./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:51,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:51,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:03:51,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:51,463 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:51,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:51,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:51,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:51,492 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:51,492 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:51,493 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:51,494 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:51,494 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:51,495 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:51,496 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:51,496 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:51,497 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:51,498 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:51,499 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:51,499 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:51,500 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:51,501 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:51,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:51,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:51,503 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:51,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:51,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:51,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:51,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:51,506 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:51,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:51,507 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:51,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:51,508 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:51,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:51,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:51,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:51,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:51,510 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:51,510 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:51,511 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:51,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:51,511 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:51,512 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:51,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:51,513 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_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c31f1603fd15e011308b2e8fcd1cd45b23f0b00ac0b8b466c4f212460081639c [2023-11-12 01:03:51,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:51,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:51,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:51,817 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:51,818 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:51,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-12 01:03:55,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:55,281 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:55,281 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/sv-benchmarks/c/weaver/mult-dist.wvr.c [2023-11-12 01:03:55,292 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/data/f391592fa/a1c9ca9beba74e58b04f6912f432c339/FLAGcefcaa4fb [2023-11-12 01:03:55,307 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/data/f391592fa/a1c9ca9beba74e58b04f6912f432c339 [2023-11-12 01:03:55,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:55,312 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:55,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:55,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:55,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:55,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78675378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55, skipping insertion in model container [2023-11-12 01:03:55,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,349 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:55,535 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_036ffae9-9d87-478d-99e6-a7a1106ef01b/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2023-11-12 01:03:55,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:55,550 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:55,576 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_036ffae9-9d87-478d-99e6-a7a1106ef01b/sv-benchmarks/c/weaver/mult-dist.wvr.c[2155,2168] [2023-11-12 01:03:55,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:55,592 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:55,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55 WrapperNode [2023-11-12 01:03:55,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:55,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:55,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:55,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:55,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,627 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-12 01:03:55,628 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:55,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:55,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:55,629 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:55,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,653 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:55,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:55,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:55,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:55,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (1/1) ... [2023-11-12 01:03:55,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:55,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:55,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:55,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:55,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 01:03:55,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 01:03:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 01:03:55,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 01:03:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 01:03:55,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 01:03:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:03:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:03:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:55,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:03:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:03:55,753 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 01:03:55,949 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:55,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:56,229 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:56,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:56,238 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 01:03:56,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:56 BoogieIcfgContainer [2023-11-12 01:03:56,241 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:56,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:56,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:56,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:56,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:55" (1/3) ... [2023-11-12 01:03:56,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c026938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:56, skipping insertion in model container [2023-11-12 01:03:56,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:55" (2/3) ... [2023-11-12 01:03:56,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c026938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:56, skipping insertion in model container [2023-11-12 01:03:56,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:56" (3/3) ... [2023-11-12 01:03:56,259 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2023-11-12 01:03:56,271 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 01:03:56,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:56,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:03:56,283 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 01:03:56,428 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 01:03:56,475 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 01:03:56,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 245 flow [2023-11-12 01:03:56,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 245 flow [2023-11-12 01:03:56,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 245 flow [2023-11-12 01:03:56,613 INFO L124 PetriNetUnfolderBase]: 7/109 cut-off events. [2023-11-12 01:03:56,613 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 01:03:56,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 109 events. 7/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-11-12 01:03:56,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-12 01:04:00,140 INFO L134 LiptonReduction]: Checked pairs total: 1718 [2023-11-12 01:04:00,141 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-12 01:04:00,151 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 73 flow [2023-11-12 01:04:00,189 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 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) [2023-11-12 01:04:00,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:04:00,217 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@638d0e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:04:00,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 01:04:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 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) [2023-11-12 01:04:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 01:04:00,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:00,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:00,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:00,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:00,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1034489384, now seen corresponding path program 1 times [2023-11-12 01:04:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:00,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779994446] [2023-11-12 01:04:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:01,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:01,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779994446] [2023-11-12 01:04:01,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779994446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:01,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:01,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 01:04:01,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554768575] [2023-11-12 01:04:01,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:01,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:04:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:04:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:04:01,220 INFO L87 Difference]: Start difference. First operand has 106 states, 105 states have (on average 3.0952380952380953) internal successors, (325), 105 states have internal predecessors, (325), 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 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:01,362 INFO L93 Difference]: Finished difference Result 203 states and 630 transitions. [2023-11-12 01:04:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:04:01,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 01:04:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:01,386 INFO L225 Difference]: With dead ends: 203 [2023-11-12 01:04:01,386 INFO L226 Difference]: Without dead ends: 196 [2023-11-12 01:04:01,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:04:01,393 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:01,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-12 01:04:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-12 01:04:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 195 states have internal predecessors, (612), 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) [2023-11-12 01:04:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 612 transitions. [2023-11-12 01:04:01,477 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 612 transitions. Word has length 19 [2023-11-12 01:04:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:01,480 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 612 transitions. [2023-11-12 01:04:01,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 612 transitions. [2023-11-12 01:04:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:01,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:01,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:01,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:04:01,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:01,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash 433928212, now seen corresponding path program 1 times [2023-11-12 01:04:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082834120] [2023-11-12 01:04:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:01,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082834120] [2023-11-12 01:04:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082834120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:01,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120301622] [2023-11-12 01:04:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:01,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:01,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:01,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:01,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:04:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:02,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:02,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:02,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120301622] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:02,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:04:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 16 [2023-11-12 01:04:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795220993] [2023-11-12 01:04:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:02,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:04:02,712 INFO L87 Difference]: Start difference. First operand 196 states and 612 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:03,050 INFO L93 Difference]: Finished difference Result 294 states and 950 transitions. [2023-11-12 01:04:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:04:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:03,056 INFO L225 Difference]: With dead ends: 294 [2023-11-12 01:04:03,056 INFO L226 Difference]: Without dead ends: 294 [2023-11-12 01:04:03,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-11-12 01:04:03,058 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:03,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-12 01:04:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 214. [2023-11-12 01:04:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.2535211267605635) internal successors, (693), 213 states have internal predecessors, (693), 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) [2023-11-12 01:04:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 693 transitions. [2023-11-12 01:04:03,094 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 693 transitions. Word has length 20 [2023-11-12 01:04:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:03,095 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 693 transitions. [2023-11-12 01:04:03,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 693 transitions. [2023-11-12 01:04:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:03,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:03,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:03,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:03,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:03,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:03,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash 396478042, now seen corresponding path program 2 times [2023-11-12 01:04:03,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:03,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004898825] [2023-11-12 01:04:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:03,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:03,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004898825] [2023-11-12 01:04:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004898825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:03,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580310245] [2023-11-12 01:04:03,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:03,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:03,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:03,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:03,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:04:03,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:04:03,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:03,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:04:03,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:04,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580310245] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:04,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:04:04,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-12 01:04:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944263838] [2023-11-12 01:04:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:04,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:04:04,398 INFO L87 Difference]: Start difference. First operand 214 states and 693 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:04,745 INFO L93 Difference]: Finished difference Result 302 states and 968 transitions. [2023-11-12 01:04:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:04:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:04,750 INFO L225 Difference]: With dead ends: 302 [2023-11-12 01:04:04,750 INFO L226 Difference]: Without dead ends: 302 [2023-11-12 01:04:04,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:04:04,752 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:04,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-12 01:04:04,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 212. [2023-11-12 01:04:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.227488151658768) internal successors, (681), 211 states have internal predecessors, (681), 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) [2023-11-12 01:04:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 681 transitions. [2023-11-12 01:04:04,784 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 681 transitions. Word has length 20 [2023-11-12 01:04:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:04,784 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 681 transitions. [2023-11-12 01:04:04,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:04,785 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 681 transitions. [2023-11-12 01:04:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:04,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:04,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:04,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:04,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:04,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:04,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:04,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1115403468, now seen corresponding path program 3 times [2023-11-12 01:04:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889893008] [2023-11-12 01:04:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:05,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:05,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889893008] [2023-11-12 01:04:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889893008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077734211] [2023-11-12 01:04:05,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:04:05,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:05,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:05,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:05,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:04:05,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:04:05,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:05,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 01:04:05,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:05,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077734211] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:06,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:04:06,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-11-12 01:04:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358177313] [2023-11-12 01:04:06,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:06,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:06,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:06,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:04:06,613 INFO L87 Difference]: Start difference. First operand 212 states and 681 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:07,130 INFO L93 Difference]: Finished difference Result 414 states and 1312 transitions. [2023-11-12 01:04:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:04:07,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:07,136 INFO L225 Difference]: With dead ends: 414 [2023-11-12 01:04:07,137 INFO L226 Difference]: Without dead ends: 414 [2023-11-12 01:04:07,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:04:07,143 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:07,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:04:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-12 01:04:07,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 210. [2023-11-12 01:04:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 3.2200956937799043) internal successors, (673), 209 states have internal predecessors, (673), 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) [2023-11-12 01:04:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 673 transitions. [2023-11-12 01:04:07,172 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 673 transitions. Word has length 20 [2023-11-12 01:04:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:07,172 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 673 transitions. [2023-11-12 01:04:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 673 transitions. [2023-11-12 01:04:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:07,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:07,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:07,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:07,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:07,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:07,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash 726185708, now seen corresponding path program 4 times [2023-11-12 01:04:07,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:07,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261357452] [2023-11-12 01:04:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:07,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:07,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261357452] [2023-11-12 01:04:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261357452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875854433] [2023-11-12 01:04:07,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:04:07,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:07,638 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:07,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:04:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:07,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:07,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:07,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875854433] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:08,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:04:08,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-11-12 01:04:08,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370108578] [2023-11-12 01:04:08,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:08,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:08,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:04:08,164 INFO L87 Difference]: Start difference. First operand 210 states and 673 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:08,411 INFO L93 Difference]: Finished difference Result 334 states and 1072 transitions. [2023-11-12 01:04:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:04:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:08,416 INFO L225 Difference]: With dead ends: 334 [2023-11-12 01:04:08,416 INFO L226 Difference]: Without dead ends: 334 [2023-11-12 01:04:08,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:04:08,418 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:08,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-12 01:04:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2023-11-12 01:04:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.3076923076923075) internal successors, (731), 221 states have internal predecessors, (731), 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) [2023-11-12 01:04:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 731 transitions. [2023-11-12 01:04:08,433 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 731 transitions. Word has length 20 [2023-11-12 01:04:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:08,433 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 731 transitions. [2023-11-12 01:04:08,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 731 transitions. [2023-11-12 01:04:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:08,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:08,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:08,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:08,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:08,651 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:08,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash 688735538, now seen corresponding path program 5 times [2023-11-12 01:04:08,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:08,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699171667] [2023-11-12 01:04:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:08,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699171667] [2023-11-12 01:04:08,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699171667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807695175] [2023-11-12 01:04:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:08,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:08,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:08,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:04:09,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:04:09,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:09,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:09,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:09,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:09,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807695175] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:09,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:04:09,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-11-12 01:04:09,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978185670] [2023-11-12 01:04:09,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:09,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:09,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:04:09,496 INFO L87 Difference]: Start difference. First operand 222 states and 731 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:09,776 INFO L93 Difference]: Finished difference Result 336 states and 1076 transitions. [2023-11-12 01:04:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:04:09,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:09,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:09,780 INFO L225 Difference]: With dead ends: 336 [2023-11-12 01:04:09,780 INFO L226 Difference]: Without dead ends: 336 [2023-11-12 01:04:09,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:04:09,782 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:09,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-12 01:04:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 216. [2023-11-12 01:04:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.2511627906976743) internal successors, (699), 215 states have internal predecessors, (699), 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) [2023-11-12 01:04:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 699 transitions. [2023-11-12 01:04:09,799 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 699 transitions. Word has length 20 [2023-11-12 01:04:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:09,799 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 699 transitions. [2023-11-12 01:04:09,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 699 transitions. [2023-11-12 01:04:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:09,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:09,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:09,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:10,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:10,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:10,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:10,008 INFO L85 PathProgramCache]: Analyzing trace with hash 718455310, now seen corresponding path program 6 times [2023-11-12 01:04:10,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:10,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732408275] [2023-11-12 01:04:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:10,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:10,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:10,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732408275] [2023-11-12 01:04:10,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732408275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856490579] [2023-11-12 01:04:10,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:04:10,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:10,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:10,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:04:10,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:04:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:10,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 01:04:10,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:10,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856490579] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:10,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:04:10,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2023-11-12 01:04:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607007208] [2023-11-12 01:04:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:10,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:04:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:04:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:04:10,668 INFO L87 Difference]: Start difference. First operand 216 states and 699 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:11,042 INFO L93 Difference]: Finished difference Result 438 states and 1388 transitions. [2023-11-12 01:04:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:04:11,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:11,047 INFO L225 Difference]: With dead ends: 438 [2023-11-12 01:04:11,047 INFO L226 Difference]: Without dead ends: 438 [2023-11-12 01:04:11,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:04:11,049 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:11,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-12 01:04:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 206. [2023-11-12 01:04:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 3.2878048780487803) internal successors, (674), 205 states have internal predecessors, (674), 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) [2023-11-12 01:04:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 674 transitions. [2023-11-12 01:04:11,061 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 674 transitions. Word has length 20 [2023-11-12 01:04:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:11,063 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 674 transitions. [2023-11-12 01:04:11,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 674 transitions. [2023-11-12 01:04:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:11,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:11,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:11,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:11,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:11,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:11,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:11,277 INFO L85 PathProgramCache]: Analyzing trace with hash 729597720, now seen corresponding path program 7 times [2023-11-12 01:04:11,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:11,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730243581] [2023-11-12 01:04:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:11,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:11,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730243581] [2023-11-12 01:04:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730243581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872303586] [2023-11-12 01:04:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:04:11,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:11,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:11,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:04:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:11,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:11,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:11,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:12,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872303586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715096179] [2023-11-12 01:04:12,079 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:12,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:12,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-12 01:04:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636103044] [2023-11-12 01:04:12,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 01:04:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:12,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 01:04:12,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:04:12,085 INFO L87 Difference]: Start difference. First operand 206 states and 674 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:12,907 INFO L93 Difference]: Finished difference Result 424 states and 1592 transitions. [2023-11-12 01:04:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 01:04:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:12,913 INFO L225 Difference]: With dead ends: 424 [2023-11-12 01:04:12,913 INFO L226 Difference]: Without dead ends: 424 [2023-11-12 01:04:12,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-11-12 01:04:12,915 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:12,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:04:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-12 01:04:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 258. [2023-11-12 01:04:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.5525291828793772) internal successors, (913), 257 states have internal predecessors, (913), 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) [2023-11-12 01:04:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 913 transitions. [2023-11-12 01:04:12,932 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 913 transitions. Word has length 20 [2023-11-12 01:04:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:12,932 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 913 transitions. [2023-11-12 01:04:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 913 transitions. [2023-11-12 01:04:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:12,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:12,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:12,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:13,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:13,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash 692147550, now seen corresponding path program 8 times [2023-11-12 01:04:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:13,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818617303] [2023-11-12 01:04:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:13,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:13,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818617303] [2023-11-12 01:04:13,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818617303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:13,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916422402] [2023-11-12 01:04:13,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:13,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:13,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 01:04:13,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:04:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:13,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:13,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:13,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:13,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916422402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:13,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792985733] [2023-11-12 01:04:13,852 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:13,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-11-12 01:04:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086943212] [2023-11-12 01:04:13,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:13,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 01:04:13,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 01:04:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:04:13,859 INFO L87 Difference]: Start difference. First operand 258 states and 913 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 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) [2023-11-12 01:04:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:14,701 INFO L93 Difference]: Finished difference Result 442 states and 1629 transitions. [2023-11-12 01:04:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 01:04:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:14,707 INFO L225 Difference]: With dead ends: 442 [2023-11-12 01:04:14,707 INFO L226 Difference]: Without dead ends: 442 [2023-11-12 01:04:14,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-11-12 01:04:14,709 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:14,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 01:04:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-11-12 01:04:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 252. [2023-11-12 01:04:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.50996015936255) internal successors, (881), 251 states have internal predecessors, (881), 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) [2023-11-12 01:04:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 881 transitions. [2023-11-12 01:04:14,730 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 881 transitions. Word has length 20 [2023-11-12 01:04:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:14,731 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 881 transitions. [2023-11-12 01:04:14,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 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) [2023-11-12 01:04:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 881 transitions. [2023-11-12 01:04:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:14,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:14,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:14,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:14,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:14,972 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:14,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:14,972 INFO L85 PathProgramCache]: Analyzing trace with hash -819733960, now seen corresponding path program 9 times [2023-11-12 01:04:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:14,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001604324] [2023-11-12 01:04:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:15,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:15,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001604324] [2023-11-12 01:04:15,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001604324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:15,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279600212] [2023-11-12 01:04:15,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:04:15,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:15,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:15,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:15,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 01:04:15,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:04:15,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:15,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 01:04:15,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:15,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:16,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279600212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:16,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61698190] [2023-11-12 01:04:16,119 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:16,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:16,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-11-12 01:04:16,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283479984] [2023-11-12 01:04:16,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:16,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:04:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:04:16,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:04:16,123 INFO L87 Difference]: Start difference. First operand 252 states and 881 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:17,128 INFO L93 Difference]: Finished difference Result 546 states and 1911 transitions. [2023-11-12 01:04:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 01:04:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:17,134 INFO L225 Difference]: With dead ends: 546 [2023-11-12 01:04:17,135 INFO L226 Difference]: Without dead ends: 546 [2023-11-12 01:04:17,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-12 01:04:17,136 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:17,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 01:04:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-11-12 01:04:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 260. [2023-11-12 01:04:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.552123552123552) internal successors, (920), 259 states have internal predecessors, (920), 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) [2023-11-12 01:04:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 920 transitions. [2023-11-12 01:04:17,153 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 920 transitions. Word has length 20 [2023-11-12 01:04:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:17,153 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 920 transitions. [2023-11-12 01:04:17,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 920 transitions. [2023-11-12 01:04:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:17,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:17,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:17,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:17,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 01:04:17,356 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:17,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1116845877, now seen corresponding path program 1 times [2023-11-12 01:04:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:17,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700519794] [2023-11-12 01:04:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:17,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700519794] [2023-11-12 01:04:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700519794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:17,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:17,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310791057] [2023-11-12 01:04:17,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:17,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:17,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:17,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:17,606 INFO L87 Difference]: Start difference. First operand 260 states and 920 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:17,962 INFO L93 Difference]: Finished difference Result 386 states and 1362 transitions. [2023-11-12 01:04:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:04:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:17,966 INFO L225 Difference]: With dead ends: 386 [2023-11-12 01:04:17,967 INFO L226 Difference]: Without dead ends: 386 [2023-11-12 01:04:17,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:04:17,968 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:17,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-12 01:04:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 282. [2023-11-12 01:04:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.597864768683274) internal successors, (1011), 281 states have internal predecessors, (1011), 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) [2023-11-12 01:04:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 1011 transitions. [2023-11-12 01:04:17,988 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 1011 transitions. Word has length 20 [2023-11-12 01:04:17,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:17,990 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 1011 transitions. [2023-11-12 01:04:17,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 1011 transitions. [2023-11-12 01:04:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:17,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:17,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:17,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 01:04:17,993 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:17,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -979435059, now seen corresponding path program 2 times [2023-11-12 01:04:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242114260] [2023-11-12 01:04:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:18,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242114260] [2023-11-12 01:04:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242114260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:18,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:18,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511432640] [2023-11-12 01:04:18,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:18,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:18,303 INFO L87 Difference]: Start difference. First operand 282 states and 1011 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:18,507 INFO L93 Difference]: Finished difference Result 318 states and 1153 transitions. [2023-11-12 01:04:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:18,511 INFO L225 Difference]: With dead ends: 318 [2023-11-12 01:04:18,511 INFO L226 Difference]: Without dead ends: 318 [2023-11-12 01:04:18,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:18,512 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:18,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-12 01:04:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 286. [2023-11-12 01:04:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.624561403508772) internal successors, (1033), 285 states have internal predecessors, (1033), 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) [2023-11-12 01:04:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 1033 transitions. [2023-11-12 01:04:18,526 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 1033 transitions. Word has length 20 [2023-11-12 01:04:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:18,526 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 1033 transitions. [2023-11-12 01:04:18,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 1033 transitions. [2023-11-12 01:04:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:18,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:18,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:18,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 01:04:18,529 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:18,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1210668631, now seen corresponding path program 3 times [2023-11-12 01:04:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:18,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507051551] [2023-11-12 01:04:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:18,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507051551] [2023-11-12 01:04:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507051551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:18,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:18,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:18,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194206762] [2023-11-12 01:04:18,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:18,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:18,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:18,730 INFO L87 Difference]: Start difference. First operand 286 states and 1033 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:18,898 INFO L93 Difference]: Finished difference Result 312 states and 1137 transitions. [2023-11-12 01:04:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:18,902 INFO L225 Difference]: With dead ends: 312 [2023-11-12 01:04:18,902 INFO L226 Difference]: Without dead ends: 312 [2023-11-12 01:04:18,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:18,903 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:18,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-12 01:04:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 282. [2023-11-12 01:04:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.622775800711744) internal successors, (1018), 281 states have internal predecessors, (1018), 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) [2023-11-12 01:04:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 1018 transitions. [2023-11-12 01:04:18,945 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 1018 transitions. Word has length 20 [2023-11-12 01:04:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:18,946 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 1018 transitions. [2023-11-12 01:04:18,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 1018 transitions. [2023-11-12 01:04:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:18,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:18,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:18,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 01:04:18,948 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:18,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -520726579, now seen corresponding path program 4 times [2023-11-12 01:04:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306529151] [2023-11-12 01:04:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:19,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:19,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306529151] [2023-11-12 01:04:19,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306529151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:19,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:19,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:19,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561483908] [2023-11-12 01:04:19,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:19,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:19,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:19,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:19,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:19,146 INFO L87 Difference]: Start difference. First operand 282 states and 1018 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:19,515 INFO L93 Difference]: Finished difference Result 402 states and 1402 transitions. [2023-11-12 01:04:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:04:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:19,520 INFO L225 Difference]: With dead ends: 402 [2023-11-12 01:04:19,520 INFO L226 Difference]: Without dead ends: 402 [2023-11-12 01:04:19,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:04:19,521 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:19,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-12 01:04:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 294. [2023-11-12 01:04:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.631399317406143) internal successors, (1064), 293 states have internal predecessors, (1064), 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) [2023-11-12 01:04:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1064 transitions. [2023-11-12 01:04:19,536 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1064 transitions. Word has length 20 [2023-11-12 01:04:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:19,537 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 1064 transitions. [2023-11-12 01:04:19,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1064 transitions. [2023-11-12 01:04:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:19,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:19,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:19,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 01:04:19,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:19,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1080445659, now seen corresponding path program 5 times [2023-11-12 01:04:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314657660] [2023-11-12 01:04:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:19,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:19,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:19,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314657660] [2023-11-12 01:04:19,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314657660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:19,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:19,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:19,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7569138] [2023-11-12 01:04:19,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:19,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:19,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:19,713 INFO L87 Difference]: Start difference. First operand 294 states and 1064 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:19,917 INFO L93 Difference]: Finished difference Result 326 states and 1174 transitions. [2023-11-12 01:04:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:19,921 INFO L225 Difference]: With dead ends: 326 [2023-11-12 01:04:19,921 INFO L226 Difference]: Without dead ends: 326 [2023-11-12 01:04:19,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:19,922 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:19,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-12 01:04:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 298. [2023-11-12 01:04:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.6464646464646466) internal successors, (1083), 297 states have internal predecessors, (1083), 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) [2023-11-12 01:04:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 1083 transitions. [2023-11-12 01:04:19,936 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 1083 transitions. Word has length 20 [2023-11-12 01:04:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:19,937 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 1083 transitions. [2023-11-12 01:04:19,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 1083 transitions. [2023-11-12 01:04:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:19,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:19,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 01:04:19,939 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:19,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1938130897, now seen corresponding path program 6 times [2023-11-12 01:04:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366146456] [2023-11-12 01:04:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:20,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:20,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366146456] [2023-11-12 01:04:20,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366146456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:20,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:20,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650277632] [2023-11-12 01:04:20,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:20,147 INFO L87 Difference]: Start difference. First operand 298 states and 1083 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:20,394 INFO L93 Difference]: Finished difference Result 320 states and 1151 transitions. [2023-11-12 01:04:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:20,399 INFO L225 Difference]: With dead ends: 320 [2023-11-12 01:04:20,399 INFO L226 Difference]: Without dead ends: 316 [2023-11-12 01:04:20,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:04:20,400 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:20,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-12 01:04:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 298. [2023-11-12 01:04:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.632996632996633) internal successors, (1079), 297 states have internal predecessors, (1079), 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) [2023-11-12 01:04:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 1079 transitions. [2023-11-12 01:04:20,419 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 1079 transitions. Word has length 20 [2023-11-12 01:04:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:20,420 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 1079 transitions. [2023-11-12 01:04:20,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 1079 transitions. [2023-11-12 01:04:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:20,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:20,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 01:04:20,423 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1317110594, now seen corresponding path program 1 times [2023-11-12 01:04:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562802906] [2023-11-12 01:04:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:20,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:20,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:20,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562802906] [2023-11-12 01:04:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562802906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:20,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482525196] [2023-11-12 01:04:20,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:20,666 INFO L87 Difference]: Start difference. First operand 298 states and 1079 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:20,892 INFO L93 Difference]: Finished difference Result 322 states and 1149 transitions. [2023-11-12 01:04:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:20,896 INFO L225 Difference]: With dead ends: 322 [2023-11-12 01:04:20,896 INFO L226 Difference]: Without dead ends: 316 [2023-11-12 01:04:20,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:20,897 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:20,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-12 01:04:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 298. [2023-11-12 01:04:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.6195286195286194) internal successors, (1075), 297 states have internal predecessors, (1075), 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) [2023-11-12 01:04:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 1075 transitions. [2023-11-12 01:04:20,913 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 1075 transitions. Word has length 20 [2023-11-12 01:04:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:20,914 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 1075 transitions. [2023-11-12 01:04:20,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 1075 transitions. [2023-11-12 01:04:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:20,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:20,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:20,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 01:04:20,917 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:20,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1219942908, now seen corresponding path program 2 times [2023-11-12 01:04:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506310732] [2023-11-12 01:04:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:20,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:21,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:21,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506310732] [2023-11-12 01:04:21,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506310732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:21,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020068717] [2023-11-12 01:04:21,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:21,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:21,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:21,137 INFO L87 Difference]: Start difference. First operand 298 states and 1075 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:21,387 INFO L93 Difference]: Finished difference Result 336 states and 1163 transitions. [2023-11-12 01:04:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:21,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:21,391 INFO L225 Difference]: With dead ends: 336 [2023-11-12 01:04:21,391 INFO L226 Difference]: Without dead ends: 316 [2023-11-12 01:04:21,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:21,392 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:21,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-12 01:04:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 294. [2023-11-12 01:04:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.583617747440273) internal successors, (1050), 293 states have internal predecessors, (1050), 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) [2023-11-12 01:04:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1050 transitions. [2023-11-12 01:04:21,405 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1050 transitions. Word has length 20 [2023-11-12 01:04:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:21,406 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 1050 transitions. [2023-11-12 01:04:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1050 transitions. [2023-11-12 01:04:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:21,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:21,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:21,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 01:04:21,408 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:21,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -916654224, now seen corresponding path program 10 times [2023-11-12 01:04:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315228866] [2023-11-12 01:04:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:21,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:21,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315228866] [2023-11-12 01:04:21,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315228866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:21,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858350346] [2023-11-12 01:04:21,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:04:21,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:21,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:21,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 01:04:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:21,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:21,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:21,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:22,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858350346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:22,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297881756] [2023-11-12 01:04:22,139 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:22,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:22,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-11-12 01:04:22,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963416719] [2023-11-12 01:04:22,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:22,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 01:04:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 01:04:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:04:22,142 INFO L87 Difference]: Start difference. First operand 294 states and 1050 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:22,833 INFO L93 Difference]: Finished difference Result 416 states and 1581 transitions. [2023-11-12 01:04:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 01:04:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:22,838 INFO L225 Difference]: With dead ends: 416 [2023-11-12 01:04:22,838 INFO L226 Difference]: Without dead ends: 416 [2023-11-12 01:04:22,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:04:22,839 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:22,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:04:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-12 01:04:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 316. [2023-11-12 01:04:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.742857142857143) internal successors, (1179), 315 states have internal predecessors, (1179), 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) [2023-11-12 01:04:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1179 transitions. [2023-11-12 01:04:22,854 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1179 transitions. Word has length 20 [2023-11-12 01:04:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:22,855 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 1179 transitions. [2023-11-12 01:04:22,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1179 transitions. [2023-11-12 01:04:22,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:22,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:22,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:22,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:23,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:23,063 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:23,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash -954104394, now seen corresponding path program 11 times [2023-11-12 01:04:23,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:23,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799942941] [2023-11-12 01:04:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:23,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:23,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799942941] [2023-11-12 01:04:23,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799942941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:23,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947952694] [2023-11-12 01:04:23,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:23,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:23,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:23,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:23,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 01:04:23,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:04:23,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:23,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:23,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:23,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947952694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1880230063] [2023-11-12 01:04:23,779 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:23,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:23,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-11-12 01:04:23,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611465021] [2023-11-12 01:04:23,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:23,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 01:04:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 01:04:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:04:23,781 INFO L87 Difference]: Start difference. First operand 316 states and 1179 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2023-11-12 01:04:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:24,391 INFO L93 Difference]: Finished difference Result 428 states and 1604 transitions. [2023-11-12 01:04:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 01:04:24,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:24,396 INFO L225 Difference]: With dead ends: 428 [2023-11-12 01:04:24,396 INFO L226 Difference]: Without dead ends: 428 [2023-11-12 01:04:24,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:04:24,397 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:24,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:04:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-11-12 01:04:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 306. [2023-11-12 01:04:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.698360655737705) internal successors, (1128), 305 states have internal predecessors, (1128), 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) [2023-11-12 01:04:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1128 transitions. [2023-11-12 01:04:24,413 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1128 transitions. Word has length 20 [2023-11-12 01:04:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:24,413 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 1128 transitions. [2023-11-12 01:04:24,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2023-11-12 01:04:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1128 transitions. [2023-11-12 01:04:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:24,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:24,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:24,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:24,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:24,622 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:24,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1506194739, now seen corresponding path program 7 times [2023-11-12 01:04:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:24,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683878086] [2023-11-12 01:04:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:24,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:24,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683878086] [2023-11-12 01:04:24,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683878086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:24,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:24,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:24,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992545010] [2023-11-12 01:04:24,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:24,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:24,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:24,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:24,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:24,796 INFO L87 Difference]: Start difference. First operand 306 states and 1128 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:24,980 INFO L93 Difference]: Finished difference Result 336 states and 1247 transitions. [2023-11-12 01:04:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:24,985 INFO L225 Difference]: With dead ends: 336 [2023-11-12 01:04:24,985 INFO L226 Difference]: Without dead ends: 336 [2023-11-12 01:04:24,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:24,992 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:24,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-12 01:04:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 312. [2023-11-12 01:04:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.739549839228296) internal successors, (1163), 311 states have internal predecessors, (1163), 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) [2023-11-12 01:04:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 1163 transitions. [2023-11-12 01:04:25,007 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 1163 transitions. Word has length 20 [2023-11-12 01:04:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:25,009 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 1163 transitions. [2023-11-12 01:04:25,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 1163 transitions. [2023-11-12 01:04:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:25,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:25,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:25,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-12 01:04:25,012 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:25,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash 683908951, now seen corresponding path program 8 times [2023-11-12 01:04:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134330091] [2023-11-12 01:04:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:25,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:25,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134330091] [2023-11-12 01:04:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134330091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:25,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:25,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:25,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64779582] [2023-11-12 01:04:25,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:25,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:25,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:25,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:25,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:25,225 INFO L87 Difference]: Start difference. First operand 312 states and 1163 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:25,440 INFO L93 Difference]: Finished difference Result 330 states and 1231 transitions. [2023-11-12 01:04:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:25,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:25,444 INFO L225 Difference]: With dead ends: 330 [2023-11-12 01:04:25,444 INFO L226 Difference]: Without dead ends: 330 [2023-11-12 01:04:25,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:25,445 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:25,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-12 01:04:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 306. [2023-11-12 01:04:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.698360655737705) internal successors, (1128), 305 states have internal predecessors, (1128), 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) [2023-11-12 01:04:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1128 transitions. [2023-11-12 01:04:25,458 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1128 transitions. Word has length 20 [2023-11-12 01:04:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:25,458 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 1128 transitions. [2023-11-12 01:04:25,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1128 transitions. [2023-11-12 01:04:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:25,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:25,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:25,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-12 01:04:25,460 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:25,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:25,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1640645235, now seen corresponding path program 9 times [2023-11-12 01:04:25,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:25,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162497112] [2023-11-12 01:04:25,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:25,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:25,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162497112] [2023-11-12 01:04:25,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162497112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:25,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275571537] [2023-11-12 01:04:25,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:25,653 INFO L87 Difference]: Start difference. First operand 306 states and 1128 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:25,866 INFO L93 Difference]: Finished difference Result 334 states and 1227 transitions. [2023-11-12 01:04:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:25,870 INFO L225 Difference]: With dead ends: 334 [2023-11-12 01:04:25,870 INFO L226 Difference]: Without dead ends: 334 [2023-11-12 01:04:25,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:25,871 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:25,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-12 01:04:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 310. [2023-11-12 01:04:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.6990291262135924) internal successors, (1143), 309 states have internal predecessors, (1143), 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) [2023-11-12 01:04:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1143 transitions. [2023-11-12 01:04:25,885 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1143 transitions. Word has length 20 [2023-11-12 01:04:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:25,885 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 1143 transitions. [2023-11-12 01:04:25,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1143 transitions. [2023-11-12 01:04:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:25,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:25,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-12 01:04:25,888 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:25,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:25,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1796636823, now seen corresponding path program 10 times [2023-11-12 01:04:25,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:25,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893365503] [2023-11-12 01:04:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:26,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:26,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893365503] [2023-11-12 01:04:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893365503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:26,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:26,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009973424] [2023-11-12 01:04:26,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:26,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:26,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:26,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:26,076 INFO L87 Difference]: Start difference. First operand 310 states and 1143 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:26,261 INFO L93 Difference]: Finished difference Result 328 states and 1204 transitions. [2023-11-12 01:04:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:26,266 INFO L225 Difference]: With dead ends: 328 [2023-11-12 01:04:26,266 INFO L226 Difference]: Without dead ends: 324 [2023-11-12 01:04:26,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:26,267 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:26,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-12 01:04:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 306. [2023-11-12 01:04:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.698360655737705) internal successors, (1128), 305 states have internal predecessors, (1128), 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) [2023-11-12 01:04:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1128 transitions. [2023-11-12 01:04:26,283 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1128 transitions. Word has length 20 [2023-11-12 01:04:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:26,284 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 1128 transitions. [2023-11-12 01:04:26,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1128 transitions. [2023-11-12 01:04:26,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:26,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:26,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:26,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-12 01:04:26,287 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:26,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1270823690, now seen corresponding path program 12 times [2023-11-12 01:04:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:26,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068010099] [2023-11-12 01:04:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:26,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:26,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:26,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068010099] [2023-11-12 01:04:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068010099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920072222] [2023-11-12 01:04:26,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:04:26,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:26,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:26,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 01:04:26,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:04:26,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:26,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 01:04:26,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:26,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920072222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911387192] [2023-11-12 01:04:27,154 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:27,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:27,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-12 01:04:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818620763] [2023-11-12 01:04:27,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:27,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 01:04:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 01:04:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-11-12 01:04:27,158 INFO L87 Difference]: Start difference. First operand 306 states and 1128 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2023-11-12 01:04:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:28,540 INFO L93 Difference]: Finished difference Result 688 states and 2355 transitions. [2023-11-12 01:04:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-12 01:04:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:28,547 INFO L225 Difference]: With dead ends: 688 [2023-11-12 01:04:28,547 INFO L226 Difference]: Without dead ends: 688 [2023-11-12 01:04:28,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 01:04:28,549 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:28,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 01:04:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-11-12 01:04:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 316. [2023-11-12 01:04:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.7111111111111112) internal successors, (1169), 315 states have internal predecessors, (1169), 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) [2023-11-12 01:04:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1169 transitions. [2023-11-12 01:04:28,569 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1169 transitions. Word has length 20 [2023-11-12 01:04:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:28,569 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 1169 transitions. [2023-11-12 01:04:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2023-11-12 01:04:28,570 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1169 transitions. [2023-11-12 01:04:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:28,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:28,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:28,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:28,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-12 01:04:28,778 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:28,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1817415585, now seen corresponding path program 11 times [2023-11-12 01:04:28,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:28,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114033472] [2023-11-12 01:04:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:28,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:29,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:29,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114033472] [2023-11-12 01:04:29,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114033472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216874351] [2023-11-12 01:04:29,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:29,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:29,047 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:29,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 01:04:29,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:04:29,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:29,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 01:04:29,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:29,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:29,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216874351] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:29,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:04:29,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 14 [2023-11-12 01:04:29,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974397367] [2023-11-12 01:04:29,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:29,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:29,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:29,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:29,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:04:29,531 INFO L87 Difference]: Start difference. First operand 316 states and 1169 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:29,754 INFO L93 Difference]: Finished difference Result 390 states and 1383 transitions. [2023-11-12 01:04:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:04:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:29,762 INFO L225 Difference]: With dead ends: 390 [2023-11-12 01:04:29,762 INFO L226 Difference]: Without dead ends: 390 [2023-11-12 01:04:29,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-11-12 01:04:29,764 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:29,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-12 01:04:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 324. [2023-11-12 01:04:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.7554179566563466) internal successors, (1213), 323 states have internal predecessors, (1213), 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) [2023-11-12 01:04:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1213 transitions. [2023-11-12 01:04:29,785 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1213 transitions. Word has length 20 [2023-11-12 01:04:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:29,785 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 1213 transitions. [2023-11-12 01:04:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1213 transitions. [2023-11-12 01:04:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:29,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:29,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:29,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:29,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:29,993 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:29,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:29,994 INFO L85 PathProgramCache]: Analyzing trace with hash 970374477, now seen corresponding path program 12 times [2023-11-12 01:04:29,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:29,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740272524] [2023-11-12 01:04:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:29,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:30,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:30,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740272524] [2023-11-12 01:04:30,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740272524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:30,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:30,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:30,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639117713] [2023-11-12 01:04:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:30,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:30,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:30,243 INFO L87 Difference]: Start difference. First operand 324 states and 1213 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:30,409 INFO L93 Difference]: Finished difference Result 342 states and 1274 transitions. [2023-11-12 01:04:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:30,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:30,413 INFO L225 Difference]: With dead ends: 342 [2023-11-12 01:04:30,414 INFO L226 Difference]: Without dead ends: 338 [2023-11-12 01:04:30,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:30,414 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:30,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-12 01:04:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 324. [2023-11-12 01:04:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.7492260061919507) internal successors, (1211), 323 states have internal predecessors, (1211), 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) [2023-11-12 01:04:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1211 transitions. [2023-11-12 01:04:30,427 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1211 transitions. Word has length 20 [2023-11-12 01:04:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:30,428 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 1211 transitions. [2023-11-12 01:04:30,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1211 transitions. [2023-11-12 01:04:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:30,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:30,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:30,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-12 01:04:30,430 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:30,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2026861488, now seen corresponding path program 13 times [2023-11-12 01:04:30,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:30,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654417416] [2023-11-12 01:04:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:30,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:30,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:30,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654417416] [2023-11-12 01:04:30,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654417416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:30,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:30,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390488030] [2023-11-12 01:04:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:30,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:30,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:30,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:30,619 INFO L87 Difference]: Start difference. First operand 324 states and 1211 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:30,756 INFO L93 Difference]: Finished difference Result 340 states and 1270 transitions. [2023-11-12 01:04:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:30,760 INFO L225 Difference]: With dead ends: 340 [2023-11-12 01:04:30,760 INFO L226 Difference]: Without dead ends: 338 [2023-11-12 01:04:30,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:30,761 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:30,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-12 01:04:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 324. [2023-11-12 01:04:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.7430340557275543) internal successors, (1209), 323 states have internal predecessors, (1209), 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) [2023-11-12 01:04:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1209 transitions. [2023-11-12 01:04:30,774 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1209 transitions. Word has length 20 [2023-11-12 01:04:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:30,774 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 1209 transitions. [2023-11-12 01:04:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1209 transitions. [2023-11-12 01:04:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:30,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:30,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:30,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-12 01:04:30,777 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:30,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash -351885876, now seen corresponding path program 3 times [2023-11-12 01:04:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:30,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358804075] [2023-11-12 01:04:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:30,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:30,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358804075] [2023-11-12 01:04:30,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358804075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:30,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:30,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298534871] [2023-11-12 01:04:30,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:30,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:30,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:30,928 INFO L87 Difference]: Start difference. First operand 324 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:31,084 INFO L93 Difference]: Finished difference Result 344 states and 1286 transitions. [2023-11-12 01:04:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:31,088 INFO L225 Difference]: With dead ends: 344 [2023-11-12 01:04:31,088 INFO L226 Difference]: Without dead ends: 344 [2023-11-12 01:04:31,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:31,089 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:31,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-12 01:04:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 326. [2023-11-12 01:04:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.747692307692308) internal successors, (1218), 325 states have internal predecessors, (1218), 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) [2023-11-12 01:04:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1218 transitions. [2023-11-12 01:04:31,103 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1218 transitions. Word has length 20 [2023-11-12 01:04:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:31,103 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 1218 transitions. [2023-11-12 01:04:31,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1218 transitions. [2023-11-12 01:04:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:31,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:31,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:31,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-12 01:04:31,106 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:31,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1008230864, now seen corresponding path program 14 times [2023-11-12 01:04:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881411746] [2023-11-12 01:04:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:31,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881411746] [2023-11-12 01:04:31,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881411746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:31,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319058141] [2023-11-12 01:04:31,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:31,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:31,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:31,281 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:31,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 01:04:31,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:04:31,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:31,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:31,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:31,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:31,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319058141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:31,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860324541] [2023-11-12 01:04:31,790 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:31,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:31,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2023-11-12 01:04:31,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146619662] [2023-11-12 01:04:31,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:31,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:04:31,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:04:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:04:31,793 INFO L87 Difference]: Start difference. First operand 326 states and 1218 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-11-12 01:04:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:32,614 INFO L93 Difference]: Finished difference Result 468 states and 1718 transitions. [2023-11-12 01:04:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 01:04:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:32,619 INFO L225 Difference]: With dead ends: 468 [2023-11-12 01:04:32,619 INFO L226 Difference]: Without dead ends: 468 [2023-11-12 01:04:32,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:04:32,620 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:32,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:04:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-12 01:04:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 334. [2023-11-12 01:04:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.75975975975976) internal successors, (1252), 333 states have internal predecessors, (1252), 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) [2023-11-12 01:04:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1252 transitions. [2023-11-12 01:04:32,636 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1252 transitions. Word has length 20 [2023-11-12 01:04:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:32,637 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 1252 transitions. [2023-11-12 01:04:32,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-11-12 01:04:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1252 transitions. [2023-11-12 01:04:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:32,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:32,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:32,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:32,845 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:32,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 219568930, now seen corresponding path program 4 times [2023-11-12 01:04:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:32,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185028033] [2023-11-12 01:04:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:32,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:33,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185028033] [2023-11-12 01:04:33,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185028033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:33,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:33,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:33,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809975622] [2023-11-12 01:04:33,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:33,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:33,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:33,018 INFO L87 Difference]: Start difference. First operand 334 states and 1252 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:33,211 INFO L93 Difference]: Finished difference Result 354 states and 1315 transitions. [2023-11-12 01:04:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:33,215 INFO L225 Difference]: With dead ends: 354 [2023-11-12 01:04:33,215 INFO L226 Difference]: Without dead ends: 348 [2023-11-12 01:04:33,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:33,216 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:33,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-12 01:04:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 334. [2023-11-12 01:04:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.7537537537537538) internal successors, (1250), 333 states have internal predecessors, (1250), 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) [2023-11-12 01:04:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1250 transitions. [2023-11-12 01:04:33,230 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1250 transitions. Word has length 20 [2023-11-12 01:04:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:33,230 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 1250 transitions. [2023-11-12 01:04:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1250 transitions. [2023-11-12 01:04:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:33,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:33,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:33,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-12 01:04:33,234 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:33,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash -657164850, now seen corresponding path program 15 times [2023-11-12 01:04:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:33,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562926446] [2023-11-12 01:04:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:33,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:33,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562926446] [2023-11-12 01:04:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562926446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:33,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653107578] [2023-11-12 01:04:33,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:33,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:33,397 INFO L87 Difference]: Start difference. First operand 334 states and 1250 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:33,549 INFO L93 Difference]: Finished difference Result 350 states and 1309 transitions. [2023-11-12 01:04:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:33,553 INFO L225 Difference]: With dead ends: 350 [2023-11-12 01:04:33,553 INFO L226 Difference]: Without dead ends: 348 [2023-11-12 01:04:33,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:33,554 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:33,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:33,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-12 01:04:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 334. [2023-11-12 01:04:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.7477477477477477) internal successors, (1248), 333 states have internal predecessors, (1248), 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) [2023-11-12 01:04:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1248 transitions. [2023-11-12 01:04:33,567 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1248 transitions. Word has length 20 [2023-11-12 01:04:33,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:33,567 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 1248 transitions. [2023-11-12 01:04:33,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1248 transitions. [2023-11-12 01:04:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:33,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:33,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:33,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-12 01:04:33,570 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:33,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:33,571 INFO L85 PathProgramCache]: Analyzing trace with hash -860296688, now seen corresponding path program 16 times [2023-11-12 01:04:33,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:33,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277534824] [2023-11-12 01:04:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:33,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:33,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:33,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277534824] [2023-11-12 01:04:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277534824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:33,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47183063] [2023-11-12 01:04:33,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:04:33,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:33,724 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:33,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 01:04:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:33,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 01:04:33,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:33,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:34,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47183063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1725710795] [2023-11-12 01:04:34,435 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:34,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:34,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-11-12 01:04:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829437520] [2023-11-12 01:04:34,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:34,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:04:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:04:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:04:34,438 INFO L87 Difference]: Start difference. First operand 334 states and 1248 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:35,085 INFO L93 Difference]: Finished difference Result 612 states and 2058 transitions. [2023-11-12 01:04:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 01:04:35,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:35,090 INFO L225 Difference]: With dead ends: 612 [2023-11-12 01:04:35,091 INFO L226 Difference]: Without dead ends: 612 [2023-11-12 01:04:35,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:04:35,092 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:35,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:04:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-11-12 01:04:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 340. [2023-11-12 01:04:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.746312684365782) internal successors, (1270), 339 states have internal predecessors, (1270), 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) [2023-11-12 01:04:35,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1270 transitions. [2023-11-12 01:04:35,109 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1270 transitions. Word has length 20 [2023-11-12 01:04:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:35,110 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 1270 transitions. [2023-11-12 01:04:35,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1270 transitions. [2023-11-12 01:04:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:35,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:35,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:35,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:35,319 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -989887834, now seen corresponding path program 5 times [2023-11-12 01:04:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241208238] [2023-11-12 01:04:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:35,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:35,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241208238] [2023-11-12 01:04:35,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241208238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:35,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:35,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:35,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56319862] [2023-11-12 01:04:35,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:35,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:35,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:35,499 INFO L87 Difference]: Start difference. First operand 340 states and 1270 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:35,664 INFO L93 Difference]: Finished difference Result 376 states and 1354 transitions. [2023-11-12 01:04:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:35,668 INFO L225 Difference]: With dead ends: 376 [2023-11-12 01:04:35,668 INFO L226 Difference]: Without dead ends: 356 [2023-11-12 01:04:35,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:35,669 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:35,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-12 01:04:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 336. [2023-11-12 01:04:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.7134328358208957) internal successors, (1244), 335 states have internal predecessors, (1244), 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) [2023-11-12 01:04:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1244 transitions. [2023-11-12 01:04:35,682 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1244 transitions. Word has length 20 [2023-11-12 01:04:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:35,682 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 1244 transitions. [2023-11-12 01:04:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1244 transitions. [2023-11-12 01:04:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:35,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:35,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-12 01:04:35,685 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:35,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:35,685 INFO L85 PathProgramCache]: Analyzing trace with hash -103812654, now seen corresponding path program 17 times [2023-11-12 01:04:35,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:35,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239563547] [2023-11-12 01:04:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:35,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239563547] [2023-11-12 01:04:35,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239563547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375108769] [2023-11-12 01:04:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:35,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:35,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:35,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 01:04:36,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:04:36,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:36,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:04:36,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:36,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:36,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375108769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577604962] [2023-11-12 01:04:36,341 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:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) 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) [2023-11-12 01:04:36,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2023-11-12 01:04:36,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341330673] [2023-11-12 01:04:36,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:04:36,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 01:04:36,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 01:04:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:04:36,343 INFO L87 Difference]: Start difference. First operand 336 states and 1244 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-11-12 01:04:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:37,120 INFO L93 Difference]: Finished difference Result 510 states and 1760 transitions. [2023-11-12 01:04:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 01:04:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:37,130 INFO L225 Difference]: With dead ends: 510 [2023-11-12 01:04:37,131 INFO L226 Difference]: Without dead ends: 510 [2023-11-12 01:04:37,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-12 01:04:37,133 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:37,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 01:04:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-11-12 01:04:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 342. [2023-11-12 01:04:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.7067448680351904) internal successors, (1264), 341 states have internal predecessors, (1264), 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) [2023-11-12 01:04:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1264 transitions. [2023-11-12 01:04:37,148 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1264 transitions. Word has length 20 [2023-11-12 01:04:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:37,149 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 1264 transitions. [2023-11-12 01:04:37,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-11-12 01:04:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1264 transitions. [2023-11-12 01:04:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:37,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:37,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:37,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036ffae9-9d87-478d-99e6-a7a1106ef01b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-12 01:04:37,358 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:37,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1769208368, now seen corresponding path program 18 times [2023-11-12 01:04:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:37,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435498125] [2023-11-12 01:04:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:37,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:37,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435498125] [2023-11-12 01:04:37,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435498125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:37,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:37,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764993319] [2023-11-12 01:04:37,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:37,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:37,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:37,508 INFO L87 Difference]: Start difference. First operand 342 states and 1264 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:37,623 INFO L93 Difference]: Finished difference Result 360 states and 1326 transitions. [2023-11-12 01:04:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:37,627 INFO L225 Difference]: With dead ends: 360 [2023-11-12 01:04:37,627 INFO L226 Difference]: Without dead ends: 358 [2023-11-12 01:04:37,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:04:37,628 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:37,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-12 01:04:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 340. [2023-11-12 01:04:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.7079646017699117) internal successors, (1257), 339 states have internal predecessors, (1257), 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) [2023-11-12 01:04:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1257 transitions. [2023-11-12 01:04:37,642 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1257 transitions. Word has length 20 [2023-11-12 01:04:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:37,642 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 1257 transitions. [2023-11-12 01:04:37,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1257 transitions. [2023-11-12 01:04:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:37,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:37,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:37,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-12 01:04:37,645 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:37,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1790009267, now seen corresponding path program 13 times [2023-11-12 01:04:37,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696855859] [2023-11-12 01:04:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:37,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:37,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:37,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696855859] [2023-11-12 01:04:37,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696855859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:37,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:37,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464701797] [2023-11-12 01:04:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:37,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:37,797 INFO L87 Difference]: Start difference. First operand 340 states and 1257 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:38,152 INFO L93 Difference]: Finished difference Result 634 states and 2102 transitions. [2023-11-12 01:04:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:04:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:38,166 INFO L225 Difference]: With dead ends: 634 [2023-11-12 01:04:38,167 INFO L226 Difference]: Without dead ends: 634 [2023-11-12 01:04:38,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:04:38,174 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:38,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2023-11-12 01:04:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 376. [2023-11-12 01:04:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.6773333333333333) internal successors, (1379), 375 states have internal predecessors, (1379), 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) [2023-11-12 01:04:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1379 transitions. [2023-11-12 01:04:38,193 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1379 transitions. Word has length 20 [2023-11-12 01:04:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:38,193 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 1379 transitions. [2023-11-12 01:04:38,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1379 transitions. [2023-11-12 01:04:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:38,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:38,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:38,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-12 01:04:38,196 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:38,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1945238949, now seen corresponding path program 14 times [2023-11-12 01:04:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:38,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51359874] [2023-11-12 01:04:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:38,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:38,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:38,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51359874] [2023-11-12 01:04:38,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51359874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:38,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:38,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698581663] [2023-11-12 01:04:38,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:38,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:38,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:38,351 INFO L87 Difference]: Start difference. First operand 376 states and 1379 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:38,577 INFO L93 Difference]: Finished difference Result 466 states and 1619 transitions. [2023-11-12 01:04:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:38,579 INFO L225 Difference]: With dead ends: 466 [2023-11-12 01:04:38,580 INFO L226 Difference]: Without dead ends: 466 [2023-11-12 01:04:38,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:04:38,580 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:38,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-12 01:04:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 380. [2023-11-12 01:04:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.688654353562005) internal successors, (1398), 379 states have internal predecessors, (1398), 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) [2023-11-12 01:04:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1398 transitions. [2023-11-12 01:04:38,595 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1398 transitions. Word has length 20 [2023-11-12 01:04:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:38,595 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 1398 transitions. [2023-11-12 01:04:38,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1398 transitions. [2023-11-12 01:04:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:38,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:38,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-11-12 01:04:38,598 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:38,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1087553711, now seen corresponding path program 15 times [2023-11-12 01:04:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879740766] [2023-11-12 01:04:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:38,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:38,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879740766] [2023-11-12 01:04:38,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879740766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:38,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:38,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209377106] [2023-11-12 01:04:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:38,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:38,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:38,764 INFO L87 Difference]: Start difference. First operand 380 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:38,964 INFO L93 Difference]: Finished difference Result 460 states and 1596 transitions. [2023-11-12 01:04:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:38,966 INFO L225 Difference]: With dead ends: 460 [2023-11-12 01:04:38,967 INFO L226 Difference]: Without dead ends: 456 [2023-11-12 01:04:38,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:04:38,967 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:38,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:38,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-11-12 01:04:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 380. [2023-11-12 01:04:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.678100263852243) internal successors, (1394), 379 states have internal predecessors, (1394), 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) [2023-11-12 01:04:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1394 transitions. [2023-11-12 01:04:38,983 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1394 transitions. Word has length 20 [2023-11-12 01:04:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:38,983 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 1394 transitions. [2023-11-12 01:04:38,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:38,984 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1394 transitions. [2023-11-12 01:04:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:38,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:38,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:38,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-12 01:04:38,986 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:38,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:38,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1708574014, now seen corresponding path program 6 times [2023-11-12 01:04:38,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:38,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961762753] [2023-11-12 01:04:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:38,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:39,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:39,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961762753] [2023-11-12 01:04:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961762753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:39,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:39,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:39,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280990440] [2023-11-12 01:04:39,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:39,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:39,180 INFO L87 Difference]: Start difference. First operand 380 states and 1394 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:39,372 INFO L93 Difference]: Finished difference Result 462 states and 1594 transitions. [2023-11-12 01:04:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:04:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 01:04:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:39,375 INFO L225 Difference]: With dead ends: 462 [2023-11-12 01:04:39,375 INFO L226 Difference]: Without dead ends: 456 [2023-11-12 01:04:39,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:04:39,376 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:39,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-11-12 01:04:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 376. [2023-11-12 01:04:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.6773333333333333) internal successors, (1379), 375 states have internal predecessors, (1379), 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) [2023-11-12 01:04:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1379 transitions. [2023-11-12 01:04:39,390 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1379 transitions. Word has length 20 [2023-11-12 01:04:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:39,390 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 1379 transitions. [2023-11-12 01:04:39,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1379 transitions. [2023-11-12 01:04:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 01:04:39,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:39,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-12 01:04:39,392 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 01:04:39,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash -49339780, now seen corresponding path program 7 times [2023-11-12 01:04:39,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:39,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469858180] [2023-11-12 01:04:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:39,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:39,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469858180] [2023-11-12 01:04:39,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469858180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:39,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:04:39,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735829252] [2023-11-12 01:04:39,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:39,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:04:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:04:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:39,583 INFO L87 Difference]: Start difference. First operand 376 states and 1379 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)