:23:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:30,085 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 15:23:30,085 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 15:23:30,086 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-02 15:23:30,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-02 15:23:30,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-02 15:23:30,086 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-02 15:23:30,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-02 15:23:30,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 15:23:30,087 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 15:23:30,088 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 15:23:30,088 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-02 15:23:30,135 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:23:30,137 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 61 transitions, 150 flow [2023-12-02 15:23:33,035 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 78940 states, 78898 states have (on average 5.446538568785013) internal successors, (429721), 78939 states have internal predecessors, (429721), 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) [2023-12-02 15:23:33,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:23:33,037 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;@3fa2a801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:23:33,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-02 15:23:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 78940 states, 78898 states have (on average 5.446538568785013) internal successors, (429721), 78939 states have internal predecessors, (429721), 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) [2023-12-02 15:23:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:23:33,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:33,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:33,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-02 15:23:33,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:33,188 INFO L85 PathProgramCache]: Analyzing trace with hash 546893205, now seen corresponding path program 1 times [2023-12-02 15:23:33,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:33,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154340512] [2023-12-02 15:23:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:33,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:23:33,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:33,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154340512] [2023-12-02 15:23:33,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154340512] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:33,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:33,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:33,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365934301] [2023-12-02 15:23:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:33,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:33,353 INFO L87 Difference]: Start difference. First operand has 78940 states, 78898 states have (on average 5.446538568785013) internal successors, (429721), 78939 states have internal predecessors, (429721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:34,832 INFO L93 Difference]: Finished difference Result 80125 states and 391418 transitions. [2023-12-02 15:23:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:34,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:23:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:35,743 INFO L225 Difference]: With dead ends: 80125 [2023-12-02 15:23:35,744 INFO L226 Difference]: Without dead ends: 80125 [2023-12-02 15:23:35,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:35,746 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 92 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:35,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 133 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:23:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80125 states. [2023-12-02 15:23:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80125 to 62956. [2023-12-02 15:23:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62956 states, 62940 states have (on average 4.957737527804258) internal successors, (312040), 62955 states have internal predecessors, (312040), 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) [2023-12-02 15:23:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62956 states to 62956 states and 312040 transitions. [2023-12-02 15:23:39,225 INFO L78 Accepts]: Start accepts. Automaton has 62956 states and 312040 transitions. Word has length 9 [2023-12-02 15:23:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:39,225 INFO L495 AbstractCegarLoop]: Abstraction has 62956 states and 312040 transitions. [2023-12-02 15:23:39,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 62956 states and 312040 transitions. [2023-12-02 15:23:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:23:39,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:39,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:39,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 15:23:39,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-02 15:23:39,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:39,227 INFO L85 PathProgramCache]: Analyzing trace with hash 546894228, now seen corresponding path program 1 times [2023-12-02 15:23:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:39,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318959495] [2023-12-02 15:23:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:39,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:23:39,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318959495] [2023-12-02 15:23:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318959495] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:39,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:39,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379699216] [2023-12-02 15:23:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:39,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:39,281 INFO L87 Difference]: Start difference. First operand 62956 states and 312040 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:40,315 INFO L93 Difference]: Finished difference Result 68679 states and 334684 transitions. [2023-12-02 15:23:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:23:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:40,877 INFO L225 Difference]: With dead ends: 68679 [2023-12-02 15:23:40,878 INFO L226 Difference]: Without dead ends: 68679 [2023-12-02 15:23:40,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:40,879 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 91 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:40,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 132 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:23:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68679 states. [2023-12-02 15:23:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68679 to 51510. [2023-12-02 15:23:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51510 states, 51502 states have (on average 4.957205545415712) internal successors, (255306), 51509 states have internal predecessors, (255306), 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) [2023-12-02 15:23:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51510 states to 51510 states and 255306 transitions. [2023-12-02 15:23:43,350 INFO L78 Accepts]: Start accepts. Automaton has 51510 states and 255306 transitions. Word has length 9 [2023-12-02 15:23:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:43,350 INFO L495 AbstractCegarLoop]: Abstraction has 51510 states and 255306 transitions. [2023-12-02 15:23:43,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 51510 states and 255306 transitions. [2023-12-02 15:23:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 15:23:43,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:43,352 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:43,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 15:23:43,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-02 15:23:43,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash -135844057, now seen corresponding path program 1 times [2023-12-02 15:23:43,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:43,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284632778] [2023-12-02 15:23:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:43,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:23:43,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284632778] [2023-12-02 15:23:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284632778] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:43,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:43,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:43,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871760997] [2023-12-02 15:23:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:43,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:43,404 INFO L87 Difference]: Start difference. First operand 51510 states and 255306 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:44,407 INFO L93 Difference]: Finished difference Result 65550 states and 314283 transitions. [2023-12-02 15:23:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 15:23:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:45,148 INFO L225 Difference]: With dead ends: 65550 [2023-12-02 15:23:45,148 INFO L226 Difference]: Without dead ends: 65550 [2023-12-02 15:23:45,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:45,149 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 89 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:45,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 96 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:23:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65550 states. [2023-12-02 15:23:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65550 to 51510. [2023-12-02 15:23:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51510 states, 51502 states have (on average 4.866335287949982) internal successors, (250626), 51509 states have internal predecessors, (250626), 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) [2023-12-02 15:23:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51510 states to 51510 states and 250626 transitions. [2023-12-02 15:23:47,491 INFO L78 Accepts]: Start accepts. Automaton has 51510 states and 250626 transitions. Word has length 12 [2023-12-02 15:23:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:47,492 INFO L495 AbstractCegarLoop]: Abstraction has 51510 states and 250626 transitions. [2023-12-02 15:23:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51510 states and 250626 transitions. [2023-12-02 15:23:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 15:23:47,493 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:47,493 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:47,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 15:23:47,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-02 15:23:47,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash -135843034, now seen corresponding path program 1 times [2023-12-02 15:23:47,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:47,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576629073] [2023-12-02 15:23:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:23:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:23:47,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576629073] [2023-12-02 15:23:47,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576629073] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:23:47,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:23:47,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:23:47,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748028450] [2023-12-02 15:23:47,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:23:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:23:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:23:47,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:47,544 INFO L87 Difference]: Start difference. First operand 51510 states and 250626 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:23:48,570 INFO L93 Difference]: Finished difference Result 56190 states and 268725 transitions. [2023-12-02 15:23:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:23:48,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 15:23:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:23:48,886 INFO L225 Difference]: With dead ends: 56190 [2023-12-02 15:23:48,886 INFO L226 Difference]: Without dead ends: 56190 [2023-12-02 15:23:48,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:23:48,887 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 83 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:23:48,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 114 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:23:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56190 states. [2023-12-02 15:23:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56190 to 42150. [2023-12-02 15:23:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42150 states, 42146 states have (on average 4.865657476391591) internal successors, (205068), 42149 states have internal predecessors, (205068), 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) [2023-12-02 15:23:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42150 states to 42150 states and 205068 transitions. [2023-12-02 15:23:51,148 INFO L78 Accepts]: Start accepts. Automaton has 42150 states and 205068 transitions. Word has length 12 [2023-12-02 15:23:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:23:51,148 INFO L495 AbstractCegarLoop]: Abstraction has 42150 states and 205068 transitions. [2023-12-02 15:23:51,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:23:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 42150 states and 205068 transitions. [2023-12-02 15:23:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:23:51,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:23:51,151 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-12-02 15:23:51,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 15:23:51,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-02 15:23:51,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:23:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1585694516, now seen corresponding path program 1 times [2023-12-02 15:23:51,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:23:51,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496319875] [2023-12-02 15:23:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:23:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:23:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:51,164 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 15:23:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 15:23:51,179 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 15:23:51,179 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 15:23:51,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-12-02 15:23:51,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-12-02 15:23:51,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-12-02 15:23:51,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-12-02 15:23:51,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-12-02 15:23:51,181 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-12-02 15:23:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 15:23:51,181 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-02 15:23:51,182 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 15:23:51,182 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-02 15:23:51,215 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 15:23:51,217 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 75 transitions, 190 flow [2023-12-02 15:24:30,540 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 869311 states, 869222 states have (on average 6.62750137479263) internal successors, (5760770), 869310 states have internal predecessors, (5760770), 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) [2023-12-02 15:24:30,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:24:30,541 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;@3fa2a801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:24:30,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-02 15:24:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 869311 states, 869222 states have (on average 6.62750137479263) internal successors, (5760770), 869310 states have internal predecessors, (5760770), 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) [2023-12-02 15:24:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:24:34,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:24:34,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:24:34,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-02 15:24:34,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:24:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1676329523, now seen corresponding path program 1 times [2023-12-02 15:24:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:24:34,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653196033] [2023-12-02 15:24:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:24:34,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:24:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:24:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:24:34,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:24:34,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653196033] [2023-12-02 15:24:34,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653196033] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:24:34,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:24:34,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:24:34,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768998784] [2023-12-02 15:24:34,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:24:34,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:24:34,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:24:34,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:24:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:24:36,606 INFO L87 Difference]: Start difference. First operand has 869311 states, 869222 states have (on average 6.62750137479263) internal successors, (5760770), 869310 states have internal predecessors, (5760770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:24:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:24:53,641 INFO L93 Difference]: Finished difference Result 881387 states and 5267113 transitions. [2023-12-02 15:24:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:24:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 15:24:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:25:05,759 INFO L225 Difference]: With dead ends: 881387 [2023-12-02 15:25:05,759 INFO L226 Difference]: Without dead ends: 881387 [2023-12-02 15:25:05,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:25:05,759 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 123 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:25:05,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 146 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:25:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881387 states.