./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas.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_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/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_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/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_43e3bea5-045c-4646-be58-3ffcf6e35f63/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 fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:51:50,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:51:50,805 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:51:50,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:51:50,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:51:50,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:51:50,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:51:50,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:51:50,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:51:50,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:51:50,842 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:51:50,842 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:51:50,843 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:51:50,843 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:51:50,844 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:51:50,844 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:51:50,845 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:51:50,845 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:51:50,846 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:51:50,846 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:51:50,847 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:51:50,847 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:51:50,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:51:50,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:51:50,849 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:51:50,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:51:50,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:51:50,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:51:50,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:51:50,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:51:50,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:51:50,852 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:51:50,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:51:50,852 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:51:50,852 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:51:50,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:51:50,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:50,853 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:51:50,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:51:50,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:51:50,854 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:51:50,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:51:50,854 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:51:50,855 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:51:50,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:51:50,855 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_43e3bea5-045c-4646-be58-3ffcf6e35f63/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d [2023-11-12 00:51:51,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:51:51,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:51:51,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:51:51,161 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:51:51,161 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:51:51,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-ext/26_stack_cas.i [2023-11-12 00:51:54,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:51:54,819 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:51:54,828 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/sv-benchmarks/c/pthread-ext/26_stack_cas.i [2023-11-12 00:51:54,846 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/data/536236a04/a268991af44a445aa339af1ed0c7b95e/FLAG7ae90e48a [2023-11-12 00:51:54,860 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/data/536236a04/a268991af44a445aa339af1ed0c7b95e [2023-11-12 00:51:54,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:51:54,867 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:51:54,870 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:54,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:51:54,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:51:54,879 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:54" (1/1) ... [2023-11-12 00:51:54,880 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5898c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:54, skipping insertion in model container [2023-11-12 00:51:54,880 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:54" (1/1) ... [2023-11-12 00:51:54,945 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:51:55,469 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_43e3bea5-045c-4646-be58-3ffcf6e35f63/sv-benchmarks/c/pthread-ext/26_stack_cas.i[31152,31165] [2023-11-12 00:51:55,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:55,502 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:51:55,575 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_43e3bea5-045c-4646-be58-3ffcf6e35f63/sv-benchmarks/c/pthread-ext/26_stack_cas.i[31152,31165] [2023-11-12 00:51:55,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:55,650 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:51:55,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55 WrapperNode [2023-11-12 00:51:55,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:55,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:55,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:51:55,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:51:55,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,753 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 187 [2023-11-12 00:51:55,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:55,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:51:55,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:51:55,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:51:55,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,790 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,819 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:51:55,827 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:51:55,827 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:51:55,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:51:55,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (1/1) ... [2023-11-12 00:51:55,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:55,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:55,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:51:55,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e3bea5-045c-4646-be58-3ffcf6e35f63/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:51:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:51:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 00:51:55,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 00:51:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:51:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:51:55,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:51:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:51:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:51:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:51:55,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:51:55,961 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 00:51:56,128 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:51:56,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:51:56,540 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:51:56,775 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:51:56,775 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:51:56,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:56 BoogieIcfgContainer [2023-11-12 00:51:56,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:51:56,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:51:56,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:51:56,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:51:56,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:51:54" (1/3) ... [2023-11-12 00:51:56,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b21a315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:56, skipping insertion in model container [2023-11-12 00:51:56,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:55" (2/3) ... [2023-11-12 00:51:56,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b21a315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:56, skipping insertion in model container [2023-11-12 00:51:56,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:56" (3/3) ... [2023-11-12 00:51:56,789 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-11-12 00:51:56,800 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 00:51:56,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:51:56,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:51:56,813 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:51:56,901 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:51:56,939 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:51:56,956 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 117 transitions, 238 flow [2023-11-12 00:51:56,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 117 transitions, 238 flow [2023-11-12 00:51:56,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 117 transitions, 238 flow [2023-11-12 00:51:57,023 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-11-12 00:51:57,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:51:57,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 133 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 94. Up to 4 conditions per place. [2023-11-12 00:51:57,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-11-12 00:52:01,610 INFO L134 LiptonReduction]: Checked pairs total: 2196 [2023-11-12 00:52:01,611 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-11-12 00:52:01,621 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 26 transitions, 56 flow [2023-11-12 00:52:01,650 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 72 states, 69 states have (on average 2.260869565217391) internal successors, (156), 71 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 00:52:01,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:52:01,682 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;@50c43deb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:52:01,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 00:52:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 69 states have (on average 2.260869565217391) internal successors, (156), 71 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 00:52:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:52:01,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:01,693 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 00:52:01,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:52:01,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1710639523, now seen corresponding path program 1 times [2023-11-12 00:52:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:01,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965268822] [2023-11-12 00:52:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:01,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:52:01,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:52:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:52:01,952 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:52:01,953 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:52:01,954 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-12 00:52:01,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-12 00:52:01,956 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-12 00:52:01,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:52:01,958 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 00:52:01,961 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:52:01,961 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 00:52:02,038 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:52:02,042 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:52:02,043 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 199 transitions, 408 flow [2023-11-12 00:52:02,044 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 199 transitions, 408 flow [2023-11-12 00:52:02,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 199 transitions, 408 flow [2023-11-12 00:52:02,151 INFO L124 PetriNetUnfolderBase]: 21/223 cut-off events. [2023-11-12 00:52:02,152 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:52:02,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 223 events. 21/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 449 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 175. Up to 6 conditions per place. [2023-11-12 00:52:02,175 INFO L119 LiptonReduction]: Number of co-enabled transitions 17820 [2023-11-12 00:52:08,623 INFO L134 LiptonReduction]: Checked pairs total: 31698 [2023-11-12 00:52:08,623 INFO L136 LiptonReduction]: Total number of compositions: 175 [2023-11-12 00:52:08,625 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 64 transitions, 138 flow [2023-11-12 00:52:08,805 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3015 states, 3007 states have (on average 3.344529431326904) internal successors, (10057), 3014 states have internal predecessors, (10057), 0 states have call successors, (0), 0 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 00:52:08,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:52:08,808 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;@50c43deb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:52:08,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 00:52:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 3015 states, 3007 states have (on average 3.344529431326904) internal successors, (10057), 3014 states have internal predecessors, (10057), 0 states have call successors, (0), 0 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 00:52:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:52:08,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:08,826 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 00:52:08,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-12 00:52:08,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 554782975, now seen corresponding path program 1 times [2023-11-12 00:52:08,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:08,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997044138] [2023-11-12 00:52:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:52:08,866 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:52:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:52:08,896 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:52:08,896 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:52:08,897 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 00:52:08,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 00:52:08,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 00:52:08,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 00:52:08,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:52:08,899 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 00:52:08,899 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:52:08,899 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 00:52:08,979 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:52:08,985 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:52:08,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 281 transitions, 580 flow [2023-11-12 00:52:08,986 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 281 transitions, 580 flow [2023-11-12 00:52:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 281 transitions, 580 flow [2023-11-12 00:52:09,076 INFO L124 PetriNetUnfolderBase]: 31/318 cut-off events. [2023-11-12 00:52:09,076 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 00:52:09,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 31/318 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 872 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 256. Up to 8 conditions per place. [2023-11-12 00:52:09,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 46656 [2023-11-12 00:52:29,459 INFO L134 LiptonReduction]: Checked pairs total: 80965 [2023-11-12 00:52:29,460 INFO L136 LiptonReduction]: Total number of compositions: 243 [2023-11-12 00:52:29,462 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 80 places, 94 transitions, 206 flow [2023-11-12 00:52:33,485 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 69432 states, 69413 states have (on average 4.596689380951695) internal successors, (319070), 69431 states have internal predecessors, (319070), 0 states have call successors, (0), 0 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 00:52:33,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:52:33,490 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;@50c43deb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:52:33,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 00:52:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 69432 states, 69413 states have (on average 4.596689380951695) internal successors, (319070), 69431 states have internal predecessors, (319070), 0 states have call successors, (0), 0 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 00:52:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:52:33,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:52:33,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:52:33,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 00:52:33,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:52:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash -549895121, now seen corresponding path program 1 times [2023-11-12 00:52:33,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:52:33,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706940450] [2023-11-12 00:52:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:52:33,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:52:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:52:34,250 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 00:52:34,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:52:34,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706940450] [2023-11-12 00:52:34,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706940450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:52:34,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:52:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:52:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073983157] [2023-11-12 00:52:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:52:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:52:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:52:34,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:52:34,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:52:34,446 INFO L87 Difference]: Start difference. First operand has 69432 states, 69413 states have (on average 4.596689380951695) internal successors, (319070), 69431 states have internal predecessors, (319070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 00:52:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:52:38,112 INFO L93 Difference]: Finished difference Result 69423 states and 295592 transitions. [2023-11-12 00:52:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:52:38,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 00:52:38,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:52:39,941 INFO L225 Difference]: With dead ends: 69423 [2023-11-12 00:52:39,941 INFO L226 Difference]: Without dead ends: 69423 [2023-11-12 00:52:39,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:52:39,947 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 197 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:52:39,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 70 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:52:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69423 states.