./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ --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 f24e14c02d3357f8669328b41c4b37af446f7269afa24af78cb772dc24fa0c01 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:14:05,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:14:05,972 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:14:05,977 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:14:05,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:14:06,022 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:14:06,023 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:14:06,024 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:14:06,025 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:14:06,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:14:06,026 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:14:06,027 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:14:06,028 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:14:06,028 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:14:06,029 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:14:06,029 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:14:06,030 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:14:06,031 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:14:06,031 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:14:06,032 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:14:06,032 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:14:06,034 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:14:06,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:14:06,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:14:06,036 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:14:06,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:14:06,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:14:06,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:14:06,038 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:14:06,038 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:14:06,038 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:14:06,039 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:14:06,039 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:14:06,040 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:14:06,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:14:06,041 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:14:06,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:06,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:14:06,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:14:06,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:14:06,044 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:14:06,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:14:06,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:14:06,045 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:14:06,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:14:06,046 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_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24e14c02d3357f8669328b41c4b37af446f7269afa24af78cb772dc24fa0c01 [2023-11-19 05:14:06,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:14:06,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:14:06,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:14:06,395 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:14:06,395 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:14:06,397 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2023-11-19 05:14:09,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:14:09,761 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:14:09,761 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2023-11-19 05:14:09,775 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/data/aa5e84833/704ca5c58fac4c9ca79e4874cc6a6e9f/FLAGa0889c9b3 [2023-11-19 05:14:09,791 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/data/aa5e84833/704ca5c58fac4c9ca79e4874cc6a6e9f [2023-11-19 05:14:09,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:14:09,795 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:14:09,796 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:09,797 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:14:09,802 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:14:09,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:09" (1/1) ... [2023-11-19 05:14:09,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f584f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:09, skipping insertion in model container [2023-11-19 05:14:09,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:09" (1/1) ... [2023-11-19 05:14:09,852 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:14:10,001 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[914,927] [2023-11-19 05:14:10,055 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[7115,7128] [2023-11-19 05:14:10,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:10,107 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:14:10,130 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[914,927] [2023-11-19 05:14:10,171 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.01.cil-1.c[7115,7128] [2023-11-19 05:14:10,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:10,227 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:14:10,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10 WrapperNode [2023-11-19 05:14:10,228 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:10,229 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:10,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:14:10,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:14:10,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,260 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,311 INFO L138 Inliner]: procedures = 55, calls = 60, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 410 [2023-11-19 05:14:10,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:10,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:14:10,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:14:10,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:14:10,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:14:10,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:14:10,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:14:10,382 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:14:10,382 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (1/1) ... [2023-11-19 05:14:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:10,417 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:14:10,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:14:10,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:14:10,460 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:14:10,460 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:14:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 05:14:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 05:14:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 05:14:10,463 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 05:14:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 05:14:10,463 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 05:14:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 05:14:10,464 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 05:14:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 05:14:10,464 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 05:14:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 05:14:10,464 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 05:14:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 05:14:10,465 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 05:14:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 05:14:10,466 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 05:14:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 05:14:10,466 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 05:14:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 05:14:10,468 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 05:14:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:14:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 05:14:10,468 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 05:14:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 05:14:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 05:14:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:14:10,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:14:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 05:14:10,470 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 05:14:10,571 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:14:10,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:14:11,135 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:14:11,291 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:14:11,291 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-19 05:14:11,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:11 BoogieIcfgContainer [2023-11-19 05:14:11,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:14:11,308 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:14:11,308 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:14:11,311 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:14:11,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:14:09" (1/3) ... [2023-11-19 05:14:11,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffdd884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:11, skipping insertion in model container [2023-11-19 05:14:11,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:10" (2/3) ... [2023-11-19 05:14:11,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffdd884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:11, skipping insertion in model container [2023-11-19 05:14:11,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:11" (3/3) ... [2023-11-19 05:14:11,316 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.01.cil-1.c [2023-11-19 05:14:11,333 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:14:11,333 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:14:11,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:14:11,395 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f411f5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:14:11,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:14:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 95 states have (on average 1.4631578947368422) internal successors, (139), 101 states have internal predecessors, (139), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-19 05:14:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 05:14:11,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:11,410 INFO L195 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] [2023-11-19 05:14:11,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:11,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -999130447, now seen corresponding path program 1 times [2023-11-19 05:14:11,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:11,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968251986] [2023-11-19 05:14:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:11,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:11,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968251986] [2023-11-19 05:14:11,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968251986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:11,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:11,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:14:11,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175671577] [2023-11-19 05:14:11,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:11,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:11,962 INFO L87 Difference]: Start difference. First operand has 141 states, 95 states have (on average 1.4631578947368422) internal successors, (139), 101 states have internal predecessors, (139), 29 states have call successors, (29), 14 states have call predecessors, (29), 14 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2023-11-19 05:14:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:12,815 INFO L93 Difference]: Finished difference Result 503 states and 720 transitions. [2023-11-19 05:14:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:14:12,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 34 [2023-11-19 05:14:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:12,833 INFO L225 Difference]: With dead ends: 503 [2023-11-19 05:14:12,833 INFO L226 Difference]: Without dead ends: 357 [2023-11-19 05:14:12,838 INFO L412 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 [2023-11-19 05:14:12,841 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 442 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:12,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 448 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:14:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-19 05:14:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 346. [2023-11-19 05:14:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 237 states have (on average 1.3122362869198312) internal successors, (311), 244 states have internal predecessors, (311), 70 states have call successors, (70), 38 states have call predecessors, (70), 37 states have return successors, (86), 65 states have call predecessors, (86), 68 states have call successors, (86) [2023-11-19 05:14:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 467 transitions. [2023-11-19 05:14:12,935 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 467 transitions. Word has length 34 [2023-11-19 05:14:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:12,936 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 467 transitions. [2023-11-19 05:14:12,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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) [2023-11-19 05:14:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 467 transitions. [2023-11-19 05:14:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:14:12,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:12,941 INFO L195 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] [2023-11-19 05:14:12,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:14:12,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:12,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:12,942 INFO L85 PathProgramCache]: Analyzing trace with hash -594402967, now seen corresponding path program 1 times [2023-11-19 05:14:12,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:12,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931264429] [2023-11-19 05:14:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:12,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:13,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:13,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931264429] [2023-11-19 05:14:13,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931264429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:13,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:13,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:13,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342124150] [2023-11-19 05:14:13,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:13,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:14:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:14:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:14:13,084 INFO L87 Difference]: Start difference. First operand 346 states and 467 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) [2023-11-19 05:14:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:13,358 INFO L93 Difference]: Finished difference Result 470 states and 629 transitions. [2023-11-19 05:14:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:14:13,359 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 [2023-11-19 05:14:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:13,367 INFO L225 Difference]: With dead ends: 470 [2023-11-19 05:14:13,368 INFO L226 Difference]: Without dead ends: 406 [2023-11-19 05:14:13,370 INFO L412 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 [2023-11-19 05:14:13,372 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 237 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:13,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 338 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:14:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-19 05:14:13,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2023-11-19 05:14:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 275 states have (on average 1.3018181818181818) internal successors, (358), 282 states have internal predecessors, (358), 78 states have call successors, (78), 45 states have call predecessors, (78), 44 states have return successors, (94), 73 states have call predecessors, (94), 76 states have call successors, (94) [2023-11-19 05:14:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 530 transitions. [2023-11-19 05:14:13,501 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 530 transitions. Word has length 45 [2023-11-19 05:14:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:13,502 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 530 transitions. [2023-11-19 05:14:13,502 INFO L496 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) [2023-11-19 05:14:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 530 transitions. [2023-11-19 05:14:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:14:13,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:13,506 INFO L195 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] [2023-11-19 05:14:13,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:14:13,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:13,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:13,507 INFO L85 PathProgramCache]: Analyzing trace with hash 324571656, now seen corresponding path program 1 times [2023-11-19 05:14:13,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:13,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934721479] [2023-11-19 05:14:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:13,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:13,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:13,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934721479] [2023-11-19 05:14:13,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934721479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:13,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:13,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:14:13,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753488065] [2023-11-19 05:14:13,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:13,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:14:13,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:13,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:14:13,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:14:13,700 INFO L87 Difference]: Start difference. First operand 399 states and 530 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) [2023-11-19 05:14:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:14,308 INFO L93 Difference]: Finished difference Result 801 states and 1033 transitions. [2023-11-19 05:14:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:14:14,309 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 [2023-11-19 05:14:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:14,314 INFO L225 Difference]: With dead ends: 801 [2023-11-19 05:14:14,315 INFO L226 Difference]: Without dead ends: 669 [2023-11-19 05:14:14,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:14:14,317 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 560 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:14,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 652 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:14:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-11-19 05:14:14,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 585. [2023-11-19 05:14:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 407 states have (on average 1.2727272727272727) internal successors, (518), 415 states have internal predecessors, (518), 105 states have call successors, (105), 68 states have call predecessors, (105), 71 states have return successors, (125), 103 states have call predecessors, (125), 103 states have call successors, (125) [2023-11-19 05:14:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 748 transitions. [2023-11-19 05:14:14,395 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 748 transitions. Word has length 45 [2023-11-19 05:14:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:14,395 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 748 transitions. [2023-11-19 05:14:14,395 INFO L496 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) [2023-11-19 05:14:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 748 transitions. [2023-11-19 05:14:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:14:14,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:14,398 INFO L195 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] [2023-11-19 05:14:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:14:14,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:14,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash 277528404, now seen corresponding path program 1 times [2023-11-19 05:14:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167132822] [2023-11-19 05:14:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:14,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:14,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167132822] [2023-11-19 05:14:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167132822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:14,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:14,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:14:14,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363501753] [2023-11-19 05:14:14,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:14,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:14:14,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:14:14,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:14:14,603 INFO L87 Difference]: Start difference. First operand 585 states and 748 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) [2023-11-19 05:14:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:15,236 INFO L93 Difference]: Finished difference Result 1101 states and 1364 transitions. [2023-11-19 05:14:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:14:15,236 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 [2023-11-19 05:14:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:15,242 INFO L225 Difference]: With dead ends: 1101 [2023-11-19 05:14:15,242 INFO L226 Difference]: Without dead ends: 799 [2023-11-19 05:14:15,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:14:15,245 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 283 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:15,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 547 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:14:15,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-19 05:14:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 764. [2023-11-19 05:14:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 532 states have (on average 1.2593984962406015) internal successors, (670), 541 states have internal predecessors, (670), 132 states have call successors, (132), 91 states have call predecessors, (132), 98 states have return successors, (156), 133 states have call predecessors, (156), 130 states have call successors, (156) [2023-11-19 05:14:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 958 transitions. [2023-11-19 05:14:15,375 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 958 transitions. Word has length 46 [2023-11-19 05:14:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:15,377 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 958 transitions. [2023-11-19 05:14:15,377 INFO L496 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) [2023-11-19 05:14:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 958 transitions. [2023-11-19 05:14:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:14:15,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:15,380 INFO L195 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] [2023-11-19 05:14:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:14:15,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:15,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash 696783229, now seen corresponding path program 1 times [2023-11-19 05:14:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:15,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716708112] [2023-11-19 05:14:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:15,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:15,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:15,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716708112] [2023-11-19 05:14:15,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716708112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:15,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:15,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:15,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527370274] [2023-11-19 05:14:15,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:15,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:15,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:15,464 INFO L87 Difference]: Start difference. First operand 764 states and 958 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) [2023-11-19 05:14:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:15,639 INFO L93 Difference]: Finished difference Result 1328 states and 1628 transitions. [2023-11-19 05:14:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:15,640 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 [2023-11-19 05:14:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:15,646 INFO L225 Difference]: With dead ends: 1328 [2023-11-19 05:14:15,646 INFO L226 Difference]: Without dead ends: 896 [2023-11-19 05:14:15,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:15,650 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 67 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:15,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 287 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2023-11-19 05:14:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 791. [2023-11-19 05:14:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 555 states have (on average 1.2522522522522523) internal successors, (695), 564 states have internal predecessors, (695), 134 states have call successors, (134), 93 states have call predecessors, (134), 100 states have return successors, (158), 135 states have call predecessors, (158), 132 states have call successors, (158) [2023-11-19 05:14:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 987 transitions. [2023-11-19 05:14:15,771 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 987 transitions. Word has length 47 [2023-11-19 05:14:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:15,772 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 987 transitions. [2023-11-19 05:14:15,773 INFO L496 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) [2023-11-19 05:14:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 987 transitions. [2023-11-19 05:14:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-19 05:14:15,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:15,779 INFO L195 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] [2023-11-19 05:14:15,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:14:15,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1471340523, now seen corresponding path program 1 times [2023-11-19 05:14:15,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:15,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589656528] [2023-11-19 05:14:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:15,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:14:15,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:15,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589656528] [2023-11-19 05:14:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589656528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:15,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:15,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:15,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403528729] [2023-11-19 05:14:15,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:15,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:15,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:15,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:15,870 INFO L87 Difference]: Start difference. First operand 791 states and 987 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) [2023-11-19 05:14:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:16,051 INFO L93 Difference]: Finished difference Result 981 states and 1208 transitions. [2023-11-19 05:14:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:16,053 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 [2023-11-19 05:14:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:16,058 INFO L225 Difference]: With dead ends: 981 [2023-11-19 05:14:16,058 INFO L226 Difference]: Without dead ends: 708 [2023-11-19 05:14:16,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:16,062 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 150 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:16,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 222 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-19 05:14:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 599. [2023-11-19 05:14:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 415 states have (on average 1.236144578313253) internal successors, (513), 422 states have internal predecessors, (513), 110 states have call successors, (110), 73 states have call predecessors, (110), 72 states have return successors, (126), 105 states have call predecessors, (126), 108 states have call successors, (126) [2023-11-19 05:14:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 749 transitions. [2023-11-19 05:14:16,153 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 749 transitions. Word has length 53 [2023-11-19 05:14:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:16,153 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 749 transitions. [2023-11-19 05:14:16,153 INFO L496 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) [2023-11-19 05:14:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 749 transitions. [2023-11-19 05:14:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 05:14:16,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:16,155 INFO L195 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] [2023-11-19 05:14:16,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:14:16,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:16,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash 828840434, now seen corresponding path program 1 times [2023-11-19 05:14:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163290738] [2023-11-19 05:14:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:16,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:16,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:16,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163290738] [2023-11-19 05:14:16,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163290738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:16,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:16,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:16,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531430542] [2023-11-19 05:14:16,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:16,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:14:16,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:14:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:14:16,252 INFO L87 Difference]: Start difference. First operand 599 states and 749 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) [2023-11-19 05:14:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:16,586 INFO L93 Difference]: Finished difference Result 702 states and 865 transitions. [2023-11-19 05:14:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:14:16,587 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 [2023-11-19 05:14:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:16,593 INFO L225 Difference]: With dead ends: 702 [2023-11-19 05:14:16,594 INFO L226 Difference]: Without dead ends: 699 [2023-11-19 05:14:16,594 INFO L412 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 [2023-11-19 05:14:16,597 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 281 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:16,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 193 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:14:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-11-19 05:14:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 598. [2023-11-19 05:14:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 415 states have (on average 1.2289156626506024) internal successors, (510), 421 states have internal predecessors, (510), 109 states have call successors, (109), 73 states have call predecessors, (109), 72 states have return successors, (126), 105 states have call predecessors, (126), 108 states have call successors, (126) [2023-11-19 05:14:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 745 transitions. [2023-11-19 05:14:16,721 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 745 transitions. Word has length 54 [2023-11-19 05:14:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:16,722 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 745 transitions. [2023-11-19 05:14:16,723 INFO L496 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) [2023-11-19 05:14:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 745 transitions. [2023-11-19 05:14:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 05:14:16,726 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:16,726 INFO L195 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] [2023-11-19 05:14:16,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:14:16,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:16,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -76378906, now seen corresponding path program 1 times [2023-11-19 05:14:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:16,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788469120] [2023-11-19 05:14:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:16,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:16,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788469120] [2023-11-19 05:14:16,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788469120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:16,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61936545] [2023-11-19 05:14:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:16,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:16,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:16,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:16,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:14:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:17,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:14:17,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:17,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:17,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61936545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:17,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648339815] [2023-11-19 05:14:17,501 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-19 05:14:17,501 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:17,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:17,510 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:17,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:14:20,396 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 101 for LOIs [2023-11-19 05:14:20,458 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 97 for LOIs [2023-11-19 05:14:20,508 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 105 for LOIs [2023-11-19 05:14:21,125 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 101 for LOIs [2023-11-19 05:14:21,264 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 101 for LOIs [2023-11-19 05:14:21,377 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 101 for LOIs [2023-11-19 05:14:21,425 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 108 for LOIs [2023-11-19 05:14:21,488 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:14:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1648339815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:30,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:30,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-19 05:14:30,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242946680] [2023-11-19 05:14:30,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:30,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-19 05:14:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-19 05:14:30,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 05:14:30,481 INFO L87 Difference]: Start difference. First operand 598 states and 745 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 05:14:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:43,712 INFO L93 Difference]: Finished difference Result 962 states and 1156 transitions. [2023-11-19 05:14:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-19 05:14:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-11-19 05:14:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:43,717 INFO L225 Difference]: With dead ends: 962 [2023-11-19 05:14:43,717 INFO L226 Difference]: Without dead ends: 647 [2023-11-19 05:14:43,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 05:14:43,721 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 133 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:43,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1412 Invalid, 2725 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [128 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-19 05:14:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-11-19 05:14:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 632. [2023-11-19 05:14:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 441 states have (on average 1.219954648526077) internal successors, (538), 447 states have internal predecessors, (538), 111 states have call successors, (111), 79 states have call predecessors, (111), 78 states have return successors, (128), 107 states have call predecessors, (128), 110 states have call successors, (128) [2023-11-19 05:14:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 777 transitions. [2023-11-19 05:14:43,807 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 777 transitions. Word has length 55 [2023-11-19 05:14:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:43,808 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 777 transitions. [2023-11-19 05:14:43,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 05:14:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 777 transitions. [2023-11-19 05:14:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 05:14:43,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:43,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:43,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:44,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:44,024 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:44,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:44,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1842557392, now seen corresponding path program 1 times [2023-11-19 05:14:44,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:44,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213781881] [2023-11-19 05:14:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:44,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:14:44,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213781881] [2023-11-19 05:14:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213781881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:44,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:44,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:14:44,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314566586] [2023-11-19 05:14:44,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:44,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:14:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:14:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:14:44,304 INFO L87 Difference]: Start difference. First operand 632 states and 777 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:14:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:44,768 INFO L93 Difference]: Finished difference Result 1064 states and 1369 transitions. [2023-11-19 05:14:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:14:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2023-11-19 05:14:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:44,774 INFO L225 Difference]: With dead ends: 1064 [2023-11-19 05:14:44,774 INFO L226 Difference]: Without dead ends: 793 [2023-11-19 05:14:44,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:14:44,776 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 250 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:44,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 411 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:14:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-11-19 05:14:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2023-11-19 05:14:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 542 states have (on average 1.2195571955719557) internal successors, (661), 550 states have internal predecessors, (661), 141 states have call successors, (141), 97 states have call predecessors, (141), 96 states have return successors, (170), 135 states have call predecessors, (170), 140 states have call successors, (170) [2023-11-19 05:14:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 972 transitions. [2023-11-19 05:14:44,891 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 972 transitions. Word has length 60 [2023-11-19 05:14:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:44,891 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 972 transitions. [2023-11-19 05:14:44,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:14:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 972 transitions. [2023-11-19 05:14:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 05:14:44,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:44,894 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:44,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:14:44,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:44,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:44,895 INFO L85 PathProgramCache]: Analyzing trace with hash -235427252, now seen corresponding path program 1 times [2023-11-19 05:14:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:44,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696235781] [2023-11-19 05:14:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:14:44,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:44,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696235781] [2023-11-19 05:14:44,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696235781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:44,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:44,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548041112] [2023-11-19 05:14:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:44,953 INFO L87 Difference]: Start difference. First operand 781 states and 972 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:14:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:45,124 INFO L93 Difference]: Finished difference Result 1062 states and 1294 transitions. [2023-11-19 05:14:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-11-19 05:14:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:45,130 INFO L225 Difference]: With dead ends: 1062 [2023-11-19 05:14:45,130 INFO L226 Difference]: Without dead ends: 893 [2023-11-19 05:14:45,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:45,132 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 42 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:45,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 333 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-11-19 05:14:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 816. [2023-11-19 05:14:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 571 states have (on average 1.2206654991243433) internal successors, (697), 579 states have internal predecessors, (697), 144 states have call successors, (144), 100 states have call predecessors, (144), 99 states have return successors, (173), 138 states have call predecessors, (173), 143 states have call successors, (173) [2023-11-19 05:14:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1014 transitions. [2023-11-19 05:14:45,254 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1014 transitions. Word has length 61 [2023-11-19 05:14:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:45,255 INFO L495 AbstractCegarLoop]: Abstraction has 816 states and 1014 transitions. [2023-11-19 05:14:45,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:14:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1014 transitions. [2023-11-19 05:14:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-19 05:14:45,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:45,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:45,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:14:45,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:45,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2051135371, now seen corresponding path program 1 times [2023-11-19 05:14:45,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:45,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933171506] [2023-11-19 05:14:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:45,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:14:45,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933171506] [2023-11-19 05:14:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933171506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:45,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:45,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688019783] [2023-11-19 05:14:45,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:45,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:45,337 INFO L87 Difference]: Start difference. First operand 816 states and 1014 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:14:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:45,520 INFO L93 Difference]: Finished difference Result 1276 states and 1639 transitions. [2023-11-19 05:14:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:14:45,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2023-11-19 05:14:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:45,527 INFO L225 Difference]: With dead ends: 1276 [2023-11-19 05:14:45,527 INFO L226 Difference]: Without dead ends: 909 [2023-11-19 05:14:45,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:45,529 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 28 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:45,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 325 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:14:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2023-11-19 05:14:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 853. [2023-11-19 05:14:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 602 states have (on average 1.2259136212624584) internal successors, (738), 610 states have internal predecessors, (738), 147 states have call successors, (147), 103 states have call predecessors, (147), 102 states have return successors, (176), 141 states have call predecessors, (176), 146 states have call successors, (176) [2023-11-19 05:14:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1061 transitions. [2023-11-19 05:14:45,647 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1061 transitions. Word has length 62 [2023-11-19 05:14:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:45,648 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1061 transitions. [2023-11-19 05:14:45,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:14:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1061 transitions. [2023-11-19 05:14:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 05:14:45,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:45,650 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:45,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:14:45,650 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:45,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:45,652 INFO L85 PathProgramCache]: Analyzing trace with hash -954253072, now seen corresponding path program 1 times [2023-11-19 05:14:45,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:45,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790614107] [2023-11-19 05:14:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:45,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:14:45,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790614107] [2023-11-19 05:14:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790614107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:45,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:14:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668972582] [2023-11-19 05:14:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:14:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:14:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:14:45,801 INFO L87 Difference]: Start difference. First operand 853 states and 1061 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:14:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:46,388 INFO L93 Difference]: Finished difference Result 1316 states and 1587 transitions. [2023-11-19 05:14:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:14:46,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-11-19 05:14:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:46,395 INFO L225 Difference]: With dead ends: 1316 [2023-11-19 05:14:46,395 INFO L226 Difference]: Without dead ends: 1013 [2023-11-19 05:14:46,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:14:46,397 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 267 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:46,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 436 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:14:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-11-19 05:14:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 992. [2023-11-19 05:14:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 696 states have (on average 1.2083333333333333) internal successors, (841), 704 states have internal predecessors, (841), 171 states have call successors, (171), 124 states have call predecessors, (171), 123 states have return successors, (200), 165 states have call predecessors, (200), 170 states have call successors, (200) [2023-11-19 05:14:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1212 transitions. [2023-11-19 05:14:46,547 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1212 transitions. Word has length 63 [2023-11-19 05:14:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:46,547 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1212 transitions. [2023-11-19 05:14:46,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:14:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1212 transitions. [2023-11-19 05:14:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 05:14:46,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:46,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:46,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:14:46,549 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:46,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash -407036412, now seen corresponding path program 1 times [2023-11-19 05:14:46,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:46,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244725852] [2023-11-19 05:14:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:46,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:14:46,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244725852] [2023-11-19 05:14:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244725852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955281489] [2023-11-19 05:14:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:46,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:46,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:46,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:14:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:46,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:14:46,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:14:46,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:14:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955281489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788573750] [2023-11-19 05:14:47,001 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-19 05:14:47,001 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:47,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:47,002 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:47,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:14:49,890 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 101 for LOIs [2023-11-19 05:14:49,958 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 59 for LOIs [2023-11-19 05:14:49,991 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-11-19 05:14:49,998 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 105 for LOIs [2023-11-19 05:14:50,483 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 101 for LOIs [2023-11-19 05:14:50,565 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 101 for LOIs [2023-11-19 05:14:50,634 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 101 for LOIs [2023-11-19 05:14:50,669 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 108 for LOIs [2023-11-19 05:14:50,708 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:14:56,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27732#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((v_~q_free~0_44 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| Int)) (and (<= v_~q_free~0_44 1) (not (= ~p_dw_st~0 0)) (<= 0 ~p_dw_pc~0) (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 1) (not (= v_~q_free~0_44 1)))) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_3| 0)))) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-11-19 05:14:56,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:14:56,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:56,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-19 05:14:56,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193469604] [2023-11-19 05:14:56,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:56,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:14:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:14:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 05:14:56,990 INFO L87 Difference]: Start difference. First operand 992 states and 1212 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-19 05:14:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:57,605 INFO L93 Difference]: Finished difference Result 2086 states and 2453 transitions. [2023-11-19 05:14:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:14:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2023-11-19 05:14:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:57,617 INFO L225 Difference]: With dead ends: 2086 [2023-11-19 05:14:57,617 INFO L226 Difference]: Without dead ends: 2083 [2023-11-19 05:14:57,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 05:14:57,620 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 412 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:57,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 609 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:14:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2023-11-19 05:14:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1506. [2023-11-19 05:14:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1052 states have (on average 1.1977186311787071) internal successors, (1260), 1060 states have internal predecessors, (1260), 255 states have call successors, (255), 198 states have call predecessors, (255), 197 states have return successors, (284), 249 states have call predecessors, (284), 254 states have call successors, (284) [2023-11-19 05:14:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 1799 transitions. [2023-11-19 05:14:57,919 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 1799 transitions. Word has length 64 [2023-11-19 05:14:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:57,919 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 1799 transitions. [2023-11-19 05:14:57,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-19 05:14:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 1799 transitions. [2023-11-19 05:14:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 05:14:57,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:57,922 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:57,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:58,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3ae646-07ce-4fbf-b524-326f98562981/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 05:14:58,143 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:58,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1964665096, now seen corresponding path program 2 times [2023-11-19 05:14:58,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:58,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250641703] [2023-11-19 05:14:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:58,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:14:58,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250641703] [2023-11-19 05:14:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250641703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:58,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:58,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:14:58,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108250538] [2023-11-19 05:14:58,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:58,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:14:58,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:14:58,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:14:58,180 INFO L87 Difference]: Start difference. First operand 1506 states and 1799 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)