./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2 --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 43061c6fd2cf55dd1721985927e668f0444e5f80f3517bfb8a4405f126e779da --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:42,526 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:36:42,605 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:36:42,613 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:36:42,615 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:36:42,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:36:42,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:36:42,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:36:42,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:36:42,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:36:42,642 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:36:42,643 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:36:42,643 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:36:42,644 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:36:42,646 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:36:42,647 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:36:42,647 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:36:42,647 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:36:42,648 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:36:42,648 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:36:42,649 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:36:42,653 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:36:42,654 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:36:42,654 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:36:42,654 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:36:42,655 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:36:42,655 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:36:42,655 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:36:42,655 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:36:42,656 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:36:42,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:36:42,656 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:36:42,657 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:36:42,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:36:42,657 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:36:42,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:36:42,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:36:42,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:36:42,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:42,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:36:42,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:36:42,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:36:42,661 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:36:42,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:36:42,662 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:36:42,662 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:36:42,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:36:42,662 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_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43061c6fd2cf55dd1721985927e668f0444e5f80f3517bfb8a4405f126e779da [2024-11-02 12:36:43,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:36:43,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:36:43,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:36:43,065 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:36:43,066 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:36:43,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c Unable to find full path for "g++" [2024-11-02 12:36:45,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:45,649 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:45,650 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2024-11-02 12:36:45,683 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/data/63f8a9f74/4920716043e841578141226cd59900ad/FLAG04168c235 [2024-11-02 12:36:45,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/data/63f8a9f74/4920716043e841578141226cd59900ad [2024-11-02 12:36:45,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:45,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:45,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:45,982 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:45,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:45,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237ef772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45, skipping insertion in model container [2024-11-02 12:36:45,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:46,054 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:46,263 WARN L251 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_db967740-d8ae-41e9-8ea1-83e06eae8573/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[913,926] [2024-11-02 12:36:46,334 WARN L251 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_db967740-d8ae-41e9-8ea1-83e06eae8573/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[5977,5990] [2024-11-02 12:36:46,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:46,504 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:46,520 WARN L251 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_db967740-d8ae-41e9-8ea1-83e06eae8573/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[913,926] [2024-11-02 12:36:46,550 WARN L251 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_db967740-d8ae-41e9-8ea1-83e06eae8573/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[5977,5990] [2024-11-02 12:36:46,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:46,661 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:46,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46 WrapperNode [2024-11-02 12:36:46,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:46,662 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:46,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:46,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:46,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,689 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,747 INFO L138 Inliner]: procedures = 66, calls = 76, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 909 [2024-11-02 12:36:46,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:46,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:46,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:46,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:46,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,764 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,793 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,826 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:46,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:46,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:46,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:46,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (1/1) ... [2024-11-02 12:36:46,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:46,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:46,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:46,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:36:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:36:46,920 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:36:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-02 12:36:46,920 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-02 12:36:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:36:46,920 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:36:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:36:46,921 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:36:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:36:46,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:36:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:36:46,921 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:36:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:36:46,921 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:36:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:36:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:36:46,922 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:36:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:46,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:36:46,922 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:36:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 12:36:46,922 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 12:36:47,098 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:47,101 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:48,279 INFO L? ?]: Removed 113 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:48,279 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:48,916 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:48,916 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-02 12:36:48,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:48 BoogieIcfgContainer [2024-11-02 12:36:48,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:48,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:48,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:48,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:48,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:45" (1/3) ... [2024-11-02 12:36:48,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ca567a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:48, skipping insertion in model container [2024-11-02 12:36:48,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:46" (2/3) ... [2024-11-02 12:36:48,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ca567a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:48, skipping insertion in model container [2024-11-02 12:36:48,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:48" (3/3) ... [2024-11-02 12:36:48,932 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2024-11-02 12:36:48,954 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:48,954 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:36:49,122 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:49,134 INFO L333 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, 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;@7600324c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:49,134 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:36:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 185 states have internal predecessors, (273), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-02 12:36:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 12:36:49,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:49,156 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:49,157 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:49,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1823323180, now seen corresponding path program 1 times [2024-11-02 12:36:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:49,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291557346] [2024-11-02 12:36:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:49,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:49,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291557346] [2024-11-02 12:36:49,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291557346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:49,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:49,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:49,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913254753] [2024-11-02 12:36:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:49,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:49,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:49,667 INFO L87 Difference]: Start difference. First operand has 222 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 185 states have internal predecessors, (273), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:49,922 INFO L93 Difference]: Finished difference Result 476 states and 718 transitions. [2024-11-02 12:36:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-02 12:36:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:49,936 INFO L225 Difference]: With dead ends: 476 [2024-11-02 12:36:49,937 INFO L226 Difference]: Without dead ends: 254 [2024-11-02 12:36:49,942 INFO L431 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 [2024-11-02 12:36:49,948 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 300 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:49,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 337 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-02 12:36:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2024-11-02 12:36:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 204 states have (on average 1.4705882352941178) internal successors, (300), 208 states have internal predecessors, (300), 34 states have call successors, (34), 12 states have call predecessors, (34), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-02 12:36:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 364 transitions. [2024-11-02 12:36:50,028 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 364 transitions. Word has length 28 [2024-11-02 12:36:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:50,033 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 364 transitions. [2024-11-02 12:36:50,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 364 transitions. [2024-11-02 12:36:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 12:36:50,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:50,035 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:50,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:36:50,036 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:50,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1755899894, now seen corresponding path program 1 times [2024-11-02 12:36:50,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:50,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526906942] [2024-11-02 12:36:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:50,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:50,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:50,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526906942] [2024-11-02 12:36:50,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526906942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:50,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:50,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20936296] [2024-11-02 12:36:50,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:50,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:50,125 INFO L87 Difference]: Start difference. First operand 250 states and 364 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:50,252 INFO L93 Difference]: Finished difference Result 406 states and 581 transitions. [2024-11-02 12:36:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:50,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-02 12:36:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:50,256 INFO L225 Difference]: With dead ends: 406 [2024-11-02 12:36:50,256 INFO L226 Difference]: Without dead ends: 325 [2024-11-02 12:36:50,257 INFO L431 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 [2024-11-02 12:36:50,258 INFO L432 NwaCegarLoop]: 268 mSDtfsCounter, 298 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:50,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 321 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-02 12:36:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2024-11-02 12:36:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 264 states have (on average 1.4431818181818181) internal successors, (381), 268 states have internal predecessors, (381), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-02 12:36:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 459 transitions. [2024-11-02 12:36:50,304 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 459 transitions. Word has length 29 [2024-11-02 12:36:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:50,304 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 459 transitions. [2024-11-02 12:36:50,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 459 transitions. [2024-11-02 12:36:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 12:36:50,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:50,307 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:50,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:36:50,308 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:50,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -696593272, now seen corresponding path program 1 times [2024-11-02 12:36:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032164700] [2024-11-02 12:36:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:50,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032164700] [2024-11-02 12:36:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032164700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:50,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852374284] [2024-11-02 12:36:50,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:50,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:50,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:50,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:50,448 INFO L87 Difference]: Start difference. First operand 321 states and 459 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:50,615 INFO L93 Difference]: Finished difference Result 561 states and 787 transitions. [2024-11-02 12:36:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-02 12:36:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:50,619 INFO L225 Difference]: With dead ends: 561 [2024-11-02 12:36:50,621 INFO L226 Difference]: Without dead ends: 409 [2024-11-02 12:36:50,623 INFO L431 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 [2024-11-02 12:36:50,626 INFO L432 NwaCegarLoop]: 280 mSDtfsCounter, 46 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:50,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 533 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-02 12:36:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 395. [2024-11-02 12:36:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 327 states have (on average 1.4250764525993884) internal successors, (466), 333 states have internal predecessors, (466), 47 states have call successors, (47), 21 states have call predecessors, (47), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-02 12:36:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 556 transitions. [2024-11-02 12:36:50,675 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 556 transitions. Word has length 30 [2024-11-02 12:36:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:50,676 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 556 transitions. [2024-11-02 12:36:50,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:36:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 556 transitions. [2024-11-02 12:36:50,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 12:36:50,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:50,682 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:50,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:36:50,683 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:50,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1028760407, now seen corresponding path program 1 times [2024-11-02 12:36:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:50,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801142619] [2024-11-02 12:36:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:50,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:36:50,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:50,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801142619] [2024-11-02 12:36:50,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801142619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:50,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:50,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436631676] [2024-11-02 12:36:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:50,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:50,836 INFO L87 Difference]: Start difference. First operand 395 states and 556 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:51,002 INFO L93 Difference]: Finished difference Result 558 states and 774 transitions. [2024-11-02 12:36:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-02 12:36:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:51,009 INFO L225 Difference]: With dead ends: 558 [2024-11-02 12:36:51,009 INFO L226 Difference]: Without dead ends: 400 [2024-11-02 12:36:51,010 INFO L431 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 [2024-11-02 12:36:51,013 INFO L432 NwaCegarLoop]: 301 mSDtfsCounter, 32 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:51,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 567 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-11-02 12:36:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 389. [2024-11-02 12:36:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 321 states have (on average 1.4080996884735202) internal successors, (452), 327 states have internal predecessors, (452), 47 states have call successors, (47), 21 states have call predecessors, (47), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-02 12:36:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 542 transitions. [2024-11-02 12:36:51,046 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 542 transitions. Word has length 43 [2024-11-02 12:36:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:51,048 INFO L471 AbstractCegarLoop]: Abstraction has 389 states and 542 transitions. [2024-11-02 12:36:51,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 542 transitions. [2024-11-02 12:36:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:36:51,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:51,053 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:51,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:36:51,053 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:51,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash -290784789, now seen corresponding path program 1 times [2024-11-02 12:36:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:51,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235731948] [2024-11-02 12:36:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:36:51,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:51,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235731948] [2024-11-02 12:36:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235731948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:51,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:51,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858196196] [2024-11-02 12:36:51,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:51,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:51,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:51,144 INFO L87 Difference]: Start difference. First operand 389 states and 542 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:36:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:51,328 INFO L93 Difference]: Finished difference Result 638 states and 866 transitions. [2024-11-02 12:36:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:51,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-02 12:36:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:51,333 INFO L225 Difference]: With dead ends: 638 [2024-11-02 12:36:51,333 INFO L226 Difference]: Without dead ends: 435 [2024-11-02 12:36:51,335 INFO L431 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 [2024-11-02 12:36:51,336 INFO L432 NwaCegarLoop]: 268 mSDtfsCounter, 284 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:51,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 320 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2024-11-02 12:36:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2024-11-02 12:36:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 360 states have (on average 1.375) internal successors, (495), 366 states have internal predecessors, (495), 51 states have call successors, (51), 24 states have call predecessors, (51), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-02 12:36:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 593 transitions. [2024-11-02 12:36:51,392 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 593 transitions. Word has length 46 [2024-11-02 12:36:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:51,393 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 593 transitions. [2024-11-02 12:36:51,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:36:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 593 transitions. [2024-11-02 12:36:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:36:51,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:51,395 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:51,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:36:51,396 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:51,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1615350144, now seen corresponding path program 1 times [2024-11-02 12:36:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508055537] [2024-11-02 12:36:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:36:51,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:51,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508055537] [2024-11-02 12:36:51,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508055537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:51,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:51,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466183844] [2024-11-02 12:36:51,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:51,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:51,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:51,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:51,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:51,477 INFO L87 Difference]: Start difference. First operand 435 states and 593 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:36:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:51,804 INFO L93 Difference]: Finished difference Result 662 states and 893 transitions. [2024-11-02 12:36:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-11-02 12:36:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:51,808 INFO L225 Difference]: With dead ends: 662 [2024-11-02 12:36:51,808 INFO L226 Difference]: Without dead ends: 433 [2024-11-02 12:36:51,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:51,810 INFO L432 NwaCegarLoop]: 299 mSDtfsCounter, 339 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:51,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 532 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:36:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2024-11-02 12:36:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2024-11-02 12:36:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 356 states have (on average 1.345505617977528) internal successors, (479), 362 states have internal predecessors, (479), 51 states have call successors, (51), 24 states have call predecessors, (51), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-02 12:36:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 577 transitions. [2024-11-02 12:36:51,845 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 577 transitions. Word has length 47 [2024-11-02 12:36:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:51,846 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 577 transitions. [2024-11-02 12:36:51,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:36:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 577 transitions. [2024-11-02 12:36:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:36:51,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:51,848 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:51,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:36:51,848 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:51,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:51,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1806778497, now seen corresponding path program 1 times [2024-11-02 12:36:51,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:51,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129368650] [2024-11-02 12:36:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:51,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:36:51,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129368650] [2024-11-02 12:36:51,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129368650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:51,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:51,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934762479] [2024-11-02 12:36:51,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:51,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:51,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:51,961 INFO L87 Difference]: Start difference. First operand 431 states and 577 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:52,303 INFO L93 Difference]: Finished difference Result 467 states and 618 transitions. [2024-11-02 12:36:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-02 12:36:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:52,307 INFO L225 Difference]: With dead ends: 467 [2024-11-02 12:36:52,307 INFO L226 Difference]: Without dead ends: 464 [2024-11-02 12:36:52,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:52,308 INFO L432 NwaCegarLoop]: 275 mSDtfsCounter, 516 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:52,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 314 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-11-02 12:36:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 430. [2024-11-02 12:36:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 356 states have (on average 1.3398876404494382) internal successors, (477), 361 states have internal predecessors, (477), 50 states have call successors, (50), 24 states have call predecessors, (50), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-02 12:36:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 574 transitions. [2024-11-02 12:36:52,346 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 574 transitions. Word has length 47 [2024-11-02 12:36:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:52,347 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 574 transitions. [2024-11-02 12:36:52,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:36:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 574 transitions. [2024-11-02 12:36:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 12:36:52,348 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:52,348 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:52,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:36:52,349 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:52,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash -176768946, now seen corresponding path program 1 times [2024-11-02 12:36:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:52,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128018549] [2024-11-02 12:36:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:52,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:36:52,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128018549] [2024-11-02 12:36:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128018549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922307256] [2024-11-02 12:36:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:52,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:52,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:52,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:52,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db967740-d8ae-41e9-8ea1-83e06eae8573/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:36:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:52,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:36:52,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:53,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:36:53,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922307256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38448252] [2024-11-02 12:36:53,221 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-02 12:36:53,221 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:53,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:53,232 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:53,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:01,919 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 151 for LOIs [2024-11-02 12:37:01,978 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 176 for LOIs [2024-11-02 12:37:02,037 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 162 for LOIs [2024-11-02 12:37:04,659 INFO L180 IcfgInterpreter]: Interpretation finished