./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/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_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/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_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/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 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:21:36,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:21:36,742 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:21:36,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:21:36,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:21:36,799 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:21:36,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:21:36,802 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:21:36,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:21:36,805 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:21:36,806 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:21:36,806 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:21:36,807 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:21:36,809 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:21:36,810 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:21:36,810 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:21:36,810 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:21:36,811 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:21:36,811 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:21:36,812 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:21:36,812 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:21:36,813 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:21:36,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:21:36,818 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:21:36,818 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:21:36,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:21:36,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:21:36,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:21:36,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:21:36,820 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:21:36,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:21:36,827 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:21:36,827 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:21:36,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:21:36,828 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:21:36,828 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:21:36,828 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:21:36,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:21:36,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:21:36,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:21:36,830 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:21:36,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:21:36,832 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:21:36,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:21:36,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:21:36,833 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:21:36,834 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:21:36,834 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_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d55d399b7f413c968459e57be858565c9c3a03797404fd2613513b79af9aeb3 [2024-11-02 11:21:37,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:21:37,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:21:37,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:21:37,211 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:21:37,212 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:21:37,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c Unable to find full path for "g++" [2024-11-02 11:21:39,542 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:21:39,815 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:21:39,816 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2024-11-02 11:21:39,837 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/data/f2714a082/75951706126e40d7b20d3ce1ca3cbdd2/FLAG2a6508f73 [2024-11-02 11:21:39,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/data/f2714a082/75951706126e40d7b20d3ce1ca3cbdd2 [2024-11-02 11:21:39,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:21:39,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:21:39,860 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:39,860 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:21:39,867 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:21:39,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:39" (1/1) ... [2024-11-02 11:21:39,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cabd3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:39, skipping insertion in model container [2024-11-02 11:21:39,870 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:21:39" (1/1) ... [2024-11-02 11:21:39,935 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:21:40,169 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_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[913,926] [2024-11-02 11:21:40,238 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_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[5977,5990] [2024-11-02 11:21:40,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:40,438 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:21:40,453 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_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[913,926] [2024-11-02 11:21:40,476 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_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-1.c[5977,5990] [2024-11-02 11:21:40,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:21:40,563 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:21:40,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40 WrapperNode [2024-11-02 11:21:40,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:21:40,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:40,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:21:40,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:21:40,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,591 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,650 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 903 [2024-11-02 11:21:40,651 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:21:40,652 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:21:40,652 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:21:40,652 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:21:40,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,751 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:21:40,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:21:40,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:21:40,761 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:21:40,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (1/1) ... [2024-11-02 11:21:40,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:21:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:40,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:21:40,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:21:40,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:21:40,836 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 11:21:40,837 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 11:21:40,837 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-02 11:21:40,837 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-02 11:21:40,837 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 11:21:40,837 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 11:21:40,837 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 11:21:40,838 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 11:21:40,838 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 11:21:40,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 11:21:40,838 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 11:21:40,838 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 11:21:40,838 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 11:21:40,838 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 11:21:40,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:21:40,839 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 11:21:40,839 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 11:21:40,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:21:40,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:21:40,839 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 11:21:40,840 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 11:21:40,977 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:21:40,979 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:21:42,229 INFO L? ?]: Removed 109 outVars from TransFormulas that were not future-live. [2024-11-02 11:21:42,230 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:21:42,798 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:21:42,798 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-02 11:21:42,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:42 BoogieIcfgContainer [2024-11-02 11:21:42,800 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:21:42,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:21:42,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:21:42,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:21:42,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:21:39" (1/3) ... [2024-11-02 11:21:42,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757fde40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:42, skipping insertion in model container [2024-11-02 11:21:42,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:21:40" (2/3) ... [2024-11-02 11:21:42,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757fde40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:21:42, skipping insertion in model container [2024-11-02 11:21:42,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:21:42" (3/3) ... [2024-11-02 11:21:42,815 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.09.cil-1.c [2024-11-02 11:21:42,837 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:21:42,838 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 11:21:42,932 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:21:42,942 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;@735a5021, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:21:42,942 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 11:21:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 216 states, 175 states have (on average 1.5257142857142858) internal successors, (267), 180 states have internal predecessors, (267), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-02 11:21:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 11:21:42,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:42,965 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 11:21:42,966 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:42,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash -520941215, now seen corresponding path program 1 times [2024-11-02 11:21:42,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:42,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460271822] [2024-11-02 11:21:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:43,492 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 11:21:43,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:43,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460271822] [2024-11-02 11:21:43,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460271822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:43,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:43,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088025051] [2024-11-02 11:21:43,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:43,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:43,539 INFO L87 Difference]: Start difference. First operand has 216 states, 175 states have (on average 1.5257142857142858) internal successors, (267), 180 states have internal predecessors, (267), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) 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 11:21:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:43,795 INFO L93 Difference]: Finished difference Result 465 states and 698 transitions. [2024-11-02 11:21:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:43,800 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 11:21:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:43,814 INFO L225 Difference]: With dead ends: 465 [2024-11-02 11:21:43,814 INFO L226 Difference]: Without dead ends: 249 [2024-11-02 11:21:43,821 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 11:21:43,827 INFO L432 NwaCegarLoop]: 275 mSDtfsCounter, 292 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:43,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 330 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-02 11:21:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2024-11-02 11:21:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 201 states have (on average 1.462686567164179) internal successors, (294), 204 states have internal predecessors, (294), 32 states have call successors, (32), 11 states have call predecessors, (32), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-02 11:21:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 356 transitions. [2024-11-02 11:21:43,916 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 356 transitions. Word has length 28 [2024-11-02 11:21:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:43,916 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 356 transitions. [2024-11-02 11:21:43,917 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 11:21:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 356 transitions. [2024-11-02 11:21:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 11:21:43,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:43,922 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 11:21:43,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:21:43,923 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:43,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1298367761, now seen corresponding path program 1 times [2024-11-02 11:21:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:43,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458229733] [2024-11-02 11:21:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:44,018 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 11:21:44,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458229733] [2024-11-02 11:21:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458229733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:44,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:44,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284205961] [2024-11-02 11:21:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:44,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:44,022 INFO L87 Difference]: Start difference. First operand 245 states and 356 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 11:21:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:44,189 INFO L93 Difference]: Finished difference Result 401 states and 573 transitions. [2024-11-02 11:21:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:44,190 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 11:21:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:44,192 INFO L225 Difference]: With dead ends: 401 [2024-11-02 11:21:44,192 INFO L226 Difference]: Without dead ends: 320 [2024-11-02 11:21:44,196 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 11:21:44,198 INFO L432 NwaCegarLoop]: 261 mSDtfsCounter, 290 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:44,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 314 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-02 11:21:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 316. [2024-11-02 11:21:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 261 states have (on average 1.4367816091954022) internal successors, (375), 264 states have internal predecessors, (375), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-02 11:21:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 451 transitions. [2024-11-02 11:21:44,250 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 451 transitions. Word has length 29 [2024-11-02 11:21:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:44,250 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 451 transitions. [2024-11-02 11:21:44,251 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 11:21:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 451 transitions. [2024-11-02 11:21:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 11:21:44,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:44,256 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 11:21:44,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:21:44,256 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:44,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1483748310, now seen corresponding path program 1 times [2024-11-02 11:21:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:44,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228157882] [2024-11-02 11:21:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:44,346 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 11:21:44,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228157882] [2024-11-02 11:21:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228157882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:44,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:44,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:44,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444171897] [2024-11-02 11:21:44,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:44,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:44,349 INFO L87 Difference]: Start difference. First operand 316 states and 451 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 11:21:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:44,575 INFO L93 Difference]: Finished difference Result 556 states and 779 transitions. [2024-11-02 11:21:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:44,576 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 11:21:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:44,582 INFO L225 Difference]: With dead ends: 556 [2024-11-02 11:21:44,582 INFO L226 Difference]: Without dead ends: 404 [2024-11-02 11:21:44,583 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 11:21:44,585 INFO L432 NwaCegarLoop]: 273 mSDtfsCounter, 46 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:44,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 519 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:21:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-02 11:21:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 390. [2024-11-02 11:21:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 324 states have (on average 1.4197530864197532) internal successors, (460), 329 states have internal predecessors, (460), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-02 11:21:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 548 transitions. [2024-11-02 11:21:44,647 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 548 transitions. Word has length 30 [2024-11-02 11:21:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:44,648 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 548 transitions. [2024-11-02 11:21:44,648 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 11:21:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 548 transitions. [2024-11-02 11:21:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 11:21:44,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:44,652 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 11:21:44,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:21:44,653 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:44,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash 458261836, now seen corresponding path program 1 times [2024-11-02 11:21:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:44,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511605258] [2024-11-02 11:21:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:44,756 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 11:21:44,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511605258] [2024-11-02 11:21:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511605258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:44,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035860287] [2024-11-02 11:21:44,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:44,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:44,759 INFO L87 Difference]: Start difference. First operand 390 states and 548 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 11:21:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:44,921 INFO L93 Difference]: Finished difference Result 553 states and 766 transitions. [2024-11-02 11:21:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:44,921 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 11:21:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:44,925 INFO L225 Difference]: With dead ends: 553 [2024-11-02 11:21:44,926 INFO L226 Difference]: Without dead ends: 395 [2024-11-02 11:21:44,926 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 11:21:44,928 INFO L432 NwaCegarLoop]: 294 mSDtfsCounter, 32 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:44,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 553 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-11-02 11:21:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 384. [2024-11-02 11:21:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 318 states have (on average 1.4025157232704402) internal successors, (446), 323 states have internal predecessors, (446), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-02 11:21:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 534 transitions. [2024-11-02 11:21:44,954 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 534 transitions. Word has length 43 [2024-11-02 11:21:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:44,955 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 534 transitions. [2024-11-02 11:21:44,955 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 11:21:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 534 transitions. [2024-11-02 11:21:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 11:21:44,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:44,957 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 11:21:44,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:21:44,958 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:44,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1168074753, now seen corresponding path program 1 times [2024-11-02 11:21:44,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:44,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036400979] [2024-11-02 11:21:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:44,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:45,009 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 11:21:45,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:45,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036400979] [2024-11-02 11:21:45,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036400979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:45,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:45,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:21:45,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449367023] [2024-11-02 11:21:45,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:45,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:21:45,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:21:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:21:45,012 INFO L87 Difference]: Start difference. First operand 384 states and 534 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 11:21:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:45,155 INFO L93 Difference]: Finished difference Result 633 states and 858 transitions. [2024-11-02 11:21:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:21:45,156 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 11:21:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:45,158 INFO L225 Difference]: With dead ends: 633 [2024-11-02 11:21:45,159 INFO L226 Difference]: Without dead ends: 430 [2024-11-02 11:21:45,159 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 11:21:45,160 INFO L432 NwaCegarLoop]: 261 mSDtfsCounter, 276 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 313 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 11:21:45,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 313 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:21:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-02 11:21:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2024-11-02 11:21:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.3697478991596639) internal successors, (489), 362 states have internal predecessors, (489), 49 states have call successors, (49), 23 states have call predecessors, (49), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-02 11:21:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 585 transitions. [2024-11-02 11:21:45,189 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 585 transitions. Word has length 46 [2024-11-02 11:21:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:45,190 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 585 transitions. [2024-11-02 11:21:45,190 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 11:21:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 585 transitions. [2024-11-02 11:21:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 11:21:45,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:45,191 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 11:21:45,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:21:45,192 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:45,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:45,192 INFO L85 PathProgramCache]: Analyzing trace with hash 544686319, now seen corresponding path program 1 times [2024-11-02 11:21:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:45,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447776447] [2024-11-02 11:21:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:45,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:45,347 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 11:21:45,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:45,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447776447] [2024-11-02 11:21:45,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447776447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:21:45,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:21:45,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:21:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684471449] [2024-11-02 11:21:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:21:45,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:21:45,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:21:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:21:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:21:45,350 INFO L87 Difference]: Start difference. First operand 430 states and 585 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 11:21:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:21:45,710 INFO L93 Difference]: Finished difference Result 470 states and 632 transitions. [2024-11-02 11:21:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:21:45,711 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 11:21:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:21:45,714 INFO L225 Difference]: With dead ends: 470 [2024-11-02 11:21:45,714 INFO L226 Difference]: Without dead ends: 467 [2024-11-02 11:21:45,715 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 11:21:45,716 INFO L432 NwaCegarLoop]: 271 mSDtfsCounter, 508 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:21:45,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 312 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:21:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2024-11-02 11:21:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 429. [2024-11-02 11:21:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 357 states have (on average 1.3641456582633054) internal successors, (487), 361 states have internal predecessors, (487), 48 states have call successors, (48), 23 states have call predecessors, (48), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-02 11:21:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 582 transitions. [2024-11-02 11:21:45,756 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 582 transitions. Word has length 47 [2024-11-02 11:21:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:21:45,757 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 582 transitions. [2024-11-02 11:21:45,757 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 11:21:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 582 transitions. [2024-11-02 11:21:45,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 11:21:45,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:21:45,759 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 11:21:45,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:21:45,759 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:21:45,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:21:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash -295775932, now seen corresponding path program 1 times [2024-11-02 11:21:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:21:45,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018969215] [2024-11-02 11:21:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:21:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:45,945 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 11:21:45,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:21:45,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018969215] [2024-11-02 11:21:45,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018969215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:21:45,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520175146] [2024-11-02 11:21:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:21:45,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:21:45,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:21:45,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:21:45,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef9826e3-5953-4f56-832c-a7e6f1ea0e00/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:21:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:21:46,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 11:21:46,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:21:46,480 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 11:21:46,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:21:46,595 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 11:21:46,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520175146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:21:46,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334784989] [2024-11-02 11:21:46,618 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-02 11:21:46,618 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:21:46,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:21:46,631 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:21:46,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:21:55,539 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 151 for LOIs [2024-11-02 11:21:55,591 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 176 for LOIs [2024-11-02 11:21:55,686 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 185 for LOIs [2024-11-02 11:21:57,592 INFO L180 IcfgInterpreter]: Interpretation finished