./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.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_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/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_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/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_5465e212-6157-4ab9-80d0-e11489a5264c/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 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:25:08,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:25:08,749 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:25:08,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:25:08,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:25:08,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:25:08,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:25:08,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:25:08,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:25:08,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:25:08,781 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:25:08,782 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:25:08,782 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:25:08,787 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:25:08,787 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:25:08,787 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:25:08,788 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:25:08,788 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:25:08,788 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:25:08,788 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:25:08,789 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:25:08,789 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:25:08,790 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:25:08,790 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:25:08,791 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:25:08,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:25:08,791 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:25:08,791 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:25:08,792 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:25:08,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:25:08,792 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:25:08,792 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:25:08,793 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:25:08,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:25:08,797 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:25:08,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:25:08,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:25:08,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:25:08,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:25:08,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:25:08,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:25:08,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:25:08,800 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:25:08,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:25:08,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:25:08,801 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:25:08,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:25:08,801 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_5465e212-6157-4ab9-80d0-e11489a5264c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 [2024-11-02 12:25:09,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:25:09,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:25:09,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:25:09,228 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:25:09,228 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:25:09,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c Unable to find full path for "g++" [2024-11-02 12:25:11,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:25:11,400 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:25:11,400 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2024-11-02 12:25:11,415 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/data/093cb2078/ac32eea41efb46b6b46a82ae1deb881d/FLAGf1b89a165 [2024-11-02 12:25:11,435 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/data/093cb2078/ac32eea41efb46b6b46a82ae1deb881d [2024-11-02 12:25:11,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:25:11,441 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:25:11,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:25:11,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:25:11,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:25:11,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:11,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fcedd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11, skipping insertion in model container [2024-11-02 12:25:11,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:11,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:25:11,739 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_5465e212-6157-4ab9-80d0-e11489a5264c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2024-11-02 12:25:11,809 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_5465e212-6157-4ab9-80d0-e11489a5264c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2024-11-02 12:25:11,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:25:11,869 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:25:11,882 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_5465e212-6157-4ab9-80d0-e11489a5264c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2024-11-02 12:25:11,905 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_5465e212-6157-4ab9-80d0-e11489a5264c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2024-11-02 12:25:11,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:25:11,961 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:25:11,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11 WrapperNode [2024-11-02 12:25:11,962 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:25:11,963 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:25:11,963 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:25:11,963 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:25:11,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:11,981 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,036 INFO L138 Inliner]: procedures = 57, calls = 63, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 468 [2024-11-02 12:25:12,036 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:25:12,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:25:12,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:25:12,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:25:12,047 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,051 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,051 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,076 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:25:12,077 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:25:12,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:25:12,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:25:12,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (1/1) ... [2024-11-02 12:25:12,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:25:12,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:12,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:25:12,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:25:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:25:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:25:12,156 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:25:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 12:25:12,156 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 12:25:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:25:12,156 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:25:12,157 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:25:12,157 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:25:12,157 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 12:25:12,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 12:25:12,157 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:25:12,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:25:12,158 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:25:12,158 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:25:12,158 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 12:25:12,158 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 12:25:12,158 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 12:25:12,158 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 12:25:12,158 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 12:25:12,159 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 12:25:12,159 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:25:12,159 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:25:12,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:25:12,159 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:25:12,159 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:25:12,160 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 12:25:12,160 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 12:25:12,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:25:12,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:25:12,160 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:25:12,160 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:25:12,265 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:25:12,269 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:25:13,126 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-11-02 12:25:13,127 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:25:13,374 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:25:13,374 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-02 12:25:13,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:25:13 BoogieIcfgContainer [2024-11-02 12:25:13,376 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:25:13,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:25:13,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:25:13,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:25:13,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:25:11" (1/3) ... [2024-11-02 12:25:13,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64857aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:25:13, skipping insertion in model container [2024-11-02 12:25:13,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:11" (2/3) ... [2024-11-02 12:25:13,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64857aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:25:13, skipping insertion in model container [2024-11-02 12:25:13,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:25:13" (3/3) ... [2024-11-02 12:25:13,388 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2024-11-02 12:25:13,407 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:25:13,408 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:25:13,545 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:25:13,569 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;@2273a5ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:25:13,569 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:25:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 106 states have (on average 1.471698113207547) internal successors, (156), 112 states have internal predecessors, (156), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-02 12:25:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-02 12:25:13,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:13,601 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:13,602 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:13,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1558148514, now seen corresponding path program 1 times [2024-11-02 12:25:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:13,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072692890] [2024-11-02 12:25:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:14,149 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 12:25:14,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:14,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072692890] [2024-11-02 12:25:14,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072692890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:14,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:25:14,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427322060] [2024-11-02 12:25:14,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:14,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:25:14,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:25:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:25:14,195 INFO L87 Difference]: Start difference. First operand has 153 states, 106 states have (on average 1.471698113207547) internal successors, (156), 112 states have internal predecessors, (156), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:25:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:15,211 INFO L93 Difference]: Finished difference Result 575 states and 841 transitions. [2024-11-02 12:25:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:25:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2024-11-02 12:25:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:15,229 INFO L225 Difference]: With dead ends: 575 [2024-11-02 12:25:15,229 INFO L226 Difference]: Without dead ends: 417 [2024-11-02 12:25:15,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:25:15,242 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 550 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:15,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 527 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:25:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-11-02 12:25:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 406. [2024-11-02 12:25:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 292 states have (on average 1.356164383561644) internal successors, (396), 299 states have internal predecessors, (396), 75 states have call successors, (75), 38 states have call predecessors, (75), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2024-11-02 12:25:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 566 transitions. [2024-11-02 12:25:15,398 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 566 transitions. Word has length 37 [2024-11-02 12:25:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:15,401 INFO L471 AbstractCegarLoop]: Abstraction has 406 states and 566 transitions. [2024-11-02 12:25:15,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:25:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 566 transitions. [2024-11-02 12:25:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:25:15,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:15,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:15,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:25:15,407 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:15,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash -619495534, now seen corresponding path program 1 times [2024-11-02 12:25:15,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:15,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097530430] [2024-11-02 12:25:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:15,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:15,609 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 12:25:15,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097530430] [2024-11-02 12:25:15,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097530430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:15,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:25:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158594557] [2024-11-02 12:25:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:15,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:25:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:25:15,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:15,617 INFO L87 Difference]: Start difference. First operand 406 states and 566 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:25:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:15,943 INFO L93 Difference]: Finished difference Result 530 states and 728 transitions. [2024-11-02 12:25:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:25:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 12:25:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:15,954 INFO L225 Difference]: With dead ends: 530 [2024-11-02 12:25:15,954 INFO L226 Difference]: Without dead ends: 466 [2024-11-02 12:25:15,955 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 12:25:15,956 INFO L432 NwaCegarLoop]: 223 mSDtfsCounter, 256 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:15,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 368 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:25:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2024-11-02 12:25:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 459. [2024-11-02 12:25:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 330 states have (on average 1.3424242424242425) internal successors, (443), 337 states have internal predecessors, (443), 83 states have call successors, (83), 45 states have call predecessors, (83), 44 states have return successors, (103), 78 states have call predecessors, (103), 81 states have call successors, (103) [2024-11-02 12:25:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 629 transitions. [2024-11-02 12:25:16,043 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 629 transitions. Word has length 45 [2024-11-02 12:25:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:16,043 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 629 transitions. [2024-11-02 12:25:16,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:25:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 629 transitions. [2024-11-02 12:25:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:25:16,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:16,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:16,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:25:16,049 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:16,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 299479089, now seen corresponding path program 1 times [2024-11-02 12:25:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771585670] [2024-11-02 12:25:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:16,235 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 12:25:16,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:16,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771585670] [2024-11-02 12:25:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771585670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:16,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:16,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:25:16,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774213661] [2024-11-02 12:25:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:16,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:25:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:16,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:25:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:25:16,242 INFO L87 Difference]: Start difference. First operand 459 states and 629 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:25:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:17,053 INFO L93 Difference]: Finished difference Result 861 states and 1132 transitions. [2024-11-02 12:25:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:25:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 12:25:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:17,064 INFO L225 Difference]: With dead ends: 861 [2024-11-02 12:25:17,064 INFO L226 Difference]: Without dead ends: 729 [2024-11-02 12:25:17,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:25:17,069 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 594 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:17,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 696 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:25:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2024-11-02 12:25:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 645. [2024-11-02 12:25:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 462 states have (on average 1.3051948051948052) internal successors, (603), 470 states have internal predecessors, (603), 110 states have call successors, (110), 68 states have call predecessors, (110), 71 states have return successors, (134), 108 states have call predecessors, (134), 108 states have call successors, (134) [2024-11-02 12:25:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 847 transitions. [2024-11-02 12:25:17,167 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 847 transitions. Word has length 45 [2024-11-02 12:25:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:17,168 INFO L471 AbstractCegarLoop]: Abstraction has 645 states and 847 transitions. [2024-11-02 12:25:17,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:25:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 847 transitions. [2024-11-02 12:25:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:25:17,170 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:17,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:17,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:25:17,170 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:17,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1733252916, now seen corresponding path program 1 times [2024-11-02 12:25:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167308889] [2024-11-02 12:25:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:17,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:17,496 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 12:25:17,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:17,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167308889] [2024-11-02 12:25:17,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167308889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:17,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:17,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:25:17,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703325460] [2024-11-02 12:25:17,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:17,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:25:17,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:25:17,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:25:17,499 INFO L87 Difference]: Start difference. First operand 645 states and 847 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:25:18,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:18,320 INFO L93 Difference]: Finished difference Result 1161 states and 1463 transitions. [2024-11-02 12:25:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:25:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-02 12:25:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:18,326 INFO L225 Difference]: With dead ends: 1161 [2024-11-02 12:25:18,326 INFO L226 Difference]: Without dead ends: 859 [2024-11-02 12:25:18,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:25:18,328 INFO L432 NwaCegarLoop]: 119 mSDtfsCounter, 305 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:18,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 605 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:25:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2024-11-02 12:25:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 824. [2024-11-02 12:25:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 587 states have (on average 1.2862010221465077) internal successors, (755), 596 states have internal predecessors, (755), 137 states have call successors, (137), 91 states have call predecessors, (137), 98 states have return successors, (165), 138 states have call predecessors, (165), 135 states have call successors, (165) [2024-11-02 12:25:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1057 transitions. [2024-11-02 12:25:18,482 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1057 transitions. Word has length 46 [2024-11-02 12:25:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:18,482 INFO L471 AbstractCegarLoop]: Abstraction has 824 states and 1057 transitions. [2024-11-02 12:25:18,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:25:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1057 transitions. [2024-11-02 12:25:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:25:18,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:18,489 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:18,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:25:18,490 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:18,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1420471490, now seen corresponding path program 1 times [2024-11-02 12:25:18,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:18,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109024212] [2024-11-02 12:25:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:18,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:18,548 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 12:25:18,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:18,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109024212] [2024-11-02 12:25:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109024212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:18,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:18,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:25:18,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796870546] [2024-11-02 12:25:18,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:18,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:25:18,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:25:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:25:18,551 INFO L87 Difference]: Start difference. First operand 824 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:25:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:18,770 INFO L93 Difference]: Finished difference Result 1388 states and 1727 transitions. [2024-11-02 12:25:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:25:18,771 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-02 12:25:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:18,777 INFO L225 Difference]: With dead ends: 1388 [2024-11-02 12:25:18,777 INFO L226 Difference]: Without dead ends: 956 [2024-11-02 12:25:18,779 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 12:25:18,780 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 67 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:18,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 319 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:25:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2024-11-02 12:25:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 851. [2024-11-02 12:25:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 610 states have (on average 1.278688524590164) internal successors, (780), 619 states have internal predecessors, (780), 139 states have call successors, (139), 93 states have call predecessors, (139), 100 states have return successors, (167), 140 states have call predecessors, (167), 137 states have call successors, (167) [2024-11-02 12:25:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1086 transitions. [2024-11-02 12:25:18,915 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1086 transitions. Word has length 47 [2024-11-02 12:25:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:18,917 INFO L471 AbstractCegarLoop]: Abstraction has 851 states and 1086 transitions. [2024-11-02 12:25:18,920 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:25:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1086 transitions. [2024-11-02 12:25:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 12:25:18,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:18,922 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:18,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:25:18,923 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:18,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash -493605484, now seen corresponding path program 1 times [2024-11-02 12:25:18,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586295655] [2024-11-02 12:25:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:25:18,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:18,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586295655] [2024-11-02 12:25:18,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586295655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:18,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:18,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:25:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177167976] [2024-11-02 12:25:18,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:18,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:25:18,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:25:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:25:18,993 INFO L87 Difference]: Start difference. First operand 851 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:25:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:19,171 INFO L93 Difference]: Finished difference Result 1041 states and 1307 transitions. [2024-11-02 12:25:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:25:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-02 12:25:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:19,177 INFO L225 Difference]: With dead ends: 1041 [2024-11-02 12:25:19,177 INFO L226 Difference]: Without dead ends: 768 [2024-11-02 12:25:19,178 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 12:25:19,179 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 169 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:19,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 238 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:25:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2024-11-02 12:25:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 659. [2024-11-02 12:25:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 470 states have (on average 1.2723404255319148) internal successors, (598), 477 states have internal predecessors, (598), 115 states have call successors, (115), 73 states have call predecessors, (115), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2024-11-02 12:25:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 848 transitions. [2024-11-02 12:25:19,300 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 848 transitions. Word has length 53 [2024-11-02 12:25:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:19,301 INFO L471 AbstractCegarLoop]: Abstraction has 659 states and 848 transitions. [2024-11-02 12:25:19,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:25:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 848 transitions. [2024-11-02 12:25:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 12:25:19,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:19,303 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:19,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:25:19,304 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:19,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2016316846, now seen corresponding path program 1 times [2024-11-02 12:25:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:19,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309326643] [2024-11-02 12:25:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:19,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:25:19,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309326643] [2024-11-02 12:25:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309326643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:19,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:19,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:25:19,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008693017] [2024-11-02 12:25:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:19,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:25:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:25:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:19,458 INFO L87 Difference]: Start difference. First operand 659 states and 848 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-02 12:25:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:19,819 INFO L93 Difference]: Finished difference Result 762 states and 964 transitions. [2024-11-02 12:25:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:25:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-02 12:25:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:19,825 INFO L225 Difference]: With dead ends: 762 [2024-11-02 12:25:19,825 INFO L226 Difference]: Without dead ends: 759 [2024-11-02 12:25:19,826 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 12:25:19,827 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 315 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:19,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 209 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:25:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2024-11-02 12:25:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 658. [2024-11-02 12:25:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 470 states have (on average 1.2659574468085106) internal successors, (595), 476 states have internal predecessors, (595), 114 states have call successors, (114), 73 states have call predecessors, (114), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2024-11-02 12:25:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 844 transitions. [2024-11-02 12:25:19,936 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 844 transitions. Word has length 54 [2024-11-02 12:25:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:19,937 INFO L471 AbstractCegarLoop]: Abstraction has 658 states and 844 transitions. [2024-11-02 12:25:19,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-02 12:25:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 844 transitions. [2024-11-02 12:25:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 12:25:19,939 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:19,940 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:19,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:25:19,940 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:19,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1917984295, now seen corresponding path program 1 times [2024-11-02 12:25:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658594252] [2024-11-02 12:25:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:25:20,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:20,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658594252] [2024-11-02 12:25:20,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658594252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:20,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229416986] [2024-11-02 12:25:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:20,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:20,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:20,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:20,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5465e212-6157-4ab9-80d0-e11489a5264c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:25:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:20,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:25:20,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:25:20,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:25:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:25:20,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229416986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:25:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923399444] [2024-11-02 12:25:20,715 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-02 12:25:20,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:25:20,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:25:20,724 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:25:20,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:25:23,626 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 111 for LOIs [2024-11-02 12:25:23,678 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 107 for LOIs [2024-11-02 12:25:23,728 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 115 for LOIs [2024-11-02 12:25:24,431 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 111 for LOIs [2024-11-02 12:25:24,567 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 111 for LOIs [2024-11-02 12:25:24,691 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 111 for LOIs [2024-11-02 12:25:24,742 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 118 for LOIs [2024-11-02 12:25:24,794 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:25:33,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [923399444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:33,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:25:33,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-02 12:25:33,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231369704] [2024-11-02 12:25:33,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:33,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-02 12:25:33,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-02 12:25:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-02 12:25:33,933 INFO L87 Difference]: Start difference. First operand 658 states and 844 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7)