./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E --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 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:11:21,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:11:21,963 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:11:21,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:11:21,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:11:21,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:11:21,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:11:21,999 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:11:22,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:11:22,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:11:22,000 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:11:22,000 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:11:22,001 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:11:22,001 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:11:22,001 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:11:22,001 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:11:22,001 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:11:22,001 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:11:22,001 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:11:22,002 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:11:22,002 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:11:22,002 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:11:22,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:11:22,003 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:11:22,003 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:11:22,003 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:11:22,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:11:22,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:11:22,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:11:22,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:11:22,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:11:22,004 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:11:22,004 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:11:22,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:11:22,004 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:11:22,004 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:11:22,005 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:11:22,005 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:11:22,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:11:22,005 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:11:22,005 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:11:22,005 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:11:22,005 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:11:22,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:11:22,006 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:11:22,006 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:11:22,006 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:11:22,006 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E 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 -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2024-11-14 03:11:22,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:11:22,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:11:22,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:11:22,346 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:11:22,347 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:11:22,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c Unable to find full path for "g++" [2024-11-14 03:11:24,311 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:11:24,663 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:11:24,664 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2024-11-14 03:11:24,683 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/data/56cb46d0b/df303ec4f564414c8e04a39179abedc7/FLAG828551d0f [2024-11-14 03:11:24,705 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/data/56cb46d0b/df303ec4f564414c8e04a39179abedc7 [2024-11-14 03:11:24,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:11:24,712 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:11:24,715 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:11:24,715 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:11:24,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:11:24,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:11:24" (1/1) ... [2024-11-14 03:11:24,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3072c48c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:24, skipping insertion in model container [2024-11-14 03:11:24,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:11:24" (1/1) ... [2024-11-14 03:11:24,794 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:11:24,982 WARN L250 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_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2024-11-14 03:11:25,060 WARN L250 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_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2024-11-14 03:11:25,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:11:25,161 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:11:25,174 WARN L250 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_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2024-11-14 03:11:25,200 WARN L250 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_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2024-11-14 03:11:25,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:11:25,309 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:11:25,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25 WrapperNode [2024-11-14 03:11:25,309 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:11:25,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:11:25,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:11:25,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:11:25,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,420 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 701 [2024-11-14 03:11:25,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:11:25,428 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:11:25,428 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:11:25,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:11:25,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,468 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:11:25,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:11:25,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:11:25,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:11:25,492 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (1/1) ... [2024-11-14 03:11:25,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:11:25,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:11:25,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:11:25,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:11:25,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:11:25,581 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:11:25,582 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:11:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 03:11:25,582 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 03:11:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 03:11:25,582 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 03:11:25,582 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 03:11:25,583 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 03:11:25,583 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 03:11:25,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 03:11:25,583 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 03:11:25,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 03:11:25,583 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 03:11:25,583 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 03:11:25,584 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 03:11:25,584 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 03:11:25,584 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 03:11:25,584 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 03:11:25,584 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 03:11:25,584 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 03:11:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 03:11:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 03:11:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:11:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 03:11:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 03:11:25,585 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 03:11:25,585 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 03:11:25,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:11:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:11:25,586 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 03:11:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 03:11:25,586 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-14 03:11:25,586 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-14 03:11:25,746 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:11:25,749 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:11:27,039 INFO L? ?]: Removed 95 outVars from TransFormulas that were not future-live. [2024-11-14 03:11:27,039 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:11:27,564 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:11:27,567 INFO L316 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-14 03:11:27,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:11:27 BoogieIcfgContainer [2024-11-14 03:11:27,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:11:27,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:11:27,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:11:27,578 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:11:27,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:11:24" (1/3) ... [2024-11-14 03:11:27,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132b1467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:11:27, skipping insertion in model container [2024-11-14 03:11:27,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:11:25" (2/3) ... [2024-11-14 03:11:27,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132b1467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:11:27, skipping insertion in model container [2024-11-14 03:11:27,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:11:27" (3/3) ... [2024-11-14 03:11:27,584 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2024-11-14 03:11:27,608 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:11:27,610 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c that has 16 procedures, 207 locations, 1 initial locations, 13 loop locations, and 2 error locations. [2024-11-14 03:11:27,711 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:11:27,734 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7601c71a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:11:27,735 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:11:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-14 03:11:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:11:27,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:27,757 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:27,758 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:27,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1727234301, now seen corresponding path program 1 times [2024-11-14 03:11:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:27,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039203909] [2024-11-14 03:11:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:27,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:28,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:28,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039203909] [2024-11-14 03:11:28,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039203909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:11:28,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:11:28,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:11:28,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938901461] [2024-11-14 03:11:28,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:11:28,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:11:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:11:28,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:11:28,273 INFO L87 Difference]: Start difference. First operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:11:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:28,928 INFO L93 Difference]: Finished difference Result 464 states and 675 transitions. [2024-11-14 03:11:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:11:28,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-14 03:11:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:28,949 INFO L225 Difference]: With dead ends: 464 [2024-11-14 03:11:28,949 INFO L226 Difference]: Without dead ends: 261 [2024-11-14 03:11:28,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:11:28,962 INFO L432 NwaCegarLoop]: 297 mSDtfsCounter, 348 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:28,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 506 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:11:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-14 03:11:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 254. [2024-11-14 03:11:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 188 states have (on average 1.398936170212766) internal successors, (263), 193 states have internal predecessors, (263), 44 states have call successors, (44), 22 states have call predecessors, (44), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 03:11:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 347 transitions. [2024-11-14 03:11:29,076 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 347 transitions. Word has length 45 [2024-11-14 03:11:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:29,078 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 347 transitions. [2024-11-14 03:11:29,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:11:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 347 transitions. [2024-11-14 03:11:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:11:29,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:29,082 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:29,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:11:29,083 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:29,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash -808259678, now seen corresponding path program 1 times [2024-11-14 03:11:29,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:29,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222608560] [2024-11-14 03:11:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:29,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:29,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222608560] [2024-11-14 03:11:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222608560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:11:29,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:11:29,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:11:29,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597285400] [2024-11-14 03:11:29,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:11:29,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:11:29,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:11:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:11:29,394 INFO L87 Difference]: Start difference. First operand 254 states and 347 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:11:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:30,592 INFO L93 Difference]: Finished difference Result 656 states and 850 transitions. [2024-11-14 03:11:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:11:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-14 03:11:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:30,599 INFO L225 Difference]: With dead ends: 656 [2024-11-14 03:11:30,599 INFO L226 Difference]: Without dead ends: 524 [2024-11-14 03:11:30,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:11:30,602 INFO L432 NwaCegarLoop]: 378 mSDtfsCounter, 708 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:30,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 954 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:11:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-11-14 03:11:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 440. [2024-11-14 03:11:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 320 states have (on average 1.321875) internal successors, (423), 326 states have internal predecessors, (423), 71 states have call successors, (71), 45 states have call predecessors, (71), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2024-11-14 03:11:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 565 transitions. [2024-11-14 03:11:30,698 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 565 transitions. Word has length 45 [2024-11-14 03:11:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:30,699 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 565 transitions. [2024-11-14 03:11:30,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 03:11:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 565 transitions. [2024-11-14 03:11:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:11:30,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:30,704 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:30,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:11:30,705 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:30,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:30,705 INFO L85 PathProgramCache]: Analyzing trace with hash 322504795, now seen corresponding path program 1 times [2024-11-14 03:11:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:30,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670986159] [2024-11-14 03:11:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:30,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:31,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670986159] [2024-11-14 03:11:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670986159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:11:31,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:11:31,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:11:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768991605] [2024-11-14 03:11:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:11:31,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:11:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:11:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:11:31,235 INFO L87 Difference]: Start difference. First operand 440 states and 565 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 03:11:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:32,412 INFO L93 Difference]: Finished difference Result 956 states and 1181 transitions. [2024-11-14 03:11:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:11:32,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-14 03:11:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:32,423 INFO L225 Difference]: With dead ends: 956 [2024-11-14 03:11:32,423 INFO L226 Difference]: Without dead ends: 654 [2024-11-14 03:11:32,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:11:32,429 INFO L432 NwaCegarLoop]: 165 mSDtfsCounter, 410 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:32,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 751 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:11:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2024-11-14 03:11:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 619. [2024-11-14 03:11:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 445 states have (on average 1.2921348314606742) internal successors, (575), 452 states have internal predecessors, (575), 98 states have call successors, (98), 68 states have call predecessors, (98), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2024-11-14 03:11:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 775 transitions. [2024-11-14 03:11:32,520 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 775 transitions. Word has length 46 [2024-11-14 03:11:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:32,521 INFO L471 AbstractCegarLoop]: Abstraction has 619 states and 775 transitions. [2024-11-14 03:11:32,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 03:11:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 775 transitions. [2024-11-14 03:11:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:11:32,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:32,528 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:32,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:11:32,528 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:32,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1181212883, now seen corresponding path program 1 times [2024-11-14 03:11:32,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:32,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16145739] [2024-11-14 03:11:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:32,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:32,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:32,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16145739] [2024-11-14 03:11:32,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16145739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:11:32,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:11:32,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:11:32,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3267248] [2024-11-14 03:11:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:11:32,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:11:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:11:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:11:32,648 INFO L87 Difference]: Start difference. First operand 619 states and 775 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:11:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:32,893 INFO L93 Difference]: Finished difference Result 1183 states and 1445 transitions. [2024-11-14 03:11:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:11:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-14 03:11:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:32,900 INFO L225 Difference]: With dead ends: 1183 [2024-11-14 03:11:32,901 INFO L226 Difference]: Without dead ends: 751 [2024-11-14 03:11:32,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:11:32,903 INFO L432 NwaCegarLoop]: 246 mSDtfsCounter, 67 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:32,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 461 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:11:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2024-11-14 03:11:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 646. [2024-11-14 03:11:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 468 states have (on average 1.2820512820512822) internal successors, (600), 475 states have internal predecessors, (600), 100 states have call successors, (100), 70 states have call predecessors, (100), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-14 03:11:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 804 transitions. [2024-11-14 03:11:32,991 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 804 transitions. Word has length 47 [2024-11-14 03:11:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:32,991 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 804 transitions. [2024-11-14 03:11:32,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:11:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 804 transitions. [2024-11-14 03:11:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:11:32,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:32,994 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:32,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:11:32,995 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:32,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -598402605, now seen corresponding path program 1 times [2024-11-14 03:11:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:32,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927677231] [2024-11-14 03:11:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:33,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927677231] [2024-11-14 03:11:33,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927677231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:11:33,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:11:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:11:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009699675] [2024-11-14 03:11:33,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:11:33,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:11:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:11:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:11:33,210 INFO L87 Difference]: Start difference. First operand 646 states and 804 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-14 03:11:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:34,274 INFO L93 Difference]: Finished difference Result 1239 states and 1732 transitions. [2024-11-14 03:11:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:11:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 50 [2024-11-14 03:11:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:34,291 INFO L225 Difference]: With dead ends: 1239 [2024-11-14 03:11:34,291 INFO L226 Difference]: Without dead ends: 1112 [2024-11-14 03:11:34,293 INFO L431 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 [2024-11-14 03:11:34,296 INFO L432 NwaCegarLoop]: 370 mSDtfsCounter, 932 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:34,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 924 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:11:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2024-11-14 03:11:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1099. [2024-11-14 03:11:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 836 states have (on average 1.354066985645933) internal successors, (1132), 846 states have internal predecessors, (1132), 161 states have call successors, (161), 94 states have call predecessors, (161), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2024-11-14 03:11:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1496 transitions. [2024-11-14 03:11:34,496 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1496 transitions. Word has length 50 [2024-11-14 03:11:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:34,499 INFO L471 AbstractCegarLoop]: Abstraction has 1099 states and 1496 transitions. [2024-11-14 03:11:34,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-14 03:11:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1496 transitions. [2024-11-14 03:11:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 03:11:34,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:34,502 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:34,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:11:34,502 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:34,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1546280102, now seen corresponding path program 1 times [2024-11-14 03:11:34,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:34,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943676210] [2024-11-14 03:11:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:34,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:11:34,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:34,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943676210] [2024-11-14 03:11:34,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943676210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:11:34,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:11:34,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:11:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119782721] [2024-11-14 03:11:34,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:11:34,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:11:34,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:11:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:11:34,628 INFO L87 Difference]: Start difference. First operand 1099 states and 1496 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:11:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:34,868 INFO L93 Difference]: Finished difference Result 1289 states and 1717 transitions. [2024-11-14 03:11:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:11:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-14 03:11:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:34,884 INFO L225 Difference]: With dead ends: 1289 [2024-11-14 03:11:34,884 INFO L226 Difference]: Without dead ends: 1016 [2024-11-14 03:11:34,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:11:34,887 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 253 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:34,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 309 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:11:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2024-11-14 03:11:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 907. [2024-11-14 03:11:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 696 states have (on average 1.3649425287356323) internal successors, (950), 704 states have internal predecessors, (950), 137 states have call successors, (137), 74 states have call predecessors, (137), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2024-11-14 03:11:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1258 transitions. [2024-11-14 03:11:35,051 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1258 transitions. Word has length 53 [2024-11-14 03:11:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:35,052 INFO L471 AbstractCegarLoop]: Abstraction has 907 states and 1258 transitions. [2024-11-14 03:11:35,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:11:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1258 transitions. [2024-11-14 03:11:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 03:11:35,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:35,055 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:35,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:11:35,055 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:35,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash -339990536, now seen corresponding path program 1 times [2024-11-14 03:11:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051191032] [2024-11-14 03:11:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:35,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:35,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051191032] [2024-11-14 03:11:35,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051191032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:11:35,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:11:35,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:11:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755164660] [2024-11-14 03:11:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:11:35,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:11:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:11:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:11:35,239 INFO L87 Difference]: Start difference. First operand 907 states and 1258 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 03:11:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:35,752 INFO L93 Difference]: Finished difference Result 1010 states and 1374 transitions. [2024-11-14 03:11:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:11:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-14 03:11:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:35,766 INFO L225 Difference]: With dead ends: 1010 [2024-11-14 03:11:35,767 INFO L226 Difference]: Without dead ends: 1007 [2024-11-14 03:11:35,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:11:35,768 INFO L432 NwaCegarLoop]: 240 mSDtfsCounter, 463 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:35,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 280 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:11:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-11-14 03:11:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 906. [2024-11-14 03:11:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 696 states have (on average 1.360632183908046) internal successors, (947), 703 states have internal predecessors, (947), 136 states have call successors, (136), 74 states have call predecessors, (136), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2024-11-14 03:11:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1254 transitions. [2024-11-14 03:11:35,924 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1254 transitions. Word has length 54 [2024-11-14 03:11:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:35,925 INFO L471 AbstractCegarLoop]: Abstraction has 906 states and 1254 transitions. [2024-11-14 03:11:35,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 03:11:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1254 transitions. [2024-11-14 03:11:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 03:11:35,927 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:35,927 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:35,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:11:35,928 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:35,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1950791397, now seen corresponding path program 1 times [2024-11-14 03:11:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:35,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938275902] [2024-11-14 03:11:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:36,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938275902] [2024-11-14 03:11:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938275902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:11:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610153055] [2024-11-14 03:11:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:36,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:11:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:11:36,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:11:36,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:11:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:36,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:11:36,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:11:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:36,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:11:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:11:37,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610153055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:11:37,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1974018071] [2024-11-14 03:11:37,059 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 03:11:37,059 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:11:37,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:11:37,070 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:11:37,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:11:42,844 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2024-11-14 03:11:42,896 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 147 for LOIs [2024-11-14 03:11:42,963 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2024-11-14 03:11:43,692 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2024-11-14 03:11:43,828 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2024-11-14 03:11:43,973 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2024-11-14 03:11:44,023 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2024-11-14 03:11:44,074 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:00,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1974018071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:00,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:00,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 03:12:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994347513] [2024-11-14 03:12:00,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:00,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:12:00,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:00,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:12:00,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:12:00,479 INFO L87 Difference]: Start difference. First operand 906 states and 1254 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 03:12:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:12,338 INFO L93 Difference]: Finished difference Result 1248 states and 1647 transitions. [2024-11-14 03:12:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:12:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-14 03:12:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:12,347 INFO L225 Difference]: With dead ends: 1248 [2024-11-14 03:12:12,347 INFO L226 Difference]: Without dead ends: 933 [2024-11-14 03:12:12,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:12:12,353 INFO L432 NwaCegarLoop]: 221 mSDtfsCounter, 140 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:12,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1588 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-14 03:12:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2024-11-14 03:12:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 925. [2024-11-14 03:12:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 713 states have (on average 1.3562412342215988) internal successors, (967), 720 states have internal predecessors, (967), 137 states have call successors, (137), 75 states have call predecessors, (137), 73 states have return successors, (172), 131 states have call predecessors, (172), 134 states have call successors, (172) [2024-11-14 03:12:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1276 transitions. [2024-11-14 03:12:12,487 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1276 transitions. Word has length 55 [2024-11-14 03:12:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:12,487 INFO L471 AbstractCegarLoop]: Abstraction has 925 states and 1276 transitions. [2024-11-14 03:12:12,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 03:12:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1276 transitions. [2024-11-14 03:12:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 03:12:12,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:12,490 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:12,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:12:12,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:12,695 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:12,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1495032518, now seen corresponding path program 1 times [2024-11-14 03:12:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:12,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396596231] [2024-11-14 03:12:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:12,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:12:12,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:12,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396596231] [2024-11-14 03:12:12,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396596231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:12,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:12,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:12:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404075428] [2024-11-14 03:12:12,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:12,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:12:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:12:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:12,759 INFO L87 Difference]: Start difference. First operand 925 states and 1276 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) [2024-11-14 03:12:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:12,978 INFO L93 Difference]: Finished difference Result 1206 states and 1598 transitions. [2024-11-14 03:12:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:12:12,979 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 [2024-11-14 03:12:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:12,986 INFO L225 Difference]: With dead ends: 1206 [2024-11-14 03:12:12,986 INFO L226 Difference]: Without dead ends: 1037 [2024-11-14 03:12:12,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:12,989 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 42 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:12,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 498 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2024-11-14 03:12:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 960. [2024-11-14 03:12:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 742 states have (on average 1.3517520215633423) internal successors, (1003), 749 states have internal predecessors, (1003), 140 states have call successors, (140), 78 states have call predecessors, (140), 76 states have return successors, (175), 134 states have call predecessors, (175), 137 states have call successors, (175) [2024-11-14 03:12:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1318 transitions. [2024-11-14 03:12:13,116 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1318 transitions. Word has length 61 [2024-11-14 03:12:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:13,117 INFO L471 AbstractCegarLoop]: Abstraction has 960 states and 1318 transitions. [2024-11-14 03:12:13,117 INFO L472 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) [2024-11-14 03:12:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1318 transitions. [2024-11-14 03:12:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 03:12:13,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:13,124 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:13,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:12:13,124 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:13,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2142325908, now seen corresponding path program 1 times [2024-11-14 03:12:13,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:13,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48863535] [2024-11-14 03:12:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:13,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:12:13,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:13,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48863535] [2024-11-14 03:12:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48863535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:13,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60363821] [2024-11-14 03:12:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:13,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:13,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:13,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:12:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:13,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:12:13,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:12:13,792 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:12:13,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60363821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:13,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:12:13,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 03:12:13,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153212080] [2024-11-14 03:12:13,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:13,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:12:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:12:13,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:12:13,795 INFO L87 Difference]: Start difference. First operand 960 states and 1318 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:12:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:14,180 INFO L93 Difference]: Finished difference Result 1220 states and 1618 transitions. [2024-11-14 03:12:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:12:14,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-14 03:12:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:14,185 INFO L225 Difference]: With dead ends: 1220 [2024-11-14 03:12:14,186 INFO L226 Difference]: Without dead ends: 851 [2024-11-14 03:12:14,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:12:14,188 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 210 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:14,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1000 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2024-11-14 03:12:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 847. [2024-11-14 03:12:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 667 states have (on average 1.3718140929535232) internal successors, (915), 674 states have internal predecessors, (915), 119 states have call successors, (119), 61 states have call predecessors, (119), 59 states have return successors, (154), 113 states have call predecessors, (154), 116 states have call successors, (154) [2024-11-14 03:12:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1188 transitions. [2024-11-14 03:12:14,303 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1188 transitions. Word has length 102 [2024-11-14 03:12:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:14,304 INFO L471 AbstractCegarLoop]: Abstraction has 847 states and 1188 transitions. [2024-11-14 03:12:14,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:12:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1188 transitions. [2024-11-14 03:12:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 03:12:14,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:14,309 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:14,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:14,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:14,513 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:14,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:14,514 INFO L85 PathProgramCache]: Analyzing trace with hash 748428430, now seen corresponding path program 1 times [2024-11-14 03:12:14,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:14,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309029205] [2024-11-14 03:12:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:12:14,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:14,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309029205] [2024-11-14 03:12:14,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309029205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:14,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200742961] [2024-11-14 03:12:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:14,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:14,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:14,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:12:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:14,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:12:14,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:12:15,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 03:12:15,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200742961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:15,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515626278] [2024-11-14 03:12:15,469 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 03:12:15,470 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:15,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:15,470 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:15,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:28,166 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 189 for LOIs [2024-11-14 03:12:28,391 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 160 for LOIs [2024-11-14 03:12:28,678 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2024-11-14 03:12:28,704 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 174 for LOIs [2024-11-14 03:12:30,395 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2024-11-14 03:12:31,760 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 124 for LOIs [2024-11-14 03:12:31,880 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 168 for LOIs [2024-11-14 03:12:32,115 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 179 for LOIs [2024-11-14 03:12:32,354 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:08,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26956#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_19| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 0))))) (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (not (= ~p_dw_st~0 0)))) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 03:13:08,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:08,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:08,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 03:13:08,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107726598] [2024-11-14 03:13:08,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:08,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:13:08,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:08,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:13:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:13:08,429 INFO L87 Difference]: Start difference. First operand 847 states and 1188 transitions. Second operand has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 03:13:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:12,123 INFO L93 Difference]: Finished difference Result 1787 states and 2275 transitions. [2024-11-14 03:13:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 03:13:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) Word has length 104 [2024-11-14 03:13:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:12,133 INFO L225 Difference]: With dead ends: 1787 [2024-11-14 03:13:12,133 INFO L226 Difference]: Without dead ends: 1605 [2024-11-14 03:13:12,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4820 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 03:13:12,139 INFO L432 NwaCegarLoop]: 243 mSDtfsCounter, 1207 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:12,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 1773 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:13:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2024-11-14 03:13:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1242. [2024-11-14 03:13:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 952 states have (on average 1.3130252100840336) internal successors, (1250), 959 states have internal predecessors, (1250), 177 states have call successors, (177), 113 states have call predecessors, (177), 111 states have return successors, (212), 171 states have call predecessors, (212), 174 states have call successors, (212) [2024-11-14 03:13:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1639 transitions. [2024-11-14 03:13:12,337 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1639 transitions. Word has length 104 [2024-11-14 03:13:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:12,338 INFO L471 AbstractCegarLoop]: Abstraction has 1242 states and 1639 transitions. [2024-11-14 03:13:12,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 03:13:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1639 transitions. [2024-11-14 03:13:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:13:12,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:12,343 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:12,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:13:12,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:12,547 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:12,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 833324002, now seen corresponding path program 1 times [2024-11-14 03:13:12,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:12,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428915229] [2024-11-14 03:13:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:12,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:13:12,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428915229] [2024-11-14 03:13:12,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428915229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851198059] [2024-11-14 03:13:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:12,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:12,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:12,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:12,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:13:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:12,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:13:12,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:13:12,880 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:13:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851198059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:12,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:13:12,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:13:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850708012] [2024-11-14 03:13:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:12,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:13:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:13:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:13:12,883 INFO L87 Difference]: Start difference. First operand 1242 states and 1639 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:13:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:13,225 INFO L93 Difference]: Finished difference Result 2386 states and 3439 transitions. [2024-11-14 03:13:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:13:13,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2024-11-14 03:13:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:13,238 INFO L225 Difference]: With dead ends: 2386 [2024-11-14 03:13:13,239 INFO L226 Difference]: Without dead ends: 1806 [2024-11-14 03:13:13,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:13:13,244 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 249 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:13,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 387 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2024-11-14 03:13:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1797. [2024-11-14 03:13:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1405 states have (on average 1.3523131672597866) internal successors, (1900), 1415 states have internal predecessors, (1900), 249 states have call successors, (249), 143 states have call predecessors, (249), 141 states have return successors, (318), 240 states have call predecessors, (318), 246 states have call successors, (318) [2024-11-14 03:13:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2467 transitions. [2024-11-14 03:13:13,491 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2467 transitions. Word has length 96 [2024-11-14 03:13:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:13,491 INFO L471 AbstractCegarLoop]: Abstraction has 1797 states and 2467 transitions. [2024-11-14 03:13:13,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:13:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2467 transitions. [2024-11-14 03:13:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:13:13,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:13,495 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:13,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:13:13,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:13,696 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:13,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:13,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1336661762, now seen corresponding path program 1 times [2024-11-14 03:13:13,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:13,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417839974] [2024-11-14 03:13:13,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:13,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:13:13,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:13,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417839974] [2024-11-14 03:13:13,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417839974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:13,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675329955] [2024-11-14 03:13:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:13,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:13,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:13,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:13,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:13:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:13,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:13:13,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:13:14,017 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:13:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675329955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:14,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:13:14,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:13:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512412099] [2024-11-14 03:13:14,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:14,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:13:14,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:13:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:13:14,019 INFO L87 Difference]: Start difference. First operand 1797 states and 2467 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:13:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:14,473 INFO L93 Difference]: Finished difference Result 4036 states and 5961 transitions. [2024-11-14 03:13:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:13:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2024-11-14 03:13:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:14,492 INFO L225 Difference]: With dead ends: 4036 [2024-11-14 03:13:14,492 INFO L226 Difference]: Without dead ends: 2901 [2024-11-14 03:13:14,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:13:14,499 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 252 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:14,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 387 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2024-11-14 03:13:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2887. [2024-11-14 03:13:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2296 states have (on average 1.3806620209059233) internal successors, (3170), 2312 states have internal predecessors, (3170), 388 states have call successors, (388), 203 states have call predecessors, (388), 201 states have return successors, (521), 373 states have call predecessors, (521), 385 states have call successors, (521) [2024-11-14 03:13:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4079 transitions. [2024-11-14 03:13:14,860 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4079 transitions. Word has length 96 [2024-11-14 03:13:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:14,860 INFO L471 AbstractCegarLoop]: Abstraction has 2887 states and 4079 transitions. [2024-11-14 03:13:14,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:13:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4079 transitions. [2024-11-14 03:13:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:13:14,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:14,868 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:14,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:13:15,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:13:15,073 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:15,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1753927710, now seen corresponding path program 1 times [2024-11-14 03:13:15,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:15,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421602580] [2024-11-14 03:13:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:13:15,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421602580] [2024-11-14 03:13:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421602580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:15,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023631641] [2024-11-14 03:13:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:15,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:15,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:15,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:13:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:15,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:13:15,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:13:15,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:13:15,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023631641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:15,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:13:15,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:13:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248778268] [2024-11-14 03:13:15,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:15,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:13:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:13:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:13:15,402 INFO L87 Difference]: Start difference. First operand 2887 states and 4079 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:13:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:15,974 INFO L93 Difference]: Finished difference Result 7276 states and 10864 transitions. [2024-11-14 03:13:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:13:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2024-11-14 03:13:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:16,005 INFO L225 Difference]: With dead ends: 7276 [2024-11-14 03:13:16,005 INFO L226 Difference]: Without dead ends: 5051 [2024-11-14 03:13:16,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:13:16,017 INFO L432 NwaCegarLoop]: 232 mSDtfsCounter, 243 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:16,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 382 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2024-11-14 03:13:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 5027. [2024-11-14 03:13:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 4048 states have (on average 1.3957509881422925) internal successors, (5650), 4076 states have internal predecessors, (5650), 656 states have call successors, (656), 323 states have call predecessors, (656), 321 states have return successors, (909), 629 states have call predecessors, (909), 653 states have call successors, (909) [2024-11-14 03:13:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 7215 transitions. [2024-11-14 03:13:16,608 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 7215 transitions. Word has length 96 [2024-11-14 03:13:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:16,608 INFO L471 AbstractCegarLoop]: Abstraction has 5027 states and 7215 transitions. [2024-11-14 03:13:16,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:13:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 7215 transitions. [2024-11-14 03:13:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 03:13:16,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:16,616 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:16,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 03:13:16,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:13:16,817 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:16,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash 75127554, now seen corresponding path program 1 times [2024-11-14 03:13:16,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:16,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835472504] [2024-11-14 03:13:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:13:16,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:16,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835472504] [2024-11-14 03:13:16,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835472504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:16,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:13:16,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:13:16,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434043330] [2024-11-14 03:13:16,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:16,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:13:16,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:13:16,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:13:16,914 INFO L87 Difference]: Start difference. First operand 5027 states and 7215 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-11-14 03:13:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:17,574 INFO L93 Difference]: Finished difference Result 9575 states and 14206 transitions. [2024-11-14 03:13:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:13:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 96 [2024-11-14 03:13:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:17,615 INFO L225 Difference]: With dead ends: 9575 [2024-11-14 03:13:17,616 INFO L226 Difference]: Without dead ends: 6067 [2024-11-14 03:13:17,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:13:17,630 INFO L432 NwaCegarLoop]: 317 mSDtfsCounter, 80 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:17,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 556 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2024-11-14 03:13:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 5699. [2024-11-14 03:13:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 4688 states have (on average 1.4219283276450512) internal successors, (6666), 4716 states have internal predecessors, (6666), 672 states have call successors, (672), 339 states have call predecessors, (672), 337 states have return successors, (925), 645 states have call predecessors, (925), 669 states have call successors, (925) [2024-11-14 03:13:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 8263 transitions. [2024-11-14 03:13:18,255 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 8263 transitions. Word has length 96 [2024-11-14 03:13:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:18,256 INFO L471 AbstractCegarLoop]: Abstraction has 5699 states and 8263 transitions. [2024-11-14 03:13:18,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-11-14 03:13:18,256 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 8263 transitions. [2024-11-14 03:13:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 03:13:18,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:18,265 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:18,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 03:13:18,265 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:18,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1374680186, now seen corresponding path program 1 times [2024-11-14 03:13:18,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:18,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609552520] [2024-11-14 03:13:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:13:18,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:18,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609552520] [2024-11-14 03:13:18,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609552520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:18,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:13:18,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:13:18,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009507860] [2024-11-14 03:13:18,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:18,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:13:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:13:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:13:18,327 INFO L87 Difference]: Start difference. First operand 5699 states and 8263 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 03:13:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:18,962 INFO L93 Difference]: Finished difference Result 6198 states and 8835 transitions. [2024-11-14 03:13:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:13:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2024-11-14 03:13:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:19,009 INFO L225 Difference]: With dead ends: 6198 [2024-11-14 03:13:19,009 INFO L226 Difference]: Without dead ends: 5689 [2024-11-14 03:13:19,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:13:19,013 INFO L432 NwaCegarLoop]: 272 mSDtfsCounter, 256 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:19,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 338 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:13:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2024-11-14 03:13:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 5680. [2024-11-14 03:13:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 4671 states have (on average 1.4202526225647614) internal successors, (6634), 4699 states have internal predecessors, (6634), 671 states have call successors, (671), 338 states have call predecessors, (671), 336 states have return successors, (924), 644 states have call predecessors, (924), 668 states have call successors, (924) [2024-11-14 03:13:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 8229 transitions. [2024-11-14 03:13:19,613 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 8229 transitions. Word has length 108 [2024-11-14 03:13:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:19,614 INFO L471 AbstractCegarLoop]: Abstraction has 5680 states and 8229 transitions. [2024-11-14 03:13:19,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 03:13:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 8229 transitions. [2024-11-14 03:13:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 03:13:19,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:19,625 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:19,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 03:13:19,626 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:19,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:19,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1317629776, now seen corresponding path program 1 times [2024-11-14 03:13:19,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:19,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143633787] [2024-11-14 03:13:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 03:13:19,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143633787] [2024-11-14 03:13:19,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143633787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509576790] [2024-11-14 03:13:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:19,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:19,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:19,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:19,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:13:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:19,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:13:19,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:13:20,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:13:20,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509576790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:20,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:13:20,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 03:13:20,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331382610] [2024-11-14 03:13:20,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:20,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:13:20,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:20,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:13:20,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:13:20,039 INFO L87 Difference]: Start difference. First operand 5680 states and 8229 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:13:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:20,786 INFO L93 Difference]: Finished difference Result 6200 states and 8823 transitions. [2024-11-14 03:13:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:13:20,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2024-11-14 03:13:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:20,825 INFO L225 Difference]: With dead ends: 6200 [2024-11-14 03:13:20,825 INFO L226 Difference]: Without dead ends: 5651 [2024-11-14 03:13:20,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:13:20,831 INFO L432 NwaCegarLoop]: 261 mSDtfsCounter, 47 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:20,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1267 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:13:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2024-11-14 03:13:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 5591. [2024-11-14 03:13:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5591 states, 4610 states have (on average 1.4238611713665943) internal successors, (6564), 4638 states have internal predecessors, (6564), 656 states have call successors, (656), 325 states have call predecessors, (656), 323 states have return successors, (909), 629 states have call predecessors, (909), 653 states have call successors, (909) [2024-11-14 03:13:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5591 states to 5591 states and 8129 transitions. [2024-11-14 03:13:21,384 INFO L78 Accepts]: Start accepts. Automaton has 5591 states and 8129 transitions. Word has length 112 [2024-11-14 03:13:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:21,384 INFO L471 AbstractCegarLoop]: Abstraction has 5591 states and 8129 transitions. [2024-11-14 03:13:21,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 03:13:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5591 states and 8129 transitions. [2024-11-14 03:13:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 03:13:21,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:21,394 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:21,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:13:21,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:13:21,594 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:21,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1236505509, now seen corresponding path program 1 times [2024-11-14 03:13:21,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:21,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962077530] [2024-11-14 03:13:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:21,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 03:13:21,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962077530] [2024-11-14 03:13:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962077530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:13:21,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:13:21,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:13:21,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448629866] [2024-11-14 03:13:21,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:13:21,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:13:21,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:13:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:13:21,713 INFO L87 Difference]: Start difference. First operand 5591 states and 8129 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 03:13:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:22,731 INFO L93 Difference]: Finished difference Result 6340 states and 8974 transitions. [2024-11-14 03:13:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:13:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2024-11-14 03:13:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:22,761 INFO L225 Difference]: With dead ends: 6340 [2024-11-14 03:13:22,761 INFO L226 Difference]: Without dead ends: 5883 [2024-11-14 03:13:22,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:13:22,766 INFO L432 NwaCegarLoop]: 266 mSDtfsCounter, 245 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:22,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1124 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:13:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2024-11-14 03:13:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 5849. [2024-11-14 03:13:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4772 states have (on average 1.413243922883487) internal successors, (6744), 4806 states have internal predecessors, (6744), 704 states have call successors, (704), 367 states have call predecessors, (704), 371 states have return successors, (969), 677 states have call predecessors, (969), 701 states have call successors, (969) [2024-11-14 03:13:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 8417 transitions. [2024-11-14 03:13:23,361 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 8417 transitions. Word has length 113 [2024-11-14 03:13:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:23,362 INFO L471 AbstractCegarLoop]: Abstraction has 5849 states and 8417 transitions. [2024-11-14 03:13:23,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 03:13:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 8417 transitions. [2024-11-14 03:13:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 03:13:23,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:23,373 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:23,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 03:13:23,373 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:23,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash -709117283, now seen corresponding path program 1 times [2024-11-14 03:13:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008101550] [2024-11-14 03:13:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:13:24,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008101550] [2024-11-14 03:13:24,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008101550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268835031] [2024-11-14 03:13:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:24,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:24,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:24,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:24,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:13:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:24,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 03:13:24,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:13:25,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 03:13:27,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268835031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:27,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128440989] [2024-11-14 03:13:27,121 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 03:13:27,122 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:27,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:27,122 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:27,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:51,545 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 200 for LOIs [2024-11-14 03:13:51,725 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 03:13:51,726 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:13:51,729 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 164 for LOIs [2024-11-14 03:13:52,720 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2024-11-14 03:13:53,539 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:13:53,579 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 158 for LOIs [2024-11-14 03:13:53,731 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 169 for LOIs [2024-11-14 03:13:53,873 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:14:08,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '131372#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2024-11-14 03:14:08,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:14:08,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:14:08,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 50 [2024-11-14 03:14:08,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638100268] [2024-11-14 03:14:08,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:14:08,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 03:14:08,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 03:14:08,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=8884, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 03:14:08,966 INFO L87 Difference]: Start difference. First operand 5849 states and 8417 transitions. Second operand has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-14 03:14:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:20,530 INFO L93 Difference]: Finished difference Result 7972 states and 10989 transitions. [2024-11-14 03:14:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-14 03:14:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) Word has length 114 [2024-11-14 03:14:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:20,570 INFO L225 Difference]: With dead ends: 7972 [2024-11-14 03:14:20,570 INFO L226 Difference]: Without dead ends: 7257 [2024-11-14 03:14:20,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 278 SyntacticMatches, 12 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 18450 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=5867, Invalid=43195, Unknown=0, NotChecked=0, Total=49062 [2024-11-14 03:14:20,588 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 3222 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 4567 mSolverCounterSat, 1594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3222 SdHoareTripleChecker+Valid, 3602 SdHoareTripleChecker+Invalid, 6161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1594 IncrementalHoareTripleChecker+Valid, 4567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:20,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3222 Valid, 3602 Invalid, 6161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1594 Valid, 4567 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 03:14:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7257 states. [2024-11-14 03:14:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7257 to 5849. [2024-11-14 03:14:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4772 states have (on average 1.4124056999161776) internal successors, (6740), 4806 states have internal predecessors, (6740), 704 states have call successors, (704), 367 states have call predecessors, (704), 371 states have return successors, (969), 677 states have call predecessors, (969), 701 states have call successors, (969) [2024-11-14 03:14:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 8413 transitions. [2024-11-14 03:14:21,559 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 8413 transitions. Word has length 114 [2024-11-14 03:14:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:21,560 INFO L471 AbstractCegarLoop]: Abstraction has 5849 states and 8413 transitions. [2024-11-14 03:14:21,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-14 03:14:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 8413 transitions. [2024-11-14 03:14:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 03:14:21,572 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:21,572 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:21,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:14:21,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:21,773 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:21,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash -356029736, now seen corresponding path program 1 times [2024-11-14 03:14:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:21,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321617618] [2024-11-14 03:14:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:21,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:14:22,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:22,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321617618] [2024-11-14 03:14:22,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321617618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:22,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096245880] [2024-11-14 03:14:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:22,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:22,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:22,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:22,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:14:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:22,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:14:22,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:14:22,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:14:22,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096245880] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:22,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:14:22,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 03:14:22,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355181103] [2024-11-14 03:14:22,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:14:22,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:14:22,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:14:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:14:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:14:22,743 INFO L87 Difference]: Start difference. First operand 5849 states and 8413 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:14:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:24,200 INFO L93 Difference]: Finished difference Result 6721 states and 9422 transitions. [2024-11-14 03:14:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:14:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2024-11-14 03:14:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:24,236 INFO L225 Difference]: With dead ends: 6721 [2024-11-14 03:14:24,236 INFO L226 Difference]: Without dead ends: 6006 [2024-11-14 03:14:24,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:14:24,243 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 364 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:24,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 742 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:14:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2024-11-14 03:14:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 5828. [2024-11-14 03:14:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5828 states, 4744 states have (on average 1.4133642495784149) internal successors, (6705), 4781 states have internal predecessors, (6705), 707 states have call successors, (707), 364 states have call predecessors, (707), 375 states have return successors, (988), 684 states have call predecessors, (988), 704 states have call successors, (988) [2024-11-14 03:14:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 8400 transitions. [2024-11-14 03:14:25,293 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 8400 transitions. Word has length 115 [2024-11-14 03:14:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:25,294 INFO L471 AbstractCegarLoop]: Abstraction has 5828 states and 8400 transitions. [2024-11-14 03:14:25,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:14:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 8400 transitions. [2024-11-14 03:14:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:14:25,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:25,305 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:25,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:14:25,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:25,510 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:25,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 270019613, now seen corresponding path program 1 times [2024-11-14 03:14:25,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:25,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285715750] [2024-11-14 03:14:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:14:26,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:14:26,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285715750] [2024-11-14 03:14:26,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285715750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:14:26,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445752037] [2024-11-14 03:14:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:26,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:26,604 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:26,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:14:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:14:26,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 03:14:26,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:14:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:14:28,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:14:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:14:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445752037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:14:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847659346] [2024-11-14 03:14:31,579 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 03:14:31,579 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:14:31,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:14:31,580 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:14:31,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:14:43,962 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 201 for LOIs [2024-11-14 03:14:44,111 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-14 03:14:44,135 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:14:44,138 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 165 for LOIs [2024-11-14 03:14:44,838 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 166 for LOIs [2024-11-14 03:14:45,502 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:14:45,526 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 159 for LOIs [2024-11-14 03:14:45,639 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 170 for LOIs [2024-11-14 03:14:45,768 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:15:01,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168266#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (exists ((v_~q_free~0_108 Int) (v_~q_req_up~0_109 Int)) (and (or (= ~p_dw_st~0 0) (exists ((v_~p_dw_pc~0_50 Int) (v_~p_dw_st~0_140 Int)) (and (or (and (= v_~p_dw_st~0_140 1) (= v_~p_dw_pc~0_50 0)) (and (<= ~q_buf_0~0 2147483647) (= v_~q_req_up~0_109 1) (= v_~p_dw_st~0_140 1) (<= 0 (+ ~q_buf_0~0 2147483648)))) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_50 1)) (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_50 0)))))) (or (and (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= v_~q_free~0_108 0)) (and (<= v_~q_free~0_108 1) (<= 0 ~p_dw_pc~0) (= ~p_dw_st~0 0))))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_44| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 0)))) (= ~c_dr_st~0 1))' at error location [2024-11-14 03:15:01,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:15:01,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:15:01,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 21] total 59 [2024-11-14 03:15:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665648697] [2024-11-14 03:15:01,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:15:01,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 03:15:01,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 03:15:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=11376, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 03:15:01,078 INFO L87 Difference]: Start difference. First operand 5828 states and 8400 transitions. Second operand has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:15:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:33,691 INFO L93 Difference]: Finished difference Result 9863 states and 13138 transitions. [2024-11-14 03:15:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2024-11-14 03:15:33,692 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 03:15:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:33,730 INFO L225 Difference]: With dead ends: 9863 [2024-11-14 03:15:33,730 INFO L226 Difference]: Without dead ends: 9172 [2024-11-14 03:15:33,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 362 SyntacticMatches, 3 SemanticMatches, 467 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 96044 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=22485, Invalid=197007, Unknown=0, NotChecked=0, Total=219492 [2024-11-14 03:15:33,765 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 8162 mSDsluCounter, 3706 mSDsCounter, 0 mSdLazyCounter, 8079 mSolverCounterSat, 4238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8165 SdHoareTripleChecker+Valid, 3923 SdHoareTripleChecker+Invalid, 12317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4238 IncrementalHoareTripleChecker+Valid, 8079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:33,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8165 Valid, 3923 Invalid, 12317 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4238 Valid, 8079 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-14 03:15:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9172 states. [2024-11-14 03:15:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9172 to 7338. [2024-11-14 03:15:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7338 states, 5803 states have (on average 1.3641220058590384) internal successors, (7916), 5852 states have internal predecessors, (7916), 934 states have call successors, (934), 552 states have call predecessors, (934), 599 states have return successors, (1271), 935 states have call predecessors, (1271), 931 states have call successors, (1271) [2024-11-14 03:15:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7338 states to 7338 states and 10121 transitions. [2024-11-14 03:15:34,974 INFO L78 Accepts]: Start accepts. Automaton has 7338 states and 10121 transitions. Word has length 124 [2024-11-14 03:15:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:34,975 INFO L471 AbstractCegarLoop]: Abstraction has 7338 states and 10121 transitions. [2024-11-14 03:15:34,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:15:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7338 states and 10121 transitions. [2024-11-14 03:15:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 03:15:34,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:34,985 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:35,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:35,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:35,186 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:35,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash 169413250, now seen corresponding path program 1 times [2024-11-14 03:15:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127303929] [2024-11-14 03:15:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:35,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:15:35,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127303929] [2024-11-14 03:15:35,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127303929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840171877] [2024-11-14 03:15:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:35,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:35,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:35,373 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:35,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:15:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:35,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:15:35,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:15:35,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 03:15:35,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840171877] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:35,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:15:35,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 03:15:35,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664521076] [2024-11-14 03:15:35,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:35,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:15:35,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:15:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:15:35,832 INFO L87 Difference]: Start difference. First operand 7338 states and 10121 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:15:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:37,213 INFO L93 Difference]: Finished difference Result 7780 states and 10613 transitions. [2024-11-14 03:15:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:15:37,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2024-11-14 03:15:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:37,242 INFO L225 Difference]: With dead ends: 7780 [2024-11-14 03:15:37,242 INFO L226 Difference]: Without dead ends: 5043 [2024-11-14 03:15:37,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:15:37,252 INFO L432 NwaCegarLoop]: 197 mSDtfsCounter, 534 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:37,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 650 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:15:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2024-11-14 03:15:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 5043. [2024-11-14 03:15:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5043 states, 4208 states have (on average 1.4496197718631179) internal successors, (6100), 4234 states have internal predecessors, (6100), 578 states have call successors, (578), 257 states have call predecessors, (578), 256 states have return successors, (832), 552 states have call predecessors, (832), 576 states have call successors, (832) [2024-11-14 03:15:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 7510 transitions. [2024-11-14 03:15:37,901 INFO L78 Accepts]: Start accepts. Automaton has 5043 states and 7510 transitions. Word has length 125 [2024-11-14 03:15:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:37,901 INFO L471 AbstractCegarLoop]: Abstraction has 5043 states and 7510 transitions. [2024-11-14 03:15:37,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:15:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5043 states and 7510 transitions. [2024-11-14 03:15:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-14 03:15:37,912 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:37,913 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:37,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 03:15:38,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:38,116 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:38,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1067579719, now seen corresponding path program 1 times [2024-11-14 03:15:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:38,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880591922] [2024-11-14 03:15:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:38,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:15:38,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:38,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880591922] [2024-11-14 03:15:38,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880591922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:38,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:38,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:15:38,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943847108] [2024-11-14 03:15:38,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:38,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:38,188 INFO L87 Difference]: Start difference. First operand 5043 states and 7510 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:15:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:39,630 INFO L93 Difference]: Finished difference Result 14940 states and 22667 transitions. [2024-11-14 03:15:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2024-11-14 03:15:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:39,687 INFO L225 Difference]: With dead ends: 14940 [2024-11-14 03:15:39,691 INFO L226 Difference]: Without dead ends: 9903 [2024-11-14 03:15:39,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:39,729 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 158 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:39,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 311 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9903 states. [2024-11-14 03:15:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9903 to 9843. [2024-11-14 03:15:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9843 states, 8220 states have (on average 1.4369829683698296) internal successors, (11812), 8270 states have internal predecessors, (11812), 1110 states have call successors, (1110), 513 states have call predecessors, (1110), 512 states have return successors, (1588), 1060 states have call predecessors, (1588), 1108 states have call successors, (1588) [2024-11-14 03:15:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9843 states to 9843 states and 14510 transitions. [2024-11-14 03:15:40,824 INFO L78 Accepts]: Start accepts. Automaton has 9843 states and 14510 transitions. Word has length 129 [2024-11-14 03:15:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:40,824 INFO L471 AbstractCegarLoop]: Abstraction has 9843 states and 14510 transitions. [2024-11-14 03:15:40,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:15:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9843 states and 14510 transitions. [2024-11-14 03:15:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-14 03:15:40,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:40,838 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:40,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-14 03:15:40,838 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:40,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 918835616, now seen corresponding path program 1 times [2024-11-14 03:15:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:40,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163087468] [2024-11-14 03:15:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:40,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 03:15:40,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:40,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163087468] [2024-11-14 03:15:40,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163087468] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:40,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:40,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:15:40,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245533109] [2024-11-14 03:15:40,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:40,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:40,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:40,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:40,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:40,906 INFO L87 Difference]: Start difference. First operand 9843 states and 14510 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:15:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:42,531 INFO L93 Difference]: Finished difference Result 29164 states and 43751 transitions. [2024-11-14 03:15:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:42,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2024-11-14 03:15:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:42,584 INFO L225 Difference]: With dead ends: 29164 [2024-11-14 03:15:42,584 INFO L226 Difference]: Without dead ends: 19327 [2024-11-14 03:15:42,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:42,615 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 161 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:42,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 325 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:15:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19327 states. [2024-11-14 03:15:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19327 to 19211. [2024-11-14 03:15:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19211 states, 16052 states have (on average 1.423623224520309) internal successors, (22852), 16150 states have internal predecessors, (22852), 2134 states have call successors, (2134), 1025 states have call predecessors, (2134), 1024 states have return successors, (3028), 2036 states have call predecessors, (3028), 2132 states have call successors, (3028) [2024-11-14 03:15:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19211 states to 19211 states and 28014 transitions. [2024-11-14 03:15:44,656 INFO L78 Accepts]: Start accepts. Automaton has 19211 states and 28014 transitions. Word has length 129 [2024-11-14 03:15:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:44,657 INFO L471 AbstractCegarLoop]: Abstraction has 19211 states and 28014 transitions. [2024-11-14 03:15:44,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:15:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 19211 states and 28014 transitions. [2024-11-14 03:15:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:15:44,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:44,702 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:44,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-14 03:15:44,703 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:44,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash 929452912, now seen corresponding path program 1 times [2024-11-14 03:15:44,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:44,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957601777] [2024-11-14 03:15:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:44,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:15:45,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:45,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957601777] [2024-11-14 03:15:45,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957601777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:45,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606412282] [2024-11-14 03:15:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:45,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:45,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:15:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:45,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:15:45,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:15:45,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-14 03:15:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606412282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:45,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200765546] [2024-11-14 03:15:45,951 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2024-11-14 03:15:45,951 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:45,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:45,952 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:45,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:16:03,129 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 145 for LOIs [2024-11-14 03:16:03,149 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 78 for LOIs [2024-11-14 03:16:03,186 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2024-11-14 03:16:03,200 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2024-11-14 03:16:03,201 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 114 for LOIs [2024-11-14 03:16:03,391 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2024-11-14 03:16:03,551 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 184 for LOIs [2024-11-14 03:16:03,742 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:16:18,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '304667#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= 1 |#StackHeapBarrier|) (not (= ~E_6~0 1)) (= 0 ~t5_pc~0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 2147483648)) (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 2147483647) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 0)))) (= ~p_last_write~0 0) (not (= ~T1_E~0 1)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t6_pc~0) (= 0 ~t3_pc~0) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| Int)) (and (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| 2147483648)) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| 0)))) (not (= ~T5_E~0 1)) (not (= ~E_2~0 1)) (= ~q_req_up~0 0) (not (= ~T3_E~0 1)) (not (= ~T2_E~0 1)) (exists ((|v_ULTIMATE.start_eval2_~tmp~5#1_17| Int)) (and (<= |v_ULTIMATE.start_eval2_~tmp~5#1_17| 1) (not (= |v_ULTIMATE.start_eval2_~tmp~5#1_17| 0)) (<= 0 |v_ULTIMATE.start_eval2_~tmp~5#1_17|))) (not (= ~E_3~0 1)) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= ~t6_i~0 1) (= ~p_dw_st~0 0) (not (= ~E_1~0 1)) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (not (= ~M_E~0 1)) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (not (= ~T4_E~0 1)) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= ~a_t~0 0) (= ~token~0 ~local~0) (not (= ~E_4~0 1)) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (not (= ~E_5~0 1)) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (not (= ~T6_E~0 1)) (not (= ~E_M~0 1)))' at error location [2024-11-14 03:16:18,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:16:18,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:16:18,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-14 03:16:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710254207] [2024-11-14 03:16:18,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:16:18,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:16:18,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:16:18,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=4382, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 03:16:18,499 INFO L87 Difference]: Start difference. First operand 19211 states and 28014 transitions. Second operand has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 03:16:25,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:25,928 INFO L93 Difference]: Finished difference Result 75915 states and 112830 transitions. [2024-11-14 03:16:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 03:16:25,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 149 [2024-11-14 03:16:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:26,095 INFO L225 Difference]: With dead ends: 75915 [2024-11-14 03:16:26,095 INFO L226 Difference]: Without dead ends: 56711 [2024-11-14 03:16:26,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 401 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1070, Invalid=9232, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 03:16:26,162 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 2518 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:26,162 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2518 Valid, 1030 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 03:16:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56711 states. [2024-11-14 03:16:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56711 to 50467. [2024-11-14 03:16:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 42524 states have (on average 1.391684695701251) internal successors, (59180), 42766 states have internal predecessors, (59180), 5110 states have call successors, (5110), 2833 states have call predecessors, (5110), 2832 states have return successors, (7444), 4868 states have call predecessors, (7444), 5108 states have call successors, (7444) [2024-11-14 03:16:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 71734 transitions. [2024-11-14 03:16:32,423 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 71734 transitions. Word has length 149 [2024-11-14 03:16:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:32,424 INFO L471 AbstractCegarLoop]: Abstraction has 50467 states and 71734 transitions. [2024-11-14 03:16:32,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 03:16:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 71734 transitions. [2024-11-14 03:16:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 03:16:32,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:32,521 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:32,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:16:32,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 03:16:32,722 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:32,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash 453333664, now seen corresponding path program 1 times [2024-11-14 03:16:32,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:32,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212563962] [2024-11-14 03:16:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:32,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-14 03:16:32,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212563962] [2024-11-14 03:16:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212563962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:32,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121896626] [2024-11-14 03:16:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:32,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:32,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:32,832 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:32,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:16:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:33,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:16:33,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:16:33,097 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:33,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121896626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:33,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:16:33,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:16:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586947131] [2024-11-14 03:16:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:33,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:16:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:33,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:16:33,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:16:33,099 INFO L87 Difference]: Start difference. First operand 50467 states and 71734 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:16:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:16:38,185 INFO L93 Difference]: Finished difference Result 98991 states and 141285 transitions. [2024-11-14 03:16:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:16:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 151 [2024-11-14 03:16:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:16:38,405 INFO L225 Difference]: With dead ends: 98991 [2024-11-14 03:16:38,406 INFO L226 Difference]: Without dead ends: 61731 [2024-11-14 03:16:38,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:16:38,530 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 151 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:16:38,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 219 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:16:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61731 states. [2024-11-14 03:16:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61731 to 60163. [2024-11-14 03:16:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60163 states, 51315 states have (on average 1.3629348143817597) internal successors, (69939), 51509 states have internal predecessors, (69939), 5368 states have call successors, (5368), 3475 states have call predecessors, (5368), 3479 states have return successors, (7821), 5179 states have call predecessors, (7821), 5366 states have call successors, (7821) [2024-11-14 03:16:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60163 states to 60163 states and 83128 transitions. [2024-11-14 03:16:43,911 INFO L78 Accepts]: Start accepts. Automaton has 60163 states and 83128 transitions. Word has length 151 [2024-11-14 03:16:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:16:43,912 INFO L471 AbstractCegarLoop]: Abstraction has 60163 states and 83128 transitions. [2024-11-14 03:16:43,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:16:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 60163 states and 83128 transitions. [2024-11-14 03:16:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 03:16:44,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:16:44,007 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:16:44,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:16:44,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 03:16:44,207 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:16:44,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:16:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 976654335, now seen corresponding path program 1 times [2024-11-14 03:16:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:16:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700588742] [2024-11-14 03:16:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:16:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 03:16:44,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:16:44,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700588742] [2024-11-14 03:16:44,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700588742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:16:44,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919769823] [2024-11-14 03:16:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:16:44,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:16:44,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:16:44,306 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:16:44,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a4adc3-b8e0-4211-a0e3-b7df43ae41fd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:16:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:16:44,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:16:44,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:16:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:16:44,503 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:16:44,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919769823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:16:44,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:16:44,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:16:44,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77435544] [2024-11-14 03:16:44,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:16:44,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:16:44,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:16:44,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:16:44,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:16:44,504 INFO L87 Difference]: Start difference. First operand 60163 states and 83128 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)