./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5 --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 a31ccbb50ed824a1b6eea67c3747e38f48ab93613ea1abf86baf8d129dc78945 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:50:26,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:50:26,075 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:50:26,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:50:26,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:50:26,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:50:26,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:50:26,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:50:26,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:50:26,110 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:50:26,111 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:50:26,112 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:50:26,112 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:50:26,113 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:50:26,114 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:50:26,114 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:50:26,115 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:50:26,115 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:50:26,116 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:50:26,117 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:50:26,117 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:50:26,118 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:50:26,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:50:26,119 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:50:26,120 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:50:26,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:50:26,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:50:26,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:50:26,122 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:50:26,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:50:26,123 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:50:26,123 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:50:26,123 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:50:26,124 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:50:26,124 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:50:26,124 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:50:26,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:50:26,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:50:26,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:50:26,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:50:26,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:50:26,127 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:50:26,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:50:26,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:50:26,128 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:50:26,128 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:50:26,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:50:26,128 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_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a31ccbb50ed824a1b6eea67c3747e38f48ab93613ea1abf86baf8d129dc78945 [2023-11-21 19:50:26,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:50:26,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:50:26,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:50:26,506 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:50:26,507 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:50:26,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2023-11-21 19:50:29,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:50:30,035 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:50:30,038 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2023-11-21 19:50:30,066 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/data/b02d3dbe2/f3726c857b9d4c88a9e3217f00f5227c/FLAG0a80a5afc [2023-11-21 19:50:30,087 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/data/b02d3dbe2/f3726c857b9d4c88a9e3217f00f5227c [2023-11-21 19:50:30,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:50:30,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:50:30,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:50:30,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:50:30,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:50:30,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448e1ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30, skipping insertion in model container [2023-11-21 19:50:30,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,203 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:50:30,410 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_0530803b-29c3-4311-a683-69f4530dbae4/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[914,927] [2023-11-21 19:50:30,472 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_0530803b-29c3-4311-a683-69f4530dbae4/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[7115,7128] [2023-11-21 19:50:30,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:50:30,561 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:50:30,590 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_0530803b-29c3-4311-a683-69f4530dbae4/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[914,927] [2023-11-21 19:50:30,618 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_0530803b-29c3-4311-a683-69f4530dbae4/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-1.c[7115,7128] [2023-11-21 19:50:30,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:50:30,673 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:50:30,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30 WrapperNode [2023-11-21 19:50:30,674 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:50:30,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:50:30,675 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:50:30,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:50:30,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,746 INFO L138 Inliner]: procedures = 59, calls = 67, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 536 [2023-11-21 19:50:30,747 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:50:30,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:50:30,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:50:30,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:50:30,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,764 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,787 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,794 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:50:30,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:50:30,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:50:30,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:50:30,802 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (1/1) ... [2023-11-21 19:50:30,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:50:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:50:30,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:50:30,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:50:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:50:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 19:50:30,913 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 19:50:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-21 19:50:30,914 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-21 19:50:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 19:50:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 19:50:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 19:50:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 19:50:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-21 19:50:30,915 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-21 19:50:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 19:50:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 19:50:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 19:50:30,916 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 19:50:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-21 19:50:30,917 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-21 19:50:30,917 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-21 19:50:30,918 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-21 19:50:30,918 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-21 19:50:30,919 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-21 19:50:30,919 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 19:50:30,919 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 19:50:30,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:50:30,920 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 19:50:30,920 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 19:50:30,920 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-21 19:50:30,921 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-21 19:50:30,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:50:30,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:50:30,922 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 19:50:30,922 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 19:50:30,922 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-21 19:50:30,922 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-21 19:50:31,071 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:50:31,074 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:50:31,794 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:50:32,084 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:50:32,084 INFO L308 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-21 19:50:32,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:50:32 BoogieIcfgContainer [2023-11-21 19:50:32,086 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:50:32,089 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:50:32,090 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:50:32,094 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:50:32,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:50:30" (1/3) ... [2023-11-21 19:50:32,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6648c88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:50:32, skipping insertion in model container [2023-11-21 19:50:32,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:50:30" (2/3) ... [2023-11-21 19:50:32,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6648c88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:50:32, skipping insertion in model container [2023-11-21 19:50:32,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:50:32" (3/3) ... [2023-11-21 19:50:32,098 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-1.c [2023-11-21 19:50:32,118 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:50:32,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:50:32,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:50:32,192 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;@7985cb2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:50:32,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:50:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 120 states have (on average 1.4916666666666667) internal successors, (179), 128 states have internal predecessors, (179), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-21 19:50:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-21 19:50:32,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:32,210 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] [2023-11-21 19:50:32,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:50:32,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1692494220, now seen corresponding path program 1 times [2023-11-21 19:50:32,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:32,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975022358] [2023-11-21 19:50:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:32,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:32,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975022358] [2023-11-21 19:50:32,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975022358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:32,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:32,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:50:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549687436] [2023-11-21 19:50:32,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:32,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:50:32,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:32,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:50:32,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:50:32,929 INFO L87 Difference]: Start difference. First operand has 171 states, 120 states have (on average 1.4916666666666667) internal successors, (179), 128 states have internal predecessors, (179), 33 states have call successors, (33), 15 states have call predecessors, (33), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:50:33,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:33,668 INFO L93 Difference]: Finished difference Result 663 states and 992 transitions. [2023-11-21 19:50:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:50:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-21 19:50:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:33,687 INFO L225 Difference]: With dead ends: 663 [2023-11-21 19:50:33,688 INFO L226 Difference]: Without dead ends: 487 [2023-11-21 19:50:33,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:50:33,697 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 658 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:33,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 661 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 19:50:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-11-21 19:50:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 474. [2023-11-21 19:50:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 353 states have (on average 1.3966005665722379) internal successors, (493), 361 states have internal predecessors, (493), 82 states have call successors, (82), 39 states have call predecessors, (82), 37 states have return successors, (104), 75 states have call predecessors, (104), 78 states have call successors, (104) [2023-11-21 19:50:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 679 transitions. [2023-11-21 19:50:33,846 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 679 transitions. Word has length 41 [2023-11-21 19:50:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:33,847 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 679 transitions. [2023-11-21 19:50:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 19:50:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 679 transitions. [2023-11-21 19:50:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 19:50:33,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:33,852 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] [2023-11-21 19:50:33,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:50:33,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:50:33,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2060757962, now seen corresponding path program 1 times [2023-11-21 19:50:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:33,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412391360] [2023-11-21 19:50:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:34,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:34,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412391360] [2023-11-21 19:50:34,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412391360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:34,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:34,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:50:34,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061913742] [2023-11-21 19:50:34,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:50:34,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:34,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:50:34,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:50:34,155 INFO L87 Difference]: Start difference. First operand 474 states and 679 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2023-11-21 19:50:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:34,833 INFO L93 Difference]: Finished difference Result 602 states and 838 transitions. [2023-11-21 19:50:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 19:50:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 45 [2023-11-21 19:50:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:34,847 INFO L225 Difference]: With dead ends: 602 [2023-11-21 19:50:34,847 INFO L226 Difference]: Without dead ends: 539 [2023-11-21 19:50:34,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:50:34,853 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 363 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:34,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 606 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:50:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-11-21 19:50:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 526. [2023-11-21 19:50:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 390 states have (on average 1.3897435897435897) internal successors, (542), 398 states have internal predecessors, (542), 90 states have call successors, (90), 46 states have call predecessors, (90), 44 states have return successors, (112), 83 states have call predecessors, (112), 86 states have call successors, (112) [2023-11-21 19:50:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 744 transitions. [2023-11-21 19:50:34,933 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 744 transitions. Word has length 45 [2023-11-21 19:50:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:34,933 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 744 transitions. [2023-11-21 19:50:34,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2023-11-21 19:50:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 744 transitions. [2023-11-21 19:50:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:50:34,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:34,937 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] [2023-11-21 19:50:34,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:50:34,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:50:34,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1005081775, now seen corresponding path program 1 times [2023-11-21 19:50:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:34,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104551022] [2023-11-21 19:50:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:34,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:34,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104551022] [2023-11-21 19:50:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104551022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:34,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:50:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801703463] [2023-11-21 19:50:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:50:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:50:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:50:34,998 INFO L87 Difference]: Start difference. First operand 526 states and 744 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-21 19:50:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:35,138 INFO L93 Difference]: Finished difference Result 751 states and 1031 transitions. [2023-11-21 19:50:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:50:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2023-11-21 19:50:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:35,144 INFO L225 Difference]: With dead ends: 751 [2023-11-21 19:50:35,144 INFO L226 Difference]: Without dead ends: 635 [2023-11-21 19:50:35,145 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 [2023-11-21 19:50:35,147 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 203 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:35,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 253 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:50:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2023-11-21 19:50:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 621. [2023-11-21 19:50:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 455 states have (on average 1.367032967032967) internal successors, (622), 463 states have internal predecessors, (622), 106 states have call successors, (106), 60 states have call predecessors, (106), 58 states have return successors, (128), 99 states have call predecessors, (128), 102 states have call successors, (128) [2023-11-21 19:50:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 856 transitions. [2023-11-21 19:50:35,258 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 856 transitions. Word has length 46 [2023-11-21 19:50:35,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:35,259 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 856 transitions. [2023-11-21 19:50:35,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-21 19:50:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 856 transitions. [2023-11-21 19:50:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 19:50:35,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:35,262 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] [2023-11-21 19:50:35,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:50:35,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:50:35,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:35,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1770510076, now seen corresponding path program 1 times [2023-11-21 19:50:35,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:35,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309222609] [2023-11-21 19:50:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:35,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:35,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:35,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309222609] [2023-11-21 19:50:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309222609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:35,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:50:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408722971] [2023-11-21 19:50:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:50:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:50:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:50:35,323 INFO L87 Difference]: Start difference. First operand 621 states and 856 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) [2023-11-21 19:50:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:35,508 INFO L93 Difference]: Finished difference Result 985 states and 1304 transitions. [2023-11-21 19:50:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:50:35,509 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 [2023-11-21 19:50:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:35,516 INFO L225 Difference]: With dead ends: 985 [2023-11-21 19:50:35,516 INFO L226 Difference]: Without dead ends: 775 [2023-11-21 19:50:35,518 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 [2023-11-21 19:50:35,519 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 68 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:35,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 362 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:50:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2023-11-21 19:50:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 771. [2023-11-21 19:50:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 560 states have (on average 1.3517857142857144) internal successors, (757), 568 states have internal predecessors, (757), 130 states have call successors, (130), 81 states have call predecessors, (130), 79 states have return successors, (152), 123 states have call predecessors, (152), 126 states have call successors, (152) [2023-11-21 19:50:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1039 transitions. [2023-11-21 19:50:35,630 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1039 transitions. Word has length 47 [2023-11-21 19:50:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:35,632 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1039 transitions. [2023-11-21 19:50:35,632 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) [2023-11-21 19:50:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1039 transitions. [2023-11-21 19:50:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-21 19:50:35,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:35,635 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, 1, 1, 1, 1, 1, 1] [2023-11-21 19:50:35,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:50:35,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:50:35,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash 999471779, now seen corresponding path program 1 times [2023-11-21 19:50:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:35,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862025930] [2023-11-21 19:50:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:35,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:35,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862025930] [2023-11-21 19:50:35,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862025930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:35,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:50:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802903899] [2023-11-21 19:50:35,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:35,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:50:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:50:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:50:35,707 INFO L87 Difference]: Start difference. First operand 771 states and 1039 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-21 19:50:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:35,923 INFO L93 Difference]: Finished difference Result 1195 states and 1561 transitions. [2023-11-21 19:50:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:50:35,924 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), 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 [2023-11-21 19:50:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:35,931 INFO L225 Difference]: With dead ends: 1195 [2023-11-21 19:50:35,932 INFO L226 Difference]: Without dead ends: 834 [2023-11-21 19:50:35,933 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 [2023-11-21 19:50:35,936 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 203 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:35,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 260 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:50:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-11-21 19:50:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 822. [2023-11-21 19:50:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 596 states have (on average 1.3406040268456376) internal successors, (799), 604 states have internal predecessors, (799), 138 states have call successors, (138), 88 states have call predecessors, (138), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2023-11-21 19:50:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1097 transitions. [2023-11-21 19:50:36,079 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1097 transitions. Word has length 53 [2023-11-21 19:50:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:36,083 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1097 transitions. [2023-11-21 19:50:36,084 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), 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) [2023-11-21 19:50:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1097 transitions. [2023-11-21 19:50:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 19:50:36,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:36,087 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] [2023-11-21 19:50:36,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:50:36,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:50:36,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash 402553063, now seen corresponding path program 1 times [2023-11-21 19:50:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427088703] [2023-11-21 19:50:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:36,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:36,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:36,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427088703] [2023-11-21 19:50:36,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427088703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:36,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:50:36,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:50:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143454543] [2023-11-21 19:50:36,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:50:36,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:50:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:50:36,222 INFO L87 Difference]: Start difference. First operand 822 states and 1097 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) [2023-11-21 19:50:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:50:36,552 INFO L93 Difference]: Finished difference Result 931 states and 1229 transitions. [2023-11-21 19:50:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:50:36,553 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 [2023-11-21 19:50:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:50:36,559 INFO L225 Difference]: With dead ends: 931 [2023-11-21 19:50:36,560 INFO L226 Difference]: Without dead ends: 928 [2023-11-21 19:50:36,561 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 [2023-11-21 19:50:36,565 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 368 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:50:36,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 239 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:50:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2023-11-21 19:50:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 821. [2023-11-21 19:50:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 596 states have (on average 1.3355704697986577) internal successors, (796), 603 states have internal predecessors, (796), 137 states have call successors, (137), 88 states have call predecessors, (137), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2023-11-21 19:50:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1093 transitions. [2023-11-21 19:50:36,692 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1093 transitions. Word has length 54 [2023-11-21 19:50:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:50:36,693 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1093 transitions. [2023-11-21 19:50:36,693 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) [2023-11-21 19:50:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1093 transitions. [2023-11-21 19:50:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-21 19:50:36,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:50:36,695 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] [2023-11-21 19:50:36,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:50:36,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:50:36,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:50:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash -406561939, now seen corresponding path program 1 times [2023-11-21 19:50:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:50:36,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989597072] [2023-11-21 19:50:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:36,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:50:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:36,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:50:36,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989597072] [2023-11-21 19:50:36,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989597072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:50:36,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981183425] [2023-11-21 19:50:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:50:36,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:50:36,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:50:36,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:50:36,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:50:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:50:36,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:50:36,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:50:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:37,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:50:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:50:37,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981183425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:50:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578356466] [2023-11-21 19:50:37,421 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-21 19:50:37,422 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:50:37,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:50:37,432 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:50:37,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:50:41,624 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 121 for LOIs [2023-11-21 19:50:41,685 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 117 for LOIs [2023-11-21 19:50:41,742 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 125 for LOIs [2023-11-21 19:50:42,599 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 121 for LOIs [2023-11-21 19:50:42,794 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 121 for LOIs [2023-11-21 19:50:43,056 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 121 for LOIs [2023-11-21 19:50:43,162 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 128 for LOIs [2023-11-21 19:50:43,271 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:50:55,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [578356466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:50:55,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:50:55,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-21 19:50:55,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542948752] [2023-11-21 19:50:55,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:50:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-21 19:50:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:50:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-21 19:50:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-21 19:50:55,752 INFO L87 Difference]: Start difference. First operand 821 states and 1093 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) [2023-11-21 19:51:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:51:15,504 INFO L93 Difference]: Finished difference Result 1280 states and 1640 transitions. [2023-11-21 19:51:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-21 19:51:15,505 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 [2023-11-21 19:51:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:51:15,511 INFO L225 Difference]: With dead ends: 1280 [2023-11-21 19:51:15,513 INFO L226 Difference]: Without dead ends: 870 [2023-11-21 19:51:15,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-11-21 19:51:15,518 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 154 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 3898 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:51:15,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 2089 Invalid, 4016 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [118 Valid, 3898 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-11-21 19:51:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-11-21 19:51:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 855. [2023-11-21 19:51:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 622 states have (on average 1.32475884244373) internal successors, (824), 629 states have internal predecessors, (824), 139 states have call successors, (139), 94 states have call predecessors, (139), 92 states have return successors, (162), 133 states have call predecessors, (162), 136 states have call successors, (162) [2023-11-21 19:51:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1125 transitions. [2023-11-21 19:51:15,630 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1125 transitions. Word has length 55 [2023-11-21 19:51:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:51:15,631 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1125 transitions. [2023-11-21 19:51:15,631 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) [2023-11-21 19:51:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1125 transitions. [2023-11-21 19:51:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-21 19:51:15,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:51:15,634 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] [2023-11-21 19:51:15,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:51:15,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:51:15,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:51:15,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:51:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash -869766798, now seen corresponding path program 1 times [2023-11-21 19:51:15,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:51:15,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483011812] [2023-11-21 19:51:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:51:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:51:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:51:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:51:15,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:51:15,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483011812] [2023-11-21 19:51:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483011812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:51:15,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:51:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:51:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081733813] [2023-11-21 19:51:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:51:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:51:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:51:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:51:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:51:15,919 INFO L87 Difference]: Start difference. First operand 855 states and 1125 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) [2023-11-21 19:51:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:51:16,088 INFO L93 Difference]: Finished difference Result 1306 states and 1681 transitions. [2023-11-21 19:51:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:51:16,089 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 [2023-11-21 19:51:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:51:16,096 INFO L225 Difference]: With dead ends: 1306 [2023-11-21 19:51:16,096 INFO L226 Difference]: Without dead ends: 1038 [2023-11-21 19:51:16,097 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 [2023-11-21 19:51:16,098 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 44 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:51:16,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 417 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:51:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2023-11-21 19:51:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 909. [2023-11-21 19:51:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 666 states have (on average 1.3258258258258258) internal successors, (883), 673 states have internal predecessors, (883), 144 states have call successors, (144), 99 states have call predecessors, (144), 97 states have return successors, (167), 138 states have call predecessors, (167), 141 states have call successors, (167) [2023-11-21 19:51:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1194 transitions. [2023-11-21 19:51:16,234 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1194 transitions. Word has length 61 [2023-11-21 19:51:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:51:16,234 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1194 transitions. [2023-11-21 19:51:16,234 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) [2023-11-21 19:51:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1194 transitions. [2023-11-21 19:51:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-21 19:51:16,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:51:16,238 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] [2023-11-21 19:51:16,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 19:51:16,238 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:51:16,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:51:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash 548643408, now seen corresponding path program 1 times [2023-11-21 19:51:16,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:51:16,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934313440] [2023-11-21 19:51:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:51:16,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:51:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:51:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:51:16,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:51:16,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934313440] [2023-11-21 19:51:16,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934313440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:51:16,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:51:16,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:51:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538455962] [2023-11-21 19:51:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:51:16,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:51:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:51:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:51:16,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:51:16,421 INFO L87 Difference]: Start difference. First operand 909 states and 1194 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) [2023-11-21 19:51:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:51:17,050 INFO L93 Difference]: Finished difference Result 1589 states and 2011 transitions. [2023-11-21 19:51:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 19:51:17,052 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 [2023-11-21 19:51:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:51:17,060 INFO L225 Difference]: With dead ends: 1589 [2023-11-21 19:51:17,061 INFO L226 Difference]: Without dead ends: 1172 [2023-11-21 19:51:17,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:51:17,063 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 333 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:51:17,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 659 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:51:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2023-11-21 19:51:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1137. [2023-11-21 19:51:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 819 states have (on average 1.3015873015873016) internal successors, (1066), 826 states have internal predecessors, (1066), 184 states have call successors, (184), 134 states have call predecessors, (184), 132 states have return successors, (207), 178 states have call predecessors, (207), 181 states have call successors, (207) [2023-11-21 19:51:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1457 transitions. [2023-11-21 19:51:17,208 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1457 transitions. Word has length 63 [2023-11-21 19:51:17,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:51:17,209 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1457 transitions. [2023-11-21 19:51:17,209 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) [2023-11-21 19:51:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1457 transitions. [2023-11-21 19:51:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-21 19:51:17,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:51:17,211 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] [2023-11-21 19:51:17,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:51:17,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:51:17,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:51:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash 918975506, now seen corresponding path program 1 times [2023-11-21 19:51:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:51:17,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671786619] [2023-11-21 19:51:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:51:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:51:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:51:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:51:17,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:51:17,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671786619] [2023-11-21 19:51:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671786619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:51:17,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21689264] [2023-11-21 19:51:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:51:17,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:51:17,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:51:17,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:51:17,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0530803b-29c3-4311-a683-69f4530dbae4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:51:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:51:17,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:51:17,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:51:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:51:17,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:51:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 19:51:17,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21689264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:51:17,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850964007] [2023-11-21 19:51:17,754 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-21 19:51:17,755 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:51:17,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:51:17,756 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:51:17,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs