./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:07:55,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:07:55,326 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:07:55,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:07:55,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:07:55,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:07:55,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:07:55,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:07:55,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:07:55,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:07:55,384 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:07:55,385 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:07:55,385 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:07:55,387 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:07:55,388 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:07:55,388 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:07:55,389 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:07:55,389 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:07:55,390 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:07:55,390 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:07:55,391 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:07:55,392 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:07:55,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:07:55,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:07:55,394 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:07:55,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:07:55,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:07:55,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:07:55,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:07:55,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:07:55,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:07:55,398 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:07:55,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:07:55,399 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:07:55,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:07:55,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:07:55,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:07:55,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:07:55,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:07:55,401 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:07:55,401 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:07:55,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:07:55,402 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:07:55,402 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:07:55,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:07:55,403 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_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81809963fcaff21fd6241cde97e522447f695a8b323a0a16c5a31b7f82b0f683 [2023-11-06 21:07:55,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:07:55,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:07:55,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:07:55,811 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:07:55,811 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:07:55,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2023-11-06 21:07:58,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:07:59,207 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:07:59,214 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/sv-benchmarks/c/pthread/triangular-longest-1.i [2023-11-06 21:07:59,237 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/data/1f77cf732/d3a2e6397f654c298f23e79a0e8f8473/FLAGfcb605777 [2023-11-06 21:07:59,254 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/data/1f77cf732/d3a2e6397f654c298f23e79a0e8f8473 [2023-11-06 21:07:59,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:07:59,264 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:07:59,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:07:59,270 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:07:59,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:07:59,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a084b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59, skipping insertion in model container [2023-11-06 21:07:59,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,345 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:07:59,745 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2023-11-06 21:07:59,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:07:59,762 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:07:59,833 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_21069322-474b-44b8-8828-ba7fbed5cefb/sv-benchmarks/c/pthread/triangular-longest-1.i[30962,30975] [2023-11-06 21:07:59,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:07:59,878 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:07:59,878 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:07:59,886 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:07:59,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59 WrapperNode [2023-11-06 21:07:59,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:07:59,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:07:59,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:07:59,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:07:59,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,915 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,936 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-11-06 21:07:59,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:07:59,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:07:59,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:07:59,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:07:59,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,962 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:07:59,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:07:59,993 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:07:59,993 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:07:59,993 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:07:59,994 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (1/1) ... [2023-11-06 21:08:00,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:08:00,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:00,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:08:00,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:08:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 21:08:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 21:08:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 21:08:00,067 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 21:08:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:08:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:08:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:08:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:08:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:08:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:08:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:08:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:08:00,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:08:00,070 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:08:00,201 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:08:00,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:08:00,424 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:08:00,431 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:08:00,431 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:08:00,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:00 BoogieIcfgContainer [2023-11-06 21:08:00,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:08:00,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:08:00,437 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:08:00,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:08:00,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:07:59" (1/3) ... [2023-11-06 21:08:00,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2569271f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:08:00, skipping insertion in model container [2023-11-06 21:08:00,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:07:59" (2/3) ... [2023-11-06 21:08:00,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2569271f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:08:00, skipping insertion in model container [2023-11-06 21:08:00,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:00" (3/3) ... [2023-11-06 21:08:00,460 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2023-11-06 21:08:00,476 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:08:00,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:08:00,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:08:00,487 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:08:00,579 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 21:08:00,612 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 21:08:00,626 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 69 transitions, 146 flow [2023-11-06 21:08:00,629 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 69 transitions, 146 flow [2023-11-06 21:08:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 146 flow [2023-11-06 21:08:00,693 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-06 21:08:00,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:08:00,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 67 events. 5/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-11-06 21:08:00,704 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-11-06 21:08:03,061 INFO L134 LiptonReduction]: Checked pairs total: 1198 [2023-11-06 21:08:03,061 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-11-06 21:08:03,072 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 40 flow [2023-11-06 21:08:03,095 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:03,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:08:03,127 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7ed4e972, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:08:03,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 21:08:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:08:03,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:03,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:08:03,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:03,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash -482396297, now seen corresponding path program 1 times [2023-11-06 21:08:03,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:03,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508042913] [2023-11-06 21:08:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:03,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:03,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:03,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508042913] [2023-11-06 21:08:03,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508042913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:03,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:03,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:08:03,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788551288] [2023-11-06 21:08:03,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:08:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:08:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:08:03,748 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 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, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:03,844 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2023-11-06 21:08:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:08:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-06 21:08:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:03,859 INFO L225 Difference]: With dead ends: 60 [2023-11-06 21:08:03,859 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 21:08:03,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:03,866 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:03,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 21:08:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-11-06 21:08:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2023-11-06 21:08:03,916 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2023-11-06 21:08:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:03,919 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2023-11-06 21:08:03,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2023-11-06 21:08:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 21:08:03,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:03,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:03,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:08:03,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:03,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash 300364745, now seen corresponding path program 1 times [2023-11-06 21:08:03,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:03,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997011285] [2023-11-06 21:08:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:03,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:04,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:04,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997011285] [2023-11-06 21:08:04,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997011285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:04,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:04,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:08:04,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604085248] [2023-11-06 21:08:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:04,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:08:04,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:04,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:08:04,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:04,105 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:04,167 INFO L93 Difference]: Finished difference Result 56 states and 134 transitions. [2023-11-06 21:08:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:08:04,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2023-11-06 21:08:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:04,169 INFO L225 Difference]: With dead ends: 56 [2023-11-06 21:08:04,170 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 21:08:04,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:08:04,172 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:04,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 21:08:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2023-11-06 21:08:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2023-11-06 21:08:04,180 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 8 [2023-11-06 21:08:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:04,181 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2023-11-06 21:08:04,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2023-11-06 21:08:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 21:08:04,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:04,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:04,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:08:04,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:04,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash 273611900, now seen corresponding path program 1 times [2023-11-06 21:08:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:04,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471762124] [2023-11-06 21:08:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:04,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:04,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:04,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471762124] [2023-11-06 21:08:04,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471762124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:04,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:08:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815080380] [2023-11-06 21:08:04,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:04,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:08:04,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:08:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:04,297 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:04,391 INFO L93 Difference]: Finished difference Result 82 states and 192 transitions. [2023-11-06 21:08:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:08:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2023-11-06 21:08:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:04,397 INFO L225 Difference]: With dead ends: 82 [2023-11-06 21:08:04,398 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 21:08:04,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:08:04,401 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:04,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 21:08:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2023-11-06 21:08:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2023-11-06 21:08:04,421 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 8 [2023-11-06 21:08:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:04,421 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2023-11-06 21:08:04,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2023-11-06 21:08:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 21:08:04,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:04,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:04,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:08:04,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:04,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 273250130, now seen corresponding path program 2 times [2023-11-06 21:08:04,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803516166] [2023-11-06 21:08:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:04,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803516166] [2023-11-06 21:08:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803516166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:04,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:04,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:08:04,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750885725] [2023-11-06 21:08:04,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:04,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:08:04,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:08:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:04,600 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:04,689 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2023-11-06 21:08:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:08:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2023-11-06 21:08:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:04,693 INFO L225 Difference]: With dead ends: 62 [2023-11-06 21:08:04,694 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 21:08:04,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:08:04,697 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:04,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 21:08:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2023-11-06 21:08:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2023-11-06 21:08:04,717 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2023-11-06 21:08:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:04,718 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2023-11-06 21:08:04,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2023-11-06 21:08:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:08:04,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:04,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:04,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:08:04,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:04,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:04,722 INFO L85 PathProgramCache]: Analyzing trace with hash 869793032, now seen corresponding path program 1 times [2023-11-06 21:08:04,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:04,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826025718] [2023-11-06 21:08:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:04,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:04,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826025718] [2023-11-06 21:08:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826025718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:04,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:08:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327070955] [2023-11-06 21:08:04,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:04,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:08:04,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:08:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:08:04,938 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:05,051 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2023-11-06 21:08:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:08:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2023-11-06 21:08:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:05,053 INFO L225 Difference]: With dead ends: 58 [2023-11-06 21:08:05,054 INFO L226 Difference]: Without dead ends: 51 [2023-11-06 21:08:05,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:08:05,056 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:05,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-06 21:08:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-06 21:08:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2023-11-06 21:08:05,069 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2023-11-06 21:08:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:05,070 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2023-11-06 21:08:05,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2023-11-06 21:08:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:08:05,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:05,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:05,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:08:05,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:05,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash 858591182, now seen corresponding path program 2 times [2023-11-06 21:08:05,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:05,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135146788] [2023-11-06 21:08:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:05,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:05,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:05,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135146788] [2023-11-06 21:08:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135146788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:08:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923278425] [2023-11-06 21:08:05,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:05,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:08:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:08:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:08:05,240 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:05,346 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2023-11-06 21:08:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:08:05,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2023-11-06 21:08:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:05,348 INFO L225 Difference]: With dead ends: 62 [2023-11-06 21:08:05,348 INFO L226 Difference]: Without dead ends: 56 [2023-11-06 21:08:05,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:08:05,349 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:05,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-06 21:08:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-11-06 21:08:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2023-11-06 21:08:05,354 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 10 [2023-11-06 21:08:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:05,355 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2023-11-06 21:08:05,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2023-11-06 21:08:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:08:05,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:05,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:05,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:08:05,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:05,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:05,358 INFO L85 PathProgramCache]: Analyzing trace with hash 858735332, now seen corresponding path program 3 times [2023-11-06 21:08:05,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:05,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485499367] [2023-11-06 21:08:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:05,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:05,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485499367] [2023-11-06 21:08:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485499367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:05,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:05,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:08:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39878102] [2023-11-06 21:08:05,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:05,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:08:05,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:08:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:08:05,490 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:05,632 INFO L93 Difference]: Finished difference Result 62 states and 150 transitions. [2023-11-06 21:08:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:08:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 10 [2023-11-06 21:08:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:05,634 INFO L225 Difference]: With dead ends: 62 [2023-11-06 21:08:05,634 INFO L226 Difference]: Without dead ends: 46 [2023-11-06 21:08:05,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:08:05,636 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:05,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-06 21:08:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2023-11-06 21:08:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2023-11-06 21:08:05,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2023-11-06 21:08:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:05,642 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2023-11-06 21:08:05,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2023-11-06 21:08:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:08:05,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:05,649 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:05,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:08:05,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:05,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1193636419, now seen corresponding path program 4 times [2023-11-06 21:08:05,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:05,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801593222] [2023-11-06 21:08:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:05,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:05,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801593222] [2023-11-06 21:08:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801593222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069142853] [2023-11-06 21:08:05,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:08:05,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:05,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:05,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:08:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:06,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:08:06,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:06,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:06,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069142853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:06,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8559516] [2023-11-06 21:08:06,306 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:06,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:06,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 21:08:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419070260] [2023-11-06 21:08:06,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:06,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:08:06,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:08:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:08:06,312 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:06,571 INFO L93 Difference]: Finished difference Result 70 states and 157 transitions. [2023-11-06 21:08:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:08:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:08:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:06,573 INFO L225 Difference]: With dead ends: 70 [2023-11-06 21:08:06,573 INFO L226 Difference]: Without dead ends: 52 [2023-11-06 21:08:06,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:08:06,574 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:06,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:08:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-06 21:08:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2023-11-06 21:08:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.404255319148936) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 113 transitions. [2023-11-06 21:08:06,579 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 113 transitions. Word has length 11 [2023-11-06 21:08:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:06,580 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 113 transitions. [2023-11-06 21:08:06,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 113 transitions. [2023-11-06 21:08:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:08:06,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:06,581 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:06,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:06,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:06,787 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:06,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 845975449, now seen corresponding path program 5 times [2023-11-06 21:08:06,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:06,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244354209] [2023-11-06 21:08:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:06,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:06,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:06,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244354209] [2023-11-06 21:08:06,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244354209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324576431] [2023-11-06 21:08:06,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:08:06,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:06,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:06,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:06,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:08:07,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:08:07,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:07,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:08:07,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:07,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324576431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:07,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502468865] [2023-11-06 21:08:07,219 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:07,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:07,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 21:08:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670297265] [2023-11-06 21:08:07,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:08:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:08:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:08:07,222 INFO L87 Difference]: Start difference. First operand 48 states and 113 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:07,527 INFO L93 Difference]: Finished difference Result 95 states and 217 transitions. [2023-11-06 21:08:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:08:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:08:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:07,529 INFO L225 Difference]: With dead ends: 95 [2023-11-06 21:08:07,529 INFO L226 Difference]: Without dead ends: 68 [2023-11-06 21:08:07,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:08:07,530 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:07,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-06 21:08:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2023-11-06 21:08:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.48) internal successors, (124), 50 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 124 transitions. [2023-11-06 21:08:07,535 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 124 transitions. Word has length 11 [2023-11-06 21:08:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:07,535 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 124 transitions. [2023-11-06 21:08:07,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 124 transitions. [2023-11-06 21:08:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:08:07,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:07,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:07,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:07,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:07,748 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:07,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1647502867, now seen corresponding path program 6 times [2023-11-06 21:08:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:07,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090726374] [2023-11-06 21:08:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:07,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:07,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:07,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090726374] [2023-11-06 21:08:07,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090726374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:07,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884995970] [2023-11-06 21:08:07,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:08:07,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:07,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:07,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:07,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:08:07,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:08:07,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:07,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:08:07,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:08,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:08,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884995970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:08,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315803773] [2023-11-06 21:08:08,228 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:08,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:08,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 21:08:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753370740] [2023-11-06 21:08:08,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:08,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:08:08,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:08:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:08:08,232 INFO L87 Difference]: Start difference. First operand 51 states and 124 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:08,490 INFO L93 Difference]: Finished difference Result 86 states and 194 transitions. [2023-11-06 21:08:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:08:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 [2023-11-06 21:08:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:08,491 INFO L225 Difference]: With dead ends: 86 [2023-11-06 21:08:08,491 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 21:08:08,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:08:08,492 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:08,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 21:08:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2023-11-06 21:08:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2023-11-06 21:08:08,497 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 12 [2023-11-06 21:08:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:08,497 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2023-11-06 21:08:08,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2023-11-06 21:08:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:08:08,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:08,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:08,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:08,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:08:08,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:08,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 610949321, now seen corresponding path program 7 times [2023-11-06 21:08:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054809614] [2023-11-06 21:08:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:08,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:08,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:08,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054809614] [2023-11-06 21:08:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054809614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:08,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700647807] [2023-11-06 21:08:08,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:08:08,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:08,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:08,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:08:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:08,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:08:08,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:08,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700647807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065424341] [2023-11-06 21:08:09,126 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:09,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:09,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 21:08:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555349976] [2023-11-06 21:08:09,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:08:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:08:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:08:09,129 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:09,472 INFO L93 Difference]: Finished difference Result 108 states and 245 transitions. [2023-11-06 21:08:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:08:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 21:08:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:09,474 INFO L225 Difference]: With dead ends: 108 [2023-11-06 21:08:09,474 INFO L226 Difference]: Without dead ends: 81 [2023-11-06 21:08:09,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:08:09,475 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:09,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:08:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-06 21:08:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2023-11-06 21:08:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.450980392156863) internal successors, (125), 51 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 125 transitions. [2023-11-06 21:08:09,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 125 transitions. Word has length 12 [2023-11-06 21:08:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:09,480 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 125 transitions. [2023-11-06 21:08:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 125 transitions. [2023-11-06 21:08:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 21:08:09,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:09,481 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:09,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:09,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:09,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1773083626, now seen corresponding path program 8 times [2023-11-06 21:08:09,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:09,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670981281] [2023-11-06 21:08:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:09,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670981281] [2023-11-06 21:08:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670981281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365030569] [2023-11-06 21:08:09,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:08:09,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:09,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:09,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:08:09,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:08:09,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:09,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:08:09,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:09,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:10,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365030569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:10,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [609255863] [2023-11-06 21:08:10,098 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:10,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:10,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 21:08:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239593349] [2023-11-06 21:08:10,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:10,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:08:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:08:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:08:10,101 INFO L87 Difference]: Start difference. First operand 52 states and 125 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:10,691 INFO L93 Difference]: Finished difference Result 135 states and 321 transitions. [2023-11-06 21:08:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:08:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 21:08:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:10,693 INFO L225 Difference]: With dead ends: 135 [2023-11-06 21:08:10,693 INFO L226 Difference]: Without dead ends: 86 [2023-11-06 21:08:10,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:08:10,695 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 133 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:10,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 0 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:08:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-06 21:08:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2023-11-06 21:08:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2023-11-06 21:08:10,700 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 13 [2023-11-06 21:08:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:10,700 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2023-11-06 21:08:10,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2023-11-06 21:08:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 21:08:10,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:10,702 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:10,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:10,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:10,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:10,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1512898163, now seen corresponding path program 9 times [2023-11-06 21:08:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:10,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781604706] [2023-11-06 21:08:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:11,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781604706] [2023-11-06 21:08:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781604706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025657279] [2023-11-06 21:08:11,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:08:11,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:11,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:11,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:11,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:08:11,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:08:11,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:11,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:08:11,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:11,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:11,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025657279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:11,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22751732] [2023-11-06 21:08:11,537 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:11,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 21:08:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374326661] [2023-11-06 21:08:11,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:08:11,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:08:11,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:08:11,544 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:12,364 INFO L93 Difference]: Finished difference Result 165 states and 404 transitions. [2023-11-06 21:08:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:08:12,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 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 17 [2023-11-06 21:08:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:12,366 INFO L225 Difference]: With dead ends: 165 [2023-11-06 21:08:12,366 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 21:08:12,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1105, Invalid=2435, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 21:08:12,368 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 270 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:12,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 0 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:08:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 21:08:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 64. [2023-11-06 21:08:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2023-11-06 21:08:12,372 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 17 [2023-11-06 21:08:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:12,372 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2023-11-06 21:08:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2023-11-06 21:08:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:08:12,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:12,374 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:12,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:12,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:12,580 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:12,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:12,580 INFO L85 PathProgramCache]: Analyzing trace with hash -547402813, now seen corresponding path program 10 times [2023-11-06 21:08:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:12,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897855043] [2023-11-06 21:08:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:13,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:13,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897855043] [2023-11-06 21:08:13,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897855043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:13,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933170449] [2023-11-06 21:08:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:08:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:13,097 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:13,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:08:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:13,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:08:13,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:13,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933170449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [96092211] [2023-11-06 21:08:13,948 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:13,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:13,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-11-06 21:08:13,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315083218] [2023-11-06 21:08:13,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:13,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 21:08:13,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 21:08:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:08:13,953 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:15,055 INFO L93 Difference]: Finished difference Result 181 states and 394 transitions. [2023-11-06 21:08:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 21:08:15,055 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-06 21:08:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:15,057 INFO L225 Difference]: With dead ends: 181 [2023-11-06 21:08:15,057 INFO L226 Difference]: Without dead ends: 120 [2023-11-06 21:08:15,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1745, Invalid=3805, Unknown=0, NotChecked=0, Total=5550 [2023-11-06 21:08:15,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 358 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:15,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:08:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-06 21:08:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2023-11-06 21:08:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.3434343434343434) internal successors, (232), 99 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 232 transitions. [2023-11-06 21:08:15,066 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 232 transitions. Word has length 26 [2023-11-06 21:08:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:15,067 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 232 transitions. [2023-11-06 21:08:15,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 232 transitions. [2023-11-06 21:08:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:08:15,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:15,069 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:15,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:15,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:08:15,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:15,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1784354733, now seen corresponding path program 11 times [2023-11-06 21:08:15,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:15,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153228435] [2023-11-06 21:08:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:15,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:15,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153228435] [2023-11-06 21:08:15,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153228435] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:15,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854872829] [2023-11-06 21:08:15,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:08:15,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:15,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:15,780 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:15,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:08:15,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 21:08:15,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:15,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:08:15,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:16,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854872829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045357117] [2023-11-06 21:08:16,673 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:16,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:16,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-11-06 21:08:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016029267] [2023-11-06 21:08:16,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 21:08:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 21:08:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1274, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 21:08:16,678 INFO L87 Difference]: Start difference. First operand 100 states and 232 transitions. Second operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:17,892 INFO L93 Difference]: Finished difference Result 266 states and 567 transitions. [2023-11-06 21:08:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 21:08:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-06 21:08:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:17,899 INFO L225 Difference]: With dead ends: 266 [2023-11-06 21:08:17,899 INFO L226 Difference]: Without dead ends: 203 [2023-11-06 21:08:17,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1897, Invalid=4745, Unknown=0, NotChecked=0, Total=6642 [2023-11-06 21:08:17,904 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 359 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:17,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 0 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:08:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-06 21:08:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 103. [2023-11-06 21:08:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.3627450980392157) internal successors, (241), 102 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 241 transitions. [2023-11-06 21:08:17,911 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 241 transitions. Word has length 26 [2023-11-06 21:08:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:17,912 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 241 transitions. [2023-11-06 21:08:17,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 241 transitions. [2023-11-06 21:08:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:08:17,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:17,913 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:17,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:18,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:08:18,120 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:18,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash 413081473, now seen corresponding path program 12 times [2023-11-06 21:08:18,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:18,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986193634] [2023-11-06 21:08:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:18,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:18,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:18,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986193634] [2023-11-06 21:08:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986193634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:18,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294344911] [2023-11-06 21:08:18,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:08:18,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:18,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:18,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:08:18,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:08:18,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:18,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:08:18,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:18,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294344911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680274477] [2023-11-06 21:08:19,479 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:19,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:19,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-11-06 21:08:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693082197] [2023-11-06 21:08:19,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 21:08:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 21:08:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 21:08:19,483 INFO L87 Difference]: Start difference. First operand 103 states and 241 transitions. Second operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:20,852 INFO L93 Difference]: Finished difference Result 312 states and 671 transitions. [2023-11-06 21:08:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-06 21:08:20,853 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-06 21:08:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:20,857 INFO L225 Difference]: With dead ends: 312 [2023-11-06 21:08:20,857 INFO L226 Difference]: Without dead ends: 245 [2023-11-06 21:08:20,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2124, Invalid=5886, Unknown=0, NotChecked=0, Total=8010 [2023-11-06 21:08:20,861 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 358 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:20,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 0 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:08:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-06 21:08:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 108. [2023-11-06 21:08:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.457943925233645) internal successors, (263), 107 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 263 transitions. [2023-11-06 21:08:20,868 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 263 transitions. Word has length 26 [2023-11-06 21:08:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:20,869 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 263 transitions. [2023-11-06 21:08:20,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 263 transitions. [2023-11-06 21:08:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:08:20,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:20,870 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:20,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 21:08:21,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:08:21,076 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:21,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1547312675, now seen corresponding path program 13 times [2023-11-06 21:08:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:21,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137442814] [2023-11-06 21:08:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:21,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:21,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137442814] [2023-11-06 21:08:21,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137442814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:21,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704911737] [2023-11-06 21:08:21,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:08:21,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:21,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:21,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:21,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:08:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:21,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:08:21,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:21,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:08:22,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704911737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:22,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628263695] [2023-11-06 21:08:22,136 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:22,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:22,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-11-06 21:08:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825532240] [2023-11-06 21:08:22,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:22,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 21:08:22,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 21:08:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 21:08:22,139 INFO L87 Difference]: Start difference. First operand 108 states and 263 transitions. Second operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:24,206 INFO L93 Difference]: Finished difference Result 326 states and 769 transitions. [2023-11-06 21:08:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-06 21:08:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-06 21:08:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:24,213 INFO L225 Difference]: With dead ends: 326 [2023-11-06 21:08:24,213 INFO L226 Difference]: Without dead ends: 220 [2023-11-06 21:08:24,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3536 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3144, Invalid=7986, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 21:08:24,219 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 698 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:24,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 0 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:08:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-06 21:08:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 100. [2023-11-06 21:08:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.4444444444444446) internal successors, (242), 99 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 242 transitions. [2023-11-06 21:08:24,232 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 242 transitions. Word has length 26 [2023-11-06 21:08:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:24,233 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 242 transitions. [2023-11-06 21:08:24,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 242 transitions. [2023-11-06 21:08:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 21:08:24,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:24,236 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:24,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:24,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:08:24,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 21:08:24,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1774134056, now seen corresponding path program 14 times [2023-11-06 21:08:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:24,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752525232] [2023-11-06 21:08:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:25,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752525232] [2023-11-06 21:08:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752525232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:25,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545033466] [2023-11-06 21:08:25,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:08:25,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:25,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:25,085 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:25,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21069322-474b-44b8-8828-ba7fbed5cefb/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:08:25,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-06 21:08:25,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:25,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:08:25,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:25,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:25,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545033466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:25,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028127230] [2023-11-06 21:08:25,960 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 21:08:25,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:25,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2023-11-06 21:08:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083029026] [2023-11-06 21:08:25,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:25,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-06 21:08:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-06 21:08:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=1577, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 21:08:25,964 INFO L87 Difference]: Start difference. First operand 100 states and 242 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 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)