./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --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_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/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_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/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_af71af60-f6f4-4c71-9115-0a8fa9193353/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 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:56:08,967 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:56:09,043 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:56:09,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:56:09,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:56:09,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:56:09,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:56:09,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:56:09,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:56:09,082 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:56:09,083 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:56:09,084 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:56:09,084 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:56:09,085 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:56:09,085 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:56:09,086 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:56:09,087 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:56:09,087 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:56:09,088 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:56:09,088 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:56:09,089 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:56:09,089 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:56:09,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:56:09,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:56:09,091 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:56:09,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:56:09,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:56:09,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:56:09,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:56:09,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:56:09,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:56:09,094 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:56:09,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:56:09,095 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:56:09,096 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:56:09,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:56:09,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:09,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:56:09,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:56:09,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:56:09,099 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:56:09,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:56:09,100 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:56:09,100 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:56:09,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:56:09,101 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_af71af60-f6f4-4c71-9115-0a8fa9193353/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2023-11-12 00:56:09,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:56:09,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:56:09,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:56:09,383 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:56:09,384 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:56:09,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2023-11-12 00:56:12,569 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:56:12,868 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:56:12,870 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2023-11-12 00:56:12,895 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/data/9458ea037/1cdfa7fbfce147a89e768335e8a3651d/FLAG00c57a489 [2023-11-12 00:56:12,913 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/data/9458ea037/1cdfa7fbfce147a89e768335e8a3651d [2023-11-12 00:56:12,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:56:12,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:56:12,925 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:12,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:56:12,931 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:56:12,932 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:12" (1/1) ... [2023-11-12 00:56:12,933 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687aa0d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:12, skipping insertion in model container [2023-11-12 00:56:12,933 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:12" (1/1) ... [2023-11-12 00:56:13,005 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:56:13,416 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_af71af60-f6f4-4c71-9115-0a8fa9193353/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-11-12 00:56:13,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:13,437 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:56:13,477 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_af71af60-f6f4-4c71-9115-0a8fa9193353/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-11-12 00:56:13,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:13,532 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:56:13,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13 WrapperNode [2023-11-12 00:56:13,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:13,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:13,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:56:13,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:56:13,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,623 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 125 [2023-11-12 00:56:13,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:13,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:56:13,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:56:13,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:56:13,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,685 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:56:13,694 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:56:13,694 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:56:13,695 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:56:13,696 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (1/1) ... [2023-11-12 00:56:13,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:13,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:56:13,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af71af60-f6f4-4c71-9115-0a8fa9193353/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:56:13,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:56:13,779 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-12 00:56:13,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-12 00:56:13,780 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 00:56:13,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 00:56:13,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:56:13,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:56:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:56:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:56:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:56:13,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:56:13,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:56:13,785 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 00:56:13,965 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:56:13,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:56:14,271 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:56:14,547 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:56:14,547 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:56:14,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:14 BoogieIcfgContainer [2023-11-12 00:56:14,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:56:14,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:56:14,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:56:14,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:56:14,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:56:12" (1/3) ... [2023-11-12 00:56:14,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b049f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:14, skipping insertion in model container [2023-11-12 00:56:14,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:13" (2/3) ... [2023-11-12 00:56:14,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b049f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:14, skipping insertion in model container [2023-11-12 00:56:14,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:14" (3/3) ... [2023-11-12 00:56:14,560 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-11-12 00:56:14,570 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 00:56:14,582 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:56:14,583 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:56:14,583 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:56:14,636 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:14,673 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:14,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 160 flow [2023-11-12 00:56:14,692 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 160 flow [2023-11-12 00:56:14,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 160 flow [2023-11-12 00:56:14,743 INFO L124 PetriNetUnfolderBase]: 6/86 cut-off events. [2023-11-12 00:56:14,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:56:14,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 86 events. 6/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 128 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 70. Up to 4 conditions per place. [2023-11-12 00:56:14,753 INFO L119 LiptonReduction]: Number of co-enabled transitions 1900 [2023-11-12 00:56:17,203 INFO L134 LiptonReduction]: Checked pairs total: 3338 [2023-11-12 00:56:17,203 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-11-12 00:56:17,215 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 58 flow [2023-11-12 00:56:17,270 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 286 states, 282 states have (on average 2.9290780141843973) internal successors, (826), 285 states have internal predecessors, (826), 0 states have call successors, (0), 0 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 00:56:17,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:17,297 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;@3f9559db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:17,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 00:56:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 286 states, 282 states have (on average 2.9290780141843973) internal successors, (826), 285 states have internal predecessors, (826), 0 states have call successors, (0), 0 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 00:56:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:56:17,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:17,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:56:17,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 00:56:17,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash 495330996, now seen corresponding path program 1 times [2023-11-12 00:56:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:17,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600519051] [2023-11-12 00:56:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:17,636 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 00:56:17,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600519051] [2023-11-12 00:56:17,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600519051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:17,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:17,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:17,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630965877] [2023-11-12 00:56:17,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:17,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:17,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:17,671 INFO L87 Difference]: Start difference. First operand has 286 states, 282 states have (on average 2.9290780141843973) internal successors, (826), 285 states have internal predecessors, (826), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 00:56:17,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:17,748 INFO L93 Difference]: Finished difference Result 202 states and 523 transitions. [2023-11-12 00:56:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:17,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-12 00:56:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:17,769 INFO L225 Difference]: With dead ends: 202 [2023-11-12 00:56:17,770 INFO L226 Difference]: Without dead ends: 202 [2023-11-12 00:56:17,771 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 00:56:17,777 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:17,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:56:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-12 00:56:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-12 00:56:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.601990049751244) internal successors, (523), 201 states have internal predecessors, (523), 0 states have call successors, (0), 0 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 00:56:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 523 transitions. [2023-11-12 00:56:17,839 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 523 transitions. Word has length 5 [2023-11-12 00:56:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:17,840 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 523 transitions. [2023-11-12 00:56:17,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 00:56:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 523 transitions. [2023-11-12 00:56:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:56:17,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:17,844 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:17,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:56:17,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 00:56:17,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:17,846 INFO L85 PathProgramCache]: Analyzing trace with hash -406437917, now seen corresponding path program 1 times [2023-11-12 00:56:17,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:17,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024777913] [2023-11-12 00:56:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:17,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:56:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:17,934 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:56:17,934 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:56:17,935 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 00:56:17,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 00:56:17,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-12 00:56:17,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 00:56:17,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:56:17,940 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 00:56:17,942 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:56:17,942 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 00:56:17,994 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:18,003 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:18,003 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 118 transitions, 256 flow [2023-11-12 00:56:18,004 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 118 transitions, 256 flow [2023-11-12 00:56:18,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 118 transitions, 256 flow [2023-11-12 00:56:18,046 INFO L124 PetriNetUnfolderBase]: 8/127 cut-off events. [2023-11-12 00:56:18,046 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:56:18,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 127 events. 8/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 247 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-11-12 00:56:18,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 4896 [2023-11-12 00:56:20,638 INFO L134 LiptonReduction]: Checked pairs total: 13339 [2023-11-12 00:56:20,639 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-12 00:56:20,640 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 50 transitions, 120 flow [2023-11-12 00:56:20,936 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6323 states, 6318 states have (on average 3.9444444444444446) internal successors, (24921), 6322 states have internal predecessors, (24921), 0 states have call successors, (0), 0 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 00:56:20,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:20,939 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;@3f9559db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:20,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 00:56:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 6323 states, 6318 states have (on average 3.9444444444444446) internal successors, (24921), 6322 states have internal predecessors, (24921), 0 states have call successors, (0), 0 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 00:56:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:56:20,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:20,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:56:20,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 00:56:20,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:20,970 INFO L85 PathProgramCache]: Analyzing trace with hash 729246121, now seen corresponding path program 1 times [2023-11-12 00:56:20,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:20,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812696928] [2023-11-12 00:56:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:21,026 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 00:56:21,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812696928] [2023-11-12 00:56:21,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812696928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:21,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:21,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:21,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937792829] [2023-11-12 00:56:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:21,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:21,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:21,052 INFO L87 Difference]: Start difference. First operand has 6323 states, 6318 states have (on average 3.9444444444444446) internal successors, (24921), 6322 states have internal predecessors, (24921), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 00:56:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:21,233 INFO L93 Difference]: Finished difference Result 4602 states and 17072 transitions. [2023-11-12 00:56:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-12 00:56:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:21,303 INFO L225 Difference]: With dead ends: 4602 [2023-11-12 00:56:21,303 INFO L226 Difference]: Without dead ends: 4602 [2023-11-12 00:56:21,305 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 00:56:21,308 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:21,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 17 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2023-11-12 00:56:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 4602. [2023-11-12 00:56:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 3.710497717887416) internal successors, (17072), 4601 states have internal predecessors, (17072), 0 states have call successors, (0), 0 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 00:56:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 17072 transitions. [2023-11-12 00:56:21,798 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 17072 transitions. Word has length 5 [2023-11-12 00:56:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:21,799 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 17072 transitions. [2023-11-12 00:56:21,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 00:56:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 17072 transitions. [2023-11-12 00:56:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:56:21,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:21,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:21,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:56:21,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 00:56:21,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash -312698891, now seen corresponding path program 1 times [2023-11-12 00:56:21,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:21,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119463894] [2023-11-12 00:56:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:21,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:21,983 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 00:56:21,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:21,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119463894] [2023-11-12 00:56:21,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119463894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:21,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:21,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:21,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473555271] [2023-11-12 00:56:21,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:21,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:21,988 INFO L87 Difference]: Start difference. First operand 4602 states and 17072 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 00:56:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:22,414 INFO L93 Difference]: Finished difference Result 5564 states and 20524 transitions. [2023-11-12 00:56:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:56:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:56:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:22,479 INFO L225 Difference]: With dead ends: 5564 [2023-11-12 00:56:22,480 INFO L226 Difference]: Without dead ends: 5564 [2023-11-12 00:56:22,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:22,481 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:22,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 60 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2023-11-12 00:56:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 5164. [2023-11-12 00:56:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5164 states, 5163 states have (on average 3.717606042998257) internal successors, (19194), 5163 states have internal predecessors, (19194), 0 states have call successors, (0), 0 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 00:56:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5164 states to 5164 states and 19194 transitions. [2023-11-12 00:56:22,843 INFO L78 Accepts]: Start accepts. Automaton has 5164 states and 19194 transitions. Word has length 12 [2023-11-12 00:56:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:22,844 INFO L495 AbstractCegarLoop]: Abstraction has 5164 states and 19194 transitions. [2023-11-12 00:56:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 00:56:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5164 states and 19194 transitions. [2023-11-12 00:56:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:56:22,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:22,848 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:22,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:56:22,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 00:56:22,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash -277562972, now seen corresponding path program 1 times [2023-11-12 00:56:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:22,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567112491] [2023-11-12 00:56:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:22,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:22,867 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:56:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:22,885 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:56:22,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:56:22,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 00:56:22,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 00:56:22,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-12 00:56:22,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 00:56:22,890 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 00:56:22,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:56:22,891 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 00:56:22,892 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:56:22,892 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 00:56:22,950 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:22,955 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:22,956 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 160 transitions, 356 flow [2023-11-12 00:56:22,957 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 160 transitions, 356 flow [2023-11-12 00:56:22,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 160 transitions, 356 flow [2023-11-12 00:56:22,995 INFO L124 PetriNetUnfolderBase]: 10/168 cut-off events. [2023-11-12 00:56:22,995 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 00:56:22,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 168 events. 10/168 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-11-12 00:56:23,007 INFO L119 LiptonReduction]: Number of co-enabled transitions 9404 [2023-11-12 00:56:26,516 INFO L134 LiptonReduction]: Checked pairs total: 26838 [2023-11-12 00:56:26,517 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-11-12 00:56:26,518 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 76 places, 68 transitions, 172 flow [2023-11-12 00:56:30,395 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 82204 states, 82198 states have (on average 4.770043066741283) internal successors, (392088), 82203 states have internal predecessors, (392088), 0 states have call successors, (0), 0 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 00:56:30,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:30,397 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;@3f9559db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:30,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 00:56:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 82204 states, 82198 states have (on average 4.770043066741283) internal successors, (392088), 82203 states have internal predecessors, (392088), 0 states have call successors, (0), 0 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 00:56:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:56:30,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:30,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:56:30,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 00:56:30,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1030836586, now seen corresponding path program 1 times [2023-11-12 00:56:30,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158325646] [2023-11-12 00:56:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:30,649 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 00:56:30,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158325646] [2023-11-12 00:56:30,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158325646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:30,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:30,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488167117] [2023-11-12 00:56:30,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:30,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:30,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:30,823 INFO L87 Difference]: Start difference. First operand has 82204 states, 82198 states have (on average 4.770043066741283) internal successors, (392088), 82203 states have internal predecessors, (392088), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 00:56:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:32,510 INFO L93 Difference]: Finished difference Result 59268 states and 280379 transitions. [2023-11-12 00:56:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-12 00:56:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:33,345 INFO L225 Difference]: With dead ends: 59268 [2023-11-12 00:56:33,345 INFO L226 Difference]: Without dead ends: 59268 [2023-11-12 00:56:33,345 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 00:56:33,346 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:33,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59268 states. [2023-11-12 00:56:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59268 to 59268. [2023-11-12 00:56:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59268 states, 59267 states have (on average 4.730777667167226) internal successors, (280379), 59267 states have internal predecessors, (280379), 0 states have call successors, (0), 0 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 00:56:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59268 states to 59268 states and 280379 transitions. [2023-11-12 00:56:37,846 INFO L78 Accepts]: Start accepts. Automaton has 59268 states and 280379 transitions. Word has length 5 [2023-11-12 00:56:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:37,846 INFO L495 AbstractCegarLoop]: Abstraction has 59268 states and 280379 transitions. [2023-11-12 00:56:37,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 00:56:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 59268 states and 280379 transitions. [2023-11-12 00:56:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:56:37,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:37,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:37,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:56:37,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 00:56:37,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash -708488027, now seen corresponding path program 1 times [2023-11-12 00:56:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381184046] [2023-11-12 00:56:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:37,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:37,936 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 00:56:37,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:37,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381184046] [2023-11-12 00:56:37,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381184046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:37,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:37,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444674335] [2023-11-12 00:56:37,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:37,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:37,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:37,940 INFO L87 Difference]: Start difference. First operand 59268 states and 280379 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 00:56:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:39,502 INFO L93 Difference]: Finished difference Result 75946 states and 357399 transitions. [2023-11-12 00:56:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:56:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:56:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:41,012 INFO L225 Difference]: With dead ends: 75946 [2023-11-12 00:56:41,013 INFO L226 Difference]: Without dead ends: 75946 [2023-11-12 00:56:41,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:41,014 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:41,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 81 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:56:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75946 states. [2023-11-12 00:56:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75946 to 69226. [2023-11-12 00:56:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69226 states, 69225 states have (on average 4.740931744312026) internal successors, (328191), 69225 states have internal predecessors, (328191), 0 states have call successors, (0), 0 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 00:56:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69226 states to 69226 states and 328191 transitions. [2023-11-12 00:56:45,120 INFO L78 Accepts]: Start accepts. Automaton has 69226 states and 328191 transitions. Word has length 12 [2023-11-12 00:56:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:45,120 INFO L495 AbstractCegarLoop]: Abstraction has 69226 states and 328191 transitions. [2023-11-12 00:56:45,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 00:56:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 69226 states and 328191 transitions. [2023-11-12 00:56:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:56:45,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:45,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:45,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:56:45,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 00:56:45,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2042838484, now seen corresponding path program 1 times [2023-11-12 00:56:45,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:45,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867370798] [2023-11-12 00:56:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:45,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:45,269 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 00:56:45,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:45,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867370798] [2023-11-12 00:56:45,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867370798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:45,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:45,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:45,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526075943] [2023-11-12 00:56:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:45,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:56:45,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:56:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:45,272 INFO L87 Difference]: Start difference. First operand 69226 states and 328191 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 00:56:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:47,417 INFO L93 Difference]: Finished difference Result 100902 states and 471779 transitions. [2023-11-12 00:56:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:56:47,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-11-12 00:56:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:48,982 INFO L225 Difference]: With dead ends: 100902 [2023-11-12 00:56:48,983 INFO L226 Difference]: Without dead ends: 100902 [2023-11-12 00:56:48,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:56:48,985 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 294 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:48,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 160 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100902 states. [2023-11-12 00:56:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100902 to 85782. [2023-11-12 00:56:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85782 states, 85781 states have (on average 4.745934414380807) internal successors, (407111), 85781 states have internal predecessors, (407111), 0 states have call successors, (0), 0 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 00:56:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85782 states to 85782 states and 407111 transitions. [2023-11-12 00:56:53,375 INFO L78 Accepts]: Start accepts. Automaton has 85782 states and 407111 transitions. Word has length 14 [2023-11-12 00:56:53,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:53,375 INFO L495 AbstractCegarLoop]: Abstraction has 85782 states and 407111 transitions. [2023-11-12 00:56:53,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 00:56:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 85782 states and 407111 transitions. [2023-11-12 00:56:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:56:53,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:53,377 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:53,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:56:53,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 00:56:53,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:53,378 INFO L85 PathProgramCache]: Analyzing trace with hash -881060418, now seen corresponding path program 1 times [2023-11-12 00:56:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:53,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583890999] [2023-11-12 00:56:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:53,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:56:53,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:53,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583890999] [2023-11-12 00:56:53,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583890999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:53,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:53,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911829800] [2023-11-12 00:56:53,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:53,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:53,483 INFO L87 Difference]: Start difference. First operand 85782 states and 407111 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 00:56:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:55,528 INFO L93 Difference]: Finished difference Result 100478 states and 474965 transitions. [2023-11-12 00:56:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:56:55,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 00:56:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted.