./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:22:57,732 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:22:57,800 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:22:57,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:22:57,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:22:57,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:22:57,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:22:57,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:22:57,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:22:57,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:22:57,835 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:22:57,835 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:22:57,836 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:22:57,837 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:22:57,837 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:22:57,838 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:22:57,838 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:22:57,839 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:22:57,839 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:22:57,840 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:22:57,840 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:22:57,841 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:22:57,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:22:57,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:22:57,843 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:22:57,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:22:57,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:22:57,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:22:57,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:22:57,846 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:22:57,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:22:57,847 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:22:57,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:22:57,847 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:22:57,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:22:57,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:22:57,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:22:57,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:57,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:22:57,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:22:57,853 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:22:57,855 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:22:57,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:22:57,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:22:57,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:22:57,856 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:22:57,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:22:57,856 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_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2023-11-23 21:22:58,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:22:58,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:22:58,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:22:58,159 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:22:58,159 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:22:58,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-23 21:23:01,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:23:01,525 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:23:01,525 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-23 21:23:01,544 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/data/d55f80e07/14b16bf133ca4b1da0110f32740c9b50/FLAG9df6e6860 [2023-11-23 21:23:01,559 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/data/d55f80e07/14b16bf133ca4b1da0110f32740c9b50 [2023-11-23 21:23:01,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:23:01,563 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:23:01,565 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:01,565 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:23:01,570 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:23:01,571 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:01" (1/1) ... [2023-11-23 21:23:01,572 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568c1a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:01, skipping insertion in model container [2023-11-23 21:23:01,572 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:01" (1/1) ... [2023-11-23 21:23:01,617 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:23:01,978 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_04be6678-854c-4e44-ad80-1e719d40455f/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2023-11-23 21:23:01,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:02,000 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:23:02,067 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_04be6678-854c-4e44-ad80-1e719d40455f/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2023-11-23 21:23:02,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:02,124 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:02,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02 WrapperNode [2023-11-23 21:23:02,125 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:02,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:02,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:02,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:02,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,170 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 46 [2023-11-23 21:23:02,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:02,171 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:02,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:02,172 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:02,187 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,203 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:02,234 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:02,234 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:02,234 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:02,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (1/1) ... [2023-11-23 21:23:02,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:02,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:02,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:02,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04be6678-854c-4e44-ad80-1e719d40455f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-23 21:23:02,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-23 21:23:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:23:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:23:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:23:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:23:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:23:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:02,304 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:23:02,480 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:02,482 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:23:02,620 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:23:02,715 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:23:02,715 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:23:02,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:02 BoogieIcfgContainer [2023-11-23 21:23:02,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:23:02,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:23:02,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:23:02,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:23:02,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:01" (1/3) ... [2023-11-23 21:23:02,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b0195d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:02, skipping insertion in model container [2023-11-23 21:23:02,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:02" (2/3) ... [2023-11-23 21:23:02,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b0195d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:02, skipping insertion in model container [2023-11-23 21:23:02,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:02" (3/3) ... [2023-11-23 21:23:02,730 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-11-23 21:23:02,740 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 21:23:02,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:23:02,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:23:02,751 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:23:02,781 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:23:02,809 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 15 transitions, 34 flow [2023-11-23 21:23:02,826 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:02,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:02,852 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;@7f4d1a6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:02,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 21:23:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:23:02,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:02,862 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-23 21:23:02,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:02,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 469336669, now seen corresponding path program 1 times [2023-11-23 21:23:02,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:02,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438902934] [2023-11-23 21:23:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:02,988 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:23:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:03,027 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:23:03,032 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:23:03,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-23 21:23:03,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-23 21:23:03,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-23 21:23:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:23:03,039 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 21:23:03,042 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 21:23:03,042 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-23 21:23:03,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:23:03,063 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 60 flow [2023-11-23 21:23:03,132 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 432 states, 424 states have (on average 2.7570754716981134) internal successors, (1169), 431 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) [2023-11-23 21:23:03,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:03,136 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;@7f4d1a6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:03,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 21:23:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 424 states have (on average 2.7570754716981134) internal successors, (1169), 431 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) [2023-11-23 21:23:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:23:03,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:03,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:03,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-23 21:23:03,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:03,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1887281157, now seen corresponding path program 1 times [2023-11-23 21:23:03,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:03,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322052307] [2023-11-23 21:23:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:03,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:03,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322052307] [2023-11-23 21:23:03,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322052307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:03,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:03,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:03,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914275801] [2023-11-23 21:23:03,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:03,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:03,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:03,350 INFO L87 Difference]: Start difference. First operand has 432 states, 424 states have (on average 2.7570754716981134) internal successors, (1169), 431 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:03,409 INFO L93 Difference]: Finished difference Result 220 states and 525 transitions. [2023-11-23 21:23:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:23:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:03,425 INFO L225 Difference]: With dead ends: 220 [2023-11-23 21:23:03,425 INFO L226 Difference]: Without dead ends: 220 [2023-11-23 21:23:03,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:03,430 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:03,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 3 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-23 21:23:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2023-11-23 21:23:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3972602739726026) internal successors, (525), 219 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 525 transitions. [2023-11-23 21:23:03,492 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 525 transitions. Word has length 8 [2023-11-23 21:23:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 525 transitions. [2023-11-23 21:23:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 525 transitions. [2023-11-23 21:23:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:23:03,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:03,494 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-23 21:23:03,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:23:03,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-23 21:23:03,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:03,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1124449936, now seen corresponding path program 1 times [2023-11-23 21:23:03,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:03,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159050428] [2023-11-23 21:23:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:03,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:03,524 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:23:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:03,552 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:23:03,553 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:23:03,553 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-23 21:23:03,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-23 21:23:03,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-23 21:23:03,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-23 21:23:03,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:23:03,555 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 21:23:03,555 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 21:23:03,555 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-23 21:23:03,594 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:23:03,597 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 88 flow [2023-11-23 21:23:03,852 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3969 states, 3950 states have (on average 3.727341772151899) internal successors, (14723), 3968 states have internal predecessors, (14723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:03,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:03,863 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;@7f4d1a6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:03,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-23 21:23:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 3969 states, 3950 states have (on average 3.727341772151899) internal successors, (14723), 3968 states have internal predecessors, (14723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:23:03,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:03,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:03,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:03,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1272479506, now seen corresponding path program 1 times [2023-11-23 21:23:03,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:03,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473565526] [2023-11-23 21:23:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:03,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:04,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:04,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473565526] [2023-11-23 21:23:04,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473565526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:04,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:04,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:04,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325608989] [2023-11-23 21:23:04,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:04,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:04,056 INFO L87 Difference]: Start difference. First operand has 3969 states, 3950 states have (on average 3.727341772151899) internal successors, (14723), 3968 states have internal predecessors, (14723), 0 states have call successors, (0), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:04,145 INFO L93 Difference]: Finished difference Result 1543 states and 4998 transitions. [2023-11-23 21:23:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:23:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:04,177 INFO L225 Difference]: With dead ends: 1543 [2023-11-23 21:23:04,177 INFO L226 Difference]: Without dead ends: 1543 [2023-11-23 21:23:04,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:04,179 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:04,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:23:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2023-11-23 21:23:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2023-11-23 21:23:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.2412451361867705) internal successors, (4998), 1542 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 4998 transitions. [2023-11-23 21:23:04,281 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 4998 transitions. Word has length 8 [2023-11-23 21:23:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:04,281 INFO L495 AbstractCegarLoop]: Abstraction has 1543 states and 4998 transitions. [2023-11-23 21:23:04,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 4998 transitions. [2023-11-23 21:23:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:23:04,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:04,285 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-23 21:23:04,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:23:04,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 21:23:04,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1390542948, now seen corresponding path program 1 times [2023-11-23 21:23:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685235978] [2023-11-23 21:23:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:04,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:04,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:23:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:04,367 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:23:04,367 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:23:04,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-23 21:23:04,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-23 21:23:04,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-23 21:23:04,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-23 21:23:04,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-23 21:23:04,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:23:04,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 21:23:04,370 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 21:23:04,370 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-23 21:23:04,391 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:23:04,393 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 45 transitions, 118 flow [2023-11-23 21:23:06,309 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35964 states, 35922 states have (on average 4.718194978007906) internal successors, (169487), 35963 states have internal predecessors, (169487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:06,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:06,318 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;@7f4d1a6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:06,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-23 21:23:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 35964 states, 35922 states have (on average 4.718194978007906) internal successors, (169487), 35963 states have internal predecessors, (169487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:23:06,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:06,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:06,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 21:23:06,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:06,399 INFO L85 PathProgramCache]: Analyzing trace with hash 975032562, now seen corresponding path program 1 times [2023-11-23 21:23:06,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:06,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317794651] [2023-11-23 21:23:06,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:06,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:06,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317794651] [2023-11-23 21:23:06,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317794651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:06,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:06,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:06,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245932649] [2023-11-23 21:23:06,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:06,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:06,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:06,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:06,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:06,671 INFO L87 Difference]: Start difference. First operand has 35964 states, 35922 states have (on average 4.718194978007906) internal successors, (169487), 35963 states have internal predecessors, (169487), 0 states have call successors, (0), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:06,953 INFO L93 Difference]: Finished difference Result 10804 states and 44247 transitions. [2023-11-23 21:23:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:23:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:07,233 INFO L225 Difference]: With dead ends: 10804 [2023-11-23 21:23:07,233 INFO L226 Difference]: Without dead ends: 10804 [2023-11-23 21:23:07,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:07,234 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:07,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 5 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2023-11-23 21:23:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 10804. [2023-11-23 21:23:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10804 states, 10803 states have (on average 4.095806720355457) internal successors, (44247), 10803 states have internal predecessors, (44247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10804 states to 10804 states and 44247 transitions. [2023-11-23 21:23:08,067 INFO L78 Accepts]: Start accepts. Automaton has 10804 states and 44247 transitions. Word has length 8 [2023-11-23 21:23:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:08,067 INFO L495 AbstractCegarLoop]: Abstraction has 10804 states and 44247 transitions. [2023-11-23 21:23:08,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 10804 states and 44247 transitions. [2023-11-23 21:23:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:23:08,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:08,072 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:08,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:23:08,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 21:23:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2107663441, now seen corresponding path program 1 times [2023-11-23 21:23:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:08,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108414530] [2023-11-23 21:23:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:08,108 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:23:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:08,147 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:23:08,149 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:23:08,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-23 21:23:08,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-23 21:23:08,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-23 21:23:08,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-23 21:23:08,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-23 21:23:08,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-23 21:23:08,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:23:08,153 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 21:23:08,157 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 21:23:08,158 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-23 21:23:08,183 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:23:08,188 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 150 flow [2023-11-23 21:23:22,897 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 324405 states, 324316 states have (on average 5.716033128183623) internal successors, (1853801), 324404 states have internal predecessors, (1853801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:22,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:22,919 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;@7f4d1a6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:22,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-23 21:23:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 324405 states, 324316 states have (on average 5.716033128183623) internal successors, (1853801), 324404 states have internal predecessors, (1853801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:23:23,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:23,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:23,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-23 21:23:23,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1489579072, now seen corresponding path program 1 times [2023-11-23 21:23:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:23,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519069976] [2023-11-23 21:23:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:23:23,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:23,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519069976] [2023-11-23 21:23:23,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519069976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:23,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:23,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005759876] [2023-11-23 21:23:23,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:23,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:23,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:25,017 INFO L87 Difference]: Start difference. First operand has 324405 states, 324316 states have (on average 5.716033128183623) internal successors, (1853801), 324404 states have internal predecessors, (1853801), 0 states have call successors, (0), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:26,004 INFO L93 Difference]: Finished difference Result 75631 states and 374556 transitions. [2023-11-23 21:23:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:23:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:27,897 INFO L225 Difference]: With dead ends: 75631 [2023-11-23 21:23:27,897 INFO L226 Difference]: Without dead ends: 75631 [2023-11-23 21:23:27,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:27,899 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:27,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 6 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75631 states. [2023-11-23 21:23:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75631 to 75631. [2023-11-23 21:23:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75631 states, 75630 states have (on average 4.952479174930583) internal successors, (374556), 75630 states have internal predecessors, (374556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75631 states to 75631 states and 374556 transitions. [2023-11-23 21:23:32,581 INFO L78 Accepts]: Start accepts. Automaton has 75631 states and 374556 transitions. Word has length 8 [2023-11-23 21:23:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:32,581 INFO L495 AbstractCegarLoop]: Abstraction has 75631 states and 374556 transitions. [2023-11-23 21:23:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:23:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 75631 states and 374556 transitions. [2023-11-23 21:23:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:23:32,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:32,592 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:32,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:23:32,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-23 21:23:32,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 858081371, now seen corresponding path program 1 times [2023-11-23 21:23:32,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91497874] [2023-11-23 21:23:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:32,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:23:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:23:32,654 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:23:32,654 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:23:32,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-23 21:23:32,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-23 21:23:32,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-23 21:23:32,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-23 21:23:32,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-23 21:23:32,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-23 21:23:32,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-23 21:23:32,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:23:32,657 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 21:23:32,658 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 21:23:32,658 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-23 21:23:32,693 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 21:23:32,698 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 72 places, 65 transitions, 184 flow