./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire --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 67b249d19bfb29e53a3ada528cfb44b497320fbfc38e7386ce56807633f41524 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:38:22,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:38:22,142 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:38:22,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:38:22,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:38:22,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:38:22,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:38:22,176 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:38:22,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:38:22,178 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:38:22,178 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:38:22,179 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:38:22,179 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:38:22,180 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:38:22,180 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:38:22,181 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:38:22,181 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:38:22,182 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:38:22,182 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:38:22,183 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:38:22,183 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:38:22,184 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:38:22,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:38:22,185 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:38:22,185 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:38:22,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:38:22,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:38:22,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:38:22,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:38:22,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:38:22,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:38:22,188 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:38:22,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:38:22,188 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:38:22,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:38:22,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:38:22,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:38:22,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:22,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:38:22,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:38:22,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:38:22,190 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:38:22,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:38:22,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:38:22,191 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:38:22,191 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:38:22,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:38:22,191 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_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b249d19bfb29e53a3ada528cfb44b497320fbfc38e7386ce56807633f41524 [2023-11-23 20:38:22,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:38:22,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:38:22,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:38:22,523 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:38:22,523 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:38:22,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2023-11-23 20:38:25,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:38:26,088 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:38:26,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2023-11-23 20:38:26,107 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/data/efef2a530/04a231f5f2824c9c8f5dc1e7cc8ff64e/FLAG7f56efe91 [2023-11-23 20:38:26,121 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/data/efef2a530/04a231f5f2824c9c8f5dc1e7cc8ff64e [2023-11-23 20:38:26,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:38:26,126 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:38:26,127 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:26,127 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:38:26,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:38:26,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b03b0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26, skipping insertion in model container [2023-11-23 20:38:26,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:38:26,378 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_f448c5e2-7ff6-4201-af74-71c7af9d41e7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c[913,926] [2023-11-23 20:38:26,452 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_f448c5e2-7ff6-4201-af74-71c7af9d41e7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c[5977,5990] [2023-11-23 20:38:26,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:26,661 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:38:26,674 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_f448c5e2-7ff6-4201-af74-71c7af9d41e7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c[913,926] [2023-11-23 20:38:26,713 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_f448c5e2-7ff6-4201-af74-71c7af9d41e7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.11.cil-2.c[5977,5990] [2023-11-23 20:38:26,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:26,791 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:38:26,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26 WrapperNode [2023-11-23 20:38:26,792 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:26,793 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:26,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:38:26,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:38:26,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,818 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,896 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1025 [2023-11-23 20:38:26,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:26,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:38:26,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:38:26,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:38:26,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:26,977 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:27,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:27,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:27,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:27,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:38:27,059 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:38:27,059 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:38:27,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:38:27,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (1/1) ... [2023-11-23 20:38:27,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:27,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:27,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:38:27,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:38:27,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:38:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:38:27,184 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:38:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-23 20:38:27,185 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-23 20:38:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 20:38:27,185 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 20:38:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 20:38:27,186 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 20:38:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 20:38:27,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 20:38:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 20:38:27,186 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 20:38:27,187 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 20:38:27,187 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 20:38:27,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:38:27,188 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 20:38:27,188 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 20:38:27,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:38:27,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:38:27,190 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 20:38:27,190 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 20:38:27,357 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:38:27,360 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:38:28,413 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:38:29,126 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:38:29,126 INFO L309 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-23 20:38:29,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:29 BoogieIcfgContainer [2023-11-23 20:38:29,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:38:29,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:38:29,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:38:29,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:38:29,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:26" (1/3) ... [2023-11-23 20:38:29,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c734c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:29, skipping insertion in model container [2023-11-23 20:38:29,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:26" (2/3) ... [2023-11-23 20:38:29,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c734c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:29, skipping insertion in model container [2023-11-23 20:38:29,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:29" (3/3) ... [2023-11-23 20:38:29,142 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.11.cil-2.c [2023-11-23 20:38:29,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:38:29,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:38:29,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:38:29,231 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;@28e18806, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:38:29,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:38:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 202 states have internal predecessors, (301), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-23 20:38:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 20:38:29,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:29,253 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] [2023-11-23 20:38:29,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:29,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash -453989187, now seen corresponding path program 1 times [2023-11-23 20:38:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:29,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317042808] [2023-11-23 20:38:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:29,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:29,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:29,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317042808] [2023-11-23 20:38:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317042808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:29,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:29,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:29,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775219902] [2023-11-23 20:38:29,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:29,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:29,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:29,795 INFO L87 Difference]: Start difference. First operand has 240 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 202 states have internal predecessors, (301), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:38:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:30,059 INFO L93 Difference]: Finished difference Result 513 states and 774 transitions. [2023-11-23 20:38:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:30,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-23 20:38:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:30,077 INFO L225 Difference]: With dead ends: 513 [2023-11-23 20:38:30,077 INFO L226 Difference]: Without dead ends: 273 [2023-11-23 20:38:30,083 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 [2023-11-23 20:38:30,088 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 330 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:30,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 362 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:38:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-23 20:38:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2023-11-23 20:38:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 223 states have (on average 1.4708520179372198) internal successors, (328), 226 states have internal predecessors, (328), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 20:38:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 394 transitions. [2023-11-23 20:38:30,168 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 394 transitions. Word has length 28 [2023-11-23 20:38:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:30,169 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 394 transitions. [2023-11-23 20:38:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:38:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 394 transitions. [2023-11-23 20:38:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 20:38:30,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:30,173 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] [2023-11-23 20:38:30,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:38:30,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:30,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash -101378415, now seen corresponding path program 1 times [2023-11-23 20:38:30,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:30,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127947009] [2023-11-23 20:38:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:30,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:30,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127947009] [2023-11-23 20:38:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127947009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:30,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:30,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098188254] [2023-11-23 20:38:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:30,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:30,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:30,257 INFO L87 Difference]: Start difference. First operand 269 states and 394 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:38:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:30,431 INFO L93 Difference]: Finished difference Result 425 states and 611 transitions. [2023-11-23 20:38:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-23 20:38:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:30,438 INFO L225 Difference]: With dead ends: 425 [2023-11-23 20:38:30,438 INFO L226 Difference]: Without dead ends: 344 [2023-11-23 20:38:30,439 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 [2023-11-23 20:38:30,441 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 328 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:30,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 346 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:38:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-23 20:38:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 340. [2023-11-23 20:38:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 283 states have (on average 1.4452296819787986) internal successors, (409), 286 states have internal predecessors, (409), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-23 20:38:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 489 transitions. [2023-11-23 20:38:30,480 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 489 transitions. Word has length 29 [2023-11-23 20:38:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:30,481 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 489 transitions. [2023-11-23 20:38:30,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:38:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 489 transitions. [2023-11-23 20:38:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 20:38:30,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:30,484 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] [2023-11-23 20:38:30,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:38:30,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:30,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2071914547, now seen corresponding path program 1 times [2023-11-23 20:38:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:30,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780320568] [2023-11-23 20:38:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:30,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:30,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:30,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780320568] [2023-11-23 20:38:30,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780320568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:30,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830324644] [2023-11-23 20:38:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:30,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:30,595 INFO L87 Difference]: Start difference. First operand 340 states and 489 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:38:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:30,775 INFO L93 Difference]: Finished difference Result 580 states and 817 transitions. [2023-11-23 20:38:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-23 20:38:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:30,779 INFO L225 Difference]: With dead ends: 580 [2023-11-23 20:38:30,780 INFO L226 Difference]: Without dead ends: 428 [2023-11-23 20:38:30,785 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 [2023-11-23 20:38:30,789 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 46 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:30,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 583 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:38:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-11-23 20:38:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 414. [2023-11-23 20:38:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 346 states have (on average 1.4277456647398843) internal successors, (494), 351 states have internal predecessors, (494), 47 states have call successors, (47), 20 states have call predecessors, (47), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-23 20:38:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 586 transitions. [2023-11-23 20:38:30,848 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 586 transitions. Word has length 30 [2023-11-23 20:38:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:30,849 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 586 transitions. [2023-11-23 20:38:30,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:38:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 586 transitions. [2023-11-23 20:38:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:38:30,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:30,861 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] [2023-11-23 20:38:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:38:30,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:30,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2008765306, now seen corresponding path program 1 times [2023-11-23 20:38:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:30,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617472799] [2023-11-23 20:38:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:38:31,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:31,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617472799] [2023-11-23 20:38:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617472799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:31,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:31,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:31,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625063056] [2023-11-23 20:38:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:31,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:31,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:31,030 INFO L87 Difference]: Start difference. First operand 414 states and 586 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:38:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:31,182 INFO L93 Difference]: Finished difference Result 577 states and 804 transitions. [2023-11-23 20:38:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-11-23 20:38:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:31,188 INFO L225 Difference]: With dead ends: 577 [2023-11-23 20:38:31,188 INFO L226 Difference]: Without dead ends: 419 [2023-11-23 20:38:31,191 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 [2023-11-23 20:38:31,199 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 32 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:31,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 617 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:38:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-23 20:38:31,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 408. [2023-11-23 20:38:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 340 states have (on average 1.411764705882353) internal successors, (480), 345 states have internal predecessors, (480), 47 states have call successors, (47), 20 states have call predecessors, (47), 19 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-23 20:38:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 572 transitions. [2023-11-23 20:38:31,239 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 572 transitions. Word has length 43 [2023-11-23 20:38:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:31,241 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 572 transitions. [2023-11-23 20:38:31,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:38:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 572 transitions. [2023-11-23 20:38:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 20:38:31,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:31,244 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] [2023-11-23 20:38:31,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:38:31,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:31,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1607680, now seen corresponding path program 1 times [2023-11-23 20:38:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145761029] [2023-11-23 20:38:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:38:31,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:31,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145761029] [2023-11-23 20:38:31,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145761029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:31,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:31,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:31,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578689011] [2023-11-23 20:38:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:31,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:31,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:31,327 INFO L87 Difference]: Start difference. First operand 408 states and 572 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:38:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:31,455 INFO L93 Difference]: Finished difference Result 657 states and 896 transitions. [2023-11-23 20:38:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-11-23 20:38:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:31,459 INFO L225 Difference]: With dead ends: 657 [2023-11-23 20:38:31,460 INFO L226 Difference]: Without dead ends: 454 [2023-11-23 20:38:31,461 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 [2023-11-23 20:38:31,462 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 314 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:31,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 345 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:38:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-11-23 20:38:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2023-11-23 20:38:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 379 states have (on average 1.3799472295514512) internal successors, (523), 384 states have internal predecessors, (523), 51 states have call successors, (51), 23 states have call predecessors, (51), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-23 20:38:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 623 transitions. [2023-11-23 20:38:31,499 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 623 transitions. Word has length 46 [2023-11-23 20:38:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:31,499 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 623 transitions. [2023-11-23 20:38:31,499 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:38:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 623 transitions. [2023-11-23 20:38:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 20:38:31,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:31,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:31,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:38:31,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:31,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1252562450, now seen corresponding path program 1 times [2023-11-23 20:38:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107331541] [2023-11-23 20:38:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:31,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:38:31,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:31,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107331541] [2023-11-23 20:38:31,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107331541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:31,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:38:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148608910] [2023-11-23 20:38:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:31,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:38:31,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:38:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:38:31,713 INFO L87 Difference]: Start difference. First operand 454 states and 623 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:38:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:32,047 INFO L93 Difference]: Finished difference Result 494 states and 670 transitions. [2023-11-23 20:38:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:38:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-11-23 20:38:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:32,054 INFO L225 Difference]: With dead ends: 494 [2023-11-23 20:38:32,055 INFO L226 Difference]: Without dead ends: 491 [2023-11-23 20:38:32,055 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 [2023-11-23 20:38:32,057 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 576 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:32,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 344 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:38:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-11-23 20:38:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 453. [2023-11-23 20:38:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 379 states have (on average 1.3746701846965699) internal successors, (521), 383 states have internal predecessors, (521), 50 states have call successors, (50), 23 states have call predecessors, (50), 22 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-23 20:38:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 620 transitions. [2023-11-23 20:38:32,123 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 620 transitions. Word has length 47 [2023-11-23 20:38:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:32,124 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 620 transitions. [2023-11-23 20:38:32,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:38:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 620 transitions. [2023-11-23 20:38:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 20:38:32,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:32,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:32,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:38:32,128 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:32,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:32,128 INFO L85 PathProgramCache]: Analyzing trace with hash 173398979, now seen corresponding path program 1 times [2023-11-23 20:38:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721031974] [2023-11-23 20:38:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:38:32,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:32,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721031974] [2023-11-23 20:38:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721031974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:32,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076635726] [2023-11-23 20:38:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:32,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:32,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:32,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f448c5e2-7ff6-4201-af74-71c7af9d41e7/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:38:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:32,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:38:32,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:38:32,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:38:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:38:33,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076635726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:38:33,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584776865] [2023-11-23 20:38:33,028 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-23 20:38:33,028 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:38:33,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:38:33,040 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:38:33,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:38:43,795 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 179 for LOIs [2023-11-23 20:38:43,866 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 196 for LOIs [2023-11-23 20:38:43,957 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 242 for LOIs [2023-11-23 20:38:49,588 INFO L180 IcfgInterpreter]: Interpretation finished