./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/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 dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:29:43,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:29:43,316 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:29:43,321 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:29:43,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:29:43,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:29:43,343 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:29:43,343 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:29:43,343 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:29:43,343 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:29:43,343 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:29:43,343 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:29:43,343 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:29:43,344 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:29:43,344 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:29:43,345 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:29:43,345 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:29:43,346 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:29:43,346 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:29:43,346 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:29:43,346 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:29:43,346 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:29:43,346 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:29:43,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:29:43,346 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:29:43,346 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:29:43,347 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:29:43,347 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:29:43,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:29:43,347 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:29:43,347 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:29:43,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:29:43,347 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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/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 -> dbdff9d5cdb7ffcae57151b3d045900600728670d8aad942a459f8d05b6221fb [2024-11-14 03:29:43,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:29:43,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:29:43,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:29:43,637 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:29:43,637 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:29:43,638 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c Unable to find full path for "g++" [2024-11-14 03:29:45,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:29:45,795 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:29:45,796 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2024-11-14 03:29:45,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/data/c959d8e39/0fae0eb0796a4b36b06c5109ebc560a9/FLAGae0cbb080 [2024-11-14 03:29:46,093 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/data/c959d8e39/0fae0eb0796a4b36b06c5109ebc560a9 [2024-11-14 03:29:46,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:29:46,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:29:46,099 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:29:46,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:29:46,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:29:46,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173c5a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46, skipping insertion in model container [2024-11-14 03:29:46,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,145 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:29:46,337 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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2024-11-14 03:29:46,411 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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2024-11-14 03:29:46,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:29:46,533 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:29:46,548 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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[914,927] [2024-11-14 03:29:46,572 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_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-2.c[7115,7128] [2024-11-14 03:29:46,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:29:46,648 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:29:46,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46 WrapperNode [2024-11-14 03:29:46,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:29:46,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:29:46,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:29:46,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:29:46,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,723 INFO L138 Inliner]: procedures = 73, calls = 87, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 931 [2024-11-14 03:29:46,723 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:29:46,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:29:46,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:29:46,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:29:46,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,766 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:29:46,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:29:46,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:29:46,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:29:46,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:29:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:46,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:29:46,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:29:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:29:46,846 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:29:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:29:46,847 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 03:29:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 03:29:46,847 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 03:29:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 03:29:46,847 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 03:29:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 03:29:46,847 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 03:29:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 03:29:46,847 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 03:29:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 03:29:46,847 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 03:29:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 03:29:46,848 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 03:29:46,848 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 03:29:46,848 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 03:29:46,848 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 03:29:46,848 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 03:29:46,848 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 03:29:46,848 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 03:29:46,848 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 03:29:46,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:29:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 03:29:46,851 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 03:29:46,851 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 03:29:46,851 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 03:29:46,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:29:46,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:29:46,851 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 03:29:46,851 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 03:29:47,037 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:29:47,040 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:29:48,240 INFO L? ?]: Removed 115 outVars from TransFormulas that were not future-live. [2024-11-14 03:29:48,241 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:29:48,924 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:29:48,925 INFO L316 CfgBuilder]: Removed 17 assume(true) statements. [2024-11-14 03:29:48,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:29:48 BoogieIcfgContainer [2024-11-14 03:29:48,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:29:48,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:29:48,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:29:48,935 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:29:48,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:29:46" (1/3) ... [2024-11-14 03:29:48,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df2be5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:29:48, skipping insertion in model container [2024-11-14 03:29:48,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46" (2/3) ... [2024-11-14 03:29:48,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df2be5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:29:48, skipping insertion in model container [2024-11-14 03:29:48,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:29:48" (3/3) ... [2024-11-14 03:29:48,938 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-2.c [2024-11-14 03:29:48,958 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:29:48,961 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.10.cil-2.c that has 15 procedures, 249 locations, 1 initial locations, 17 loop locations, and 2 error locations. [2024-11-14 03:29:49,047 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:29:49,063 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;@79afa37a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:29:49,064 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:29:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 249 states, 194 states have (on average 1.5051546391752577) internal successors, (292), 200 states have internal predecessors, (292), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-14 03:29:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:29:49,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:49,083 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 03:29:49,084 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:49,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash 582930060, now seen corresponding path program 1 times [2024-11-14 03:29:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:49,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964734501] [2024-11-14 03:29:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:49,585 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 03:29:49,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964734501] [2024-11-14 03:29:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964734501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:49,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:29:49,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:29:49,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311604108] [2024-11-14 03:29:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:49,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:29:49,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:29:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:29:49,630 INFO L87 Difference]: Start difference. First operand has 249 states, 194 states have (on average 1.5051546391752577) internal successors, (292), 200 states have internal predecessors, (292), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) 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 03:29:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:50,255 INFO L93 Difference]: Finished difference Result 549 states and 807 transitions. [2024-11-14 03:29:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:29:50,258 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 03:29:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:50,273 INFO L225 Difference]: With dead ends: 549 [2024-11-14 03:29:50,273 INFO L226 Difference]: Without dead ends: 304 [2024-11-14 03:29:50,281 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 03:29:50,287 INFO L432 NwaCegarLoop]: 354 mSDtfsCounter, 416 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:50,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 614 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:29:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-14 03:29:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 297. [2024-11-14 03:29:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 229 states have (on average 1.4192139737991267) internal successors, (325), 233 states have internal predecessors, (325), 46 states have call successors, (46), 21 states have call predecessors, (46), 20 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-14 03:29:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 415 transitions. [2024-11-14 03:29:50,386 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 415 transitions. Word has length 45 [2024-11-14 03:29:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:50,388 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 415 transitions. [2024-11-14 03:29:50,388 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 03:29:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 415 transitions. [2024-11-14 03:29:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 03:29:50,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:50,391 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 03:29:50,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:29:50,392 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:50,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1501904683, now seen corresponding path program 1 times [2024-11-14 03:29:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:50,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651887002] [2024-11-14 03:29:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:50,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:50,865 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 03:29:50,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:50,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651887002] [2024-11-14 03:29:50,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651887002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:50,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:29:50,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 03:29:50,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033677953] [2024-11-14 03:29:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:50,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:29:50,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:50,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:29:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:29:50,869 INFO L87 Difference]: Start difference. First operand 297 states and 415 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 03:29:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:52,055 INFO L93 Difference]: Finished difference Result 478 states and 636 transitions. [2024-11-14 03:29:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:29:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2024-11-14 03:29:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:52,061 INFO L225 Difference]: With dead ends: 478 [2024-11-14 03:29:52,061 INFO L226 Difference]: Without dead ends: 362 [2024-11-14 03:29:52,062 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 03:29:52,063 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 504 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:52,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1069 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:29:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-14 03:29:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 349. [2024-11-14 03:29:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 266 states have (on average 1.3984962406015038) internal successors, (372), 270 states have internal predecessors, (372), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-14 03:29:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 478 transitions. [2024-11-14 03:29:52,102 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 478 transitions. Word has length 45 [2024-11-14 03:29:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:52,103 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 478 transitions. [2024-11-14 03:29:52,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-14 03:29:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 478 transitions. [2024-11-14 03:29:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:29:52,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:52,108 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 03:29:52,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:29:52,109 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:52,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1356297845, now seen corresponding path program 1 times [2024-11-14 03:29:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:52,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27012598] [2024-11-14 03:29:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:52,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:52,218 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 03:29:52,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:52,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27012598] [2024-11-14 03:29:52,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27012598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:52,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:29:52,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:29:52,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893504433] [2024-11-14 03:29:52,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:52,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:52,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:52,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:29:52,220 INFO L87 Difference]: Start difference. First operand 349 states and 478 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:29:52,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:52,394 INFO L93 Difference]: Finished difference Result 677 states and 884 transitions. [2024-11-14 03:29:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:52,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-11-14 03:29:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:52,399 INFO L225 Difference]: With dead ends: 677 [2024-11-14 03:29:52,399 INFO L226 Difference]: Without dead ends: 508 [2024-11-14 03:29:52,400 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 03:29:52,405 INFO L432 NwaCegarLoop]: 294 mSDtfsCounter, 327 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:52,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 356 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:29:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-11-14 03:29:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 489. [2024-11-14 03:29:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 361 states have (on average 1.335180055401662) internal successors, (482), 365 states have internal predecessors, (482), 78 states have call successors, (78), 49 states have call predecessors, (78), 48 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-11-14 03:29:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 636 transitions. [2024-11-14 03:29:52,480 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 636 transitions. Word has length 46 [2024-11-14 03:29:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:52,481 INFO L471 AbstractCegarLoop]: Abstraction has 489 states and 636 transitions. [2024-11-14 03:29:52,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:29:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 636 transitions. [2024-11-14 03:29:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:29:52,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:52,486 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 03:29:52,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:29:52,486 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:52,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:52,487 INFO L85 PathProgramCache]: Analyzing trace with hash -210557588, now seen corresponding path program 1 times [2024-11-14 03:29:52,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:52,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397203860] [2024-11-14 03:29:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:52,587 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 03:29:52,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:52,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397203860] [2024-11-14 03:29:52,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397203860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:52,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:29:52,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:29:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065185510] [2024-11-14 03:29:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:52,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:29:52,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:52,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:29:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:29:52,589 INFO L87 Difference]: Start difference. First operand 489 states and 636 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 03:29:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:52,787 INFO L93 Difference]: Finished difference Result 859 states and 1081 transitions. [2024-11-14 03:29:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:29:52,787 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 03:29:52,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:52,791 INFO L225 Difference]: With dead ends: 859 [2024-11-14 03:29:52,791 INFO L226 Difference]: Without dead ends: 596 [2024-11-14 03:29:52,792 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 03:29:52,793 INFO L432 NwaCegarLoop]: 301 mSDtfsCounter, 67 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:52,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 573 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:29:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2024-11-14 03:29:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2024-11-14 03:29:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 432 states have (on average 1.3194444444444444) internal successors, (570), 436 states have internal predecessors, (570), 94 states have call successors, (94), 63 states have call predecessors, (94), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-14 03:29:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 756 transitions. [2024-11-14 03:29:52,879 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 756 transitions. Word has length 47 [2024-11-14 03:29:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:52,879 INFO L471 AbstractCegarLoop]: Abstraction has 590 states and 756 transitions. [2024-11-14 03:29:52,879 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 03:29:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 756 transitions. [2024-11-14 03:29:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 03:29:52,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:52,884 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 03:29:52,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:29:52,884 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:52,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash -372942999, now seen corresponding path program 1 times [2024-11-14 03:29:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921813142] [2024-11-14 03:29:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:53,048 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 03:29:53,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921813142] [2024-11-14 03:29:53,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921813142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:29:53,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:29:53,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:29:53,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488002374] [2024-11-14 03:29:53,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:29:53,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:29:53,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:29:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:29:53,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:29:53,050 INFO L87 Difference]: Start difference. First operand 590 states and 756 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 03:29:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:29:53,450 INFO L93 Difference]: Finished difference Result 697 states and 882 transitions. [2024-11-14 03:29:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:29:53,450 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 03:29:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:29:53,455 INFO L225 Difference]: With dead ends: 697 [2024-11-14 03:29:53,455 INFO L226 Difference]: Without dead ends: 694 [2024-11-14 03:29:53,455 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 03:29:53,456 INFO L432 NwaCegarLoop]: 298 mSDtfsCounter, 590 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:29:53,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 339 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:29:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2024-11-14 03:29:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 589. [2024-11-14 03:29:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 432 states have (on average 1.3125) internal successors, (567), 435 states have internal predecessors, (567), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-14 03:29:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 752 transitions. [2024-11-14 03:29:53,550 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 752 transitions. Word has length 54 [2024-11-14 03:29:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:29:53,551 INFO L471 AbstractCegarLoop]: Abstraction has 589 states and 752 transitions. [2024-11-14 03:29:53,551 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 03:29:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 752 transitions. [2024-11-14 03:29:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 03:29:53,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:29:53,553 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 03:29:53,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:29:53,553 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:29:53,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:29:53,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1322383796, now seen corresponding path program 1 times [2024-11-14 03:29:53,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:29:53,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488228517] [2024-11-14 03:29:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:53,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:29:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:53,785 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 03:29:53,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:29:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488228517] [2024-11-14 03:29:53,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488228517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:29:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387361718] [2024-11-14 03:29:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:29:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:29:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:53,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:29:53,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:29:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:29:53,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:29:53,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:29:54,293 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 03:29:54,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:29:54,423 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 03:29:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387361718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:29:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119542184] [2024-11-14 03:29:54,452 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 03:29:54,453 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:29:54,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:29:54,461 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:29:54,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:30:01,044 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 191 for LOIs [2024-11-14 03:30:01,104 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 187 for LOIs [2024-11-14 03:30:01,166 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 195 for LOIs [2024-11-14 03:30:02,099 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 191 for LOIs [2024-11-14 03:30:02,319 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 191 for LOIs [2024-11-14 03:30:02,513 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 191 for LOIs [2024-11-14 03:30:02,593 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 198 for LOIs [2024-11-14 03:30:02,664 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:30:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1119542184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:23,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:30:23,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 03:30:23,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425950529] [2024-11-14 03:30:23,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:23,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 03:30:23,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 03:30:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:30:23,914 INFO L87 Difference]: Start difference. First operand 589 states and 752 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 03:30:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:39,787 INFO L93 Difference]: Finished difference Result 1024 states and 1267 transitions. [2024-11-14 03:30:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:30:39,788 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 03:30:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:39,792 INFO L225 Difference]: With dead ends: 1024 [2024-11-14 03:30:39,792 INFO L226 Difference]: Without dead ends: 616 [2024-11-14 03:30:39,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:30:39,794 INFO L432 NwaCegarLoop]: 279 mSDtfsCounter, 182 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:39,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1439 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-14 03:30:39,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2024-11-14 03:30:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 608. [2024-11-14 03:30:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 449 states have (on average 1.3073496659242763) internal successors, (587), 452 states have internal predecessors, (587), 94 states have call successors, (94), 64 states have call predecessors, (94), 63 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2024-11-14 03:30:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 774 transitions. [2024-11-14 03:30:39,904 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 774 transitions. Word has length 55 [2024-11-14 03:30:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:39,905 INFO L471 AbstractCegarLoop]: Abstraction has 608 states and 774 transitions. [2024-11-14 03:30:39,905 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 03:30:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 774 transitions. [2024-11-14 03:30:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 03:30:39,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:39,907 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 03:30:39,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:30:40,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:40,108 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:40,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash -240205856, now seen corresponding path program 1 times [2024-11-14 03:30:40,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:40,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610504101] [2024-11-14 03:30:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:40,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:40,187 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 03:30:40,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610504101] [2024-11-14 03:30:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610504101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:40,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:40,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:40,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154887282] [2024-11-14 03:30:40,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:40,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:40,189 INFO L87 Difference]: Start difference. First operand 608 states and 774 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 03:30:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:40,415 INFO L93 Difference]: Finished difference Result 1055 states and 1310 transitions. [2024-11-14 03:30:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:40,415 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 03:30:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:40,420 INFO L225 Difference]: With dead ends: 1055 [2024-11-14 03:30:40,421 INFO L226 Difference]: Without dead ends: 789 [2024-11-14 03:30:40,422 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 03:30:40,422 INFO L432 NwaCegarLoop]: 326 mSDtfsCounter, 43 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:40,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 615 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:30:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2024-11-14 03:30:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 660. [2024-11-14 03:30:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 491 states have (on average 1.3034623217922607) internal successors, (640), 494 states have internal predecessors, (640), 99 states have call successors, (99), 69 states have call predecessors, (99), 68 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-11-14 03:30:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 837 transitions. [2024-11-14 03:30:40,524 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 837 transitions. Word has length 61 [2024-11-14 03:30:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:40,524 INFO L471 AbstractCegarLoop]: Abstraction has 660 states and 837 transitions. [2024-11-14 03:30:40,524 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 03:30:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 837 transitions. [2024-11-14 03:30:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 03:30:40,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:40,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:40,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:30:40,526 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:40,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:40,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1881168040, now seen corresponding path program 1 times [2024-11-14 03:30:40,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:40,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886770105] [2024-11-14 03:30:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:40,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:40,651 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 03:30:40,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:40,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886770105] [2024-11-14 03:30:40,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886770105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:40,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:40,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:30:40,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733945882] [2024-11-14 03:30:40,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:40,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:30:40,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:30:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:30:40,653 INFO L87 Difference]: Start difference. First operand 660 states and 837 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:30:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:41,587 INFO L93 Difference]: Finished difference Result 1483 states and 2157 transitions. [2024-11-14 03:30:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:30:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2024-11-14 03:30:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:41,600 INFO L225 Difference]: With dead ends: 1483 [2024-11-14 03:30:41,600 INFO L226 Difference]: Without dead ends: 1313 [2024-11-14 03:30:41,606 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 03:30:41,607 INFO L432 NwaCegarLoop]: 482 mSDtfsCounter, 1319 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:41,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 1240 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:30:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2024-11-14 03:30:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1302. [2024-11-14 03:30:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1032 states have (on average 1.3934108527131783) internal successors, (1438), 1038 states have internal predecessors, (1438), 176 states have call successors, (176), 93 states have call predecessors, (176), 92 states have return successors, (229), 172 states have call predecessors, (229), 175 states have call successors, (229) [2024-11-14 03:30:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1843 transitions. [2024-11-14 03:30:41,790 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1843 transitions. Word has length 61 [2024-11-14 03:30:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:41,791 INFO L471 AbstractCegarLoop]: Abstraction has 1302 states and 1843 transitions. [2024-11-14 03:30:41,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:30:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1843 transitions. [2024-11-14 03:30:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 03:30:41,794 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:41,794 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] [2024-11-14 03:30:41,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:30:41,794 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:41,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1726504986, now seen corresponding path program 1 times [2024-11-14 03:30:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:41,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361477760] [2024-11-14 03:30:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:41,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:30:42,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:42,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361477760] [2024-11-14 03:30:42,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361477760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182158547] [2024-11-14 03:30:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:42,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:42,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:42,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:30:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:42,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:30:42,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:30:42,417 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:42,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182158547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:42,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:42,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2024-11-14 03:30:42,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579862664] [2024-11-14 03:30:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:42,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:42,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:30:42,418 INFO L87 Difference]: Start difference. First operand 1302 states and 1843 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 03:30:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:42,674 INFO L93 Difference]: Finished difference Result 1635 states and 2252 transitions. [2024-11-14 03:30:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 03:30:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:42,682 INFO L225 Difference]: With dead ends: 1635 [2024-11-14 03:30:42,682 INFO L226 Difference]: Without dead ends: 1317 [2024-11-14 03:30:42,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:30:42,686 INFO L432 NwaCegarLoop]: 331 mSDtfsCounter, 46 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:42,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 616 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:30:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2024-11-14 03:30:42,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1192. [2024-11-14 03:30:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 956 states have (on average 1.3922594142259415) internal successors, (1331), 962 states have internal predecessors, (1331), 158 states have call successors, (158), 77 states have call predecessors, (158), 76 states have return successors, (211), 154 states have call predecessors, (211), 157 states have call successors, (211) [2024-11-14 03:30:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1700 transitions. [2024-11-14 03:30:42,843 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1700 transitions. Word has length 102 [2024-11-14 03:30:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:42,844 INFO L471 AbstractCegarLoop]: Abstraction has 1192 states and 1700 transitions. [2024-11-14 03:30:42,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 03:30:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1700 transitions. [2024-11-14 03:30:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 03:30:42,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:42,846 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 03:30:42,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:30:43,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:43,051 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:43,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:43,051 INFO L85 PathProgramCache]: Analyzing trace with hash -149947227, now seen corresponding path program 1 times [2024-11-14 03:30:43,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:43,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092275853] [2024-11-14 03:30:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:43,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:43,486 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 03:30:43,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:43,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092275853] [2024-11-14 03:30:43,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092275853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:43,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807995194] [2024-11-14 03:30:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:43,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:43,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:43,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:43,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:30:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:43,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:30:43,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:43,730 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 03:30:43,730 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:43,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807995194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:43,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:43,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 03:30:43,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516132542] [2024-11-14 03:30:43,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:43,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:30:43,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:30:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:30:43,734 INFO L87 Difference]: Start difference. First operand 1192 states and 1700 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 03:30:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:44,194 INFO L93 Difference]: Finished difference Result 1452 states and 2000 transitions. [2024-11-14 03:30:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:30:44,195 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 03:30:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:44,202 INFO L225 Difference]: With dead ends: 1452 [2024-11-14 03:30:44,202 INFO L226 Difference]: Without dead ends: 1083 [2024-11-14 03:30:44,204 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 03:30:44,204 INFO L432 NwaCegarLoop]: 305 mSDtfsCounter, 278 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:44,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1222 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:30:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2024-11-14 03:30:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1079. [2024-11-14 03:30:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 881 states have (on average 1.4108967082860386) internal successors, (1243), 887 states have internal predecessors, (1243), 137 states have call successors, (137), 60 states have call predecessors, (137), 59 states have return successors, (190), 133 states have call predecessors, (190), 136 states have call successors, (190) [2024-11-14 03:30:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1570 transitions. [2024-11-14 03:30:44,339 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1570 transitions. Word has length 102 [2024-11-14 03:30:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:44,339 INFO L471 AbstractCegarLoop]: Abstraction has 1079 states and 1570 transitions. [2024-11-14 03:30:44,340 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 03:30:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1570 transitions. [2024-11-14 03:30:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 03:30:44,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:44,342 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 03:30:44,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:44,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:30:44,547 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:44,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:44,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2078241426, now seen corresponding path program 1 times [2024-11-14 03:30:44,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:44,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927996272] [2024-11-14 03:30:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:44,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:44,762 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 03:30:44,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:44,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927996272] [2024-11-14 03:30:44,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927996272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:44,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316119737] [2024-11-14 03:30:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:44,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:44,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:44,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:44,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:30:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:44,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:30:44,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:45,275 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 03:30:45,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:30:45,423 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 03:30:45,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316119737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:30:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199388487] [2024-11-14 03:30:45,426 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 03:30:45,426 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:30:45,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:30:45,427 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:30:45,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:31:06,648 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 229 for LOIs [2024-11-14 03:31:07,076 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 193 for LOIs [2024-11-14 03:31:07,461 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 150 for LOIs [2024-11-14 03:31:07,504 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 214 for LOIs [2024-11-14 03:31:10,315 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2024-11-14 03:31:12,867 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 164 for LOIs [2024-11-14 03:31:13,037 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 208 for LOIs [2024-11-14 03:31:13,388 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2024-11-14 03:31:13,872 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:03,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25655#(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)) (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) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 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) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~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) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 03:32:03,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:03,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:03,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 03:32:03,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078470060] [2024-11-14 03:32:03,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:03,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:32:03,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:32:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 03:32:03,879 INFO L87 Difference]: Start difference. First operand 1079 states and 1570 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 03:32:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:07,882 INFO L93 Difference]: Finished difference Result 2019 states and 2657 transitions. [2024-11-14 03:32:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 03:32:07,883 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 03:32:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:07,892 INFO L225 Difference]: With dead ends: 2019 [2024-11-14 03:32:07,893 INFO L226 Difference]: Without dead ends: 1837 [2024-11-14 03:32:07,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 03:32:07,898 INFO L432 NwaCegarLoop]: 277 mSDtfsCounter, 1151 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:07,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 2140 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:32:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2024-11-14 03:32:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1474. [2024-11-14 03:32:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1166 states have (on average 1.353344768439108) internal successors, (1578), 1172 states have internal predecessors, (1578), 195 states have call successors, (195), 112 states have call predecessors, (195), 111 states have return successors, (248), 191 states have call predecessors, (248), 194 states have call successors, (248) [2024-11-14 03:32:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2021 transitions. [2024-11-14 03:32:08,107 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2021 transitions. Word has length 104 [2024-11-14 03:32:08,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:08,107 INFO L471 AbstractCegarLoop]: Abstraction has 1474 states and 2021 transitions. [2024-11-14 03:32:08,108 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 03:32:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2021 transitions. [2024-11-14 03:32:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 03:32:08,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:08,111 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 03:32:08,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:32:08,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:32:08,312 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:08,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1818822246, now seen corresponding path program 1 times [2024-11-14 03:32:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555358771] [2024-11-14 03:32:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:08,373 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 03:32:08,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555358771] [2024-11-14 03:32:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555358771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:32:08,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:32:08,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:32:08,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427879706] [2024-11-14 03:32:08,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:32:08,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:32:08,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:08,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:32:08,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:32:08,377 INFO L87 Difference]: Start difference. First operand 1474 states and 2021 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 03:32:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:08,679 INFO L93 Difference]: Finished difference Result 1973 states and 2593 transitions. [2024-11-14 03:32:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:32:08,680 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 03:32:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:08,691 INFO L225 Difference]: With dead ends: 1973 [2024-11-14 03:32:08,691 INFO L226 Difference]: Without dead ends: 1464 [2024-11-14 03:32:08,693 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 03:32:08,694 INFO L432 NwaCegarLoop]: 329 mSDtfsCounter, 324 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:08,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 395 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2024-11-14 03:32:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1455. [2024-11-14 03:32:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1149 states have (on average 1.3455178416013924) internal successors, (1546), 1155 states have internal predecessors, (1546), 194 states have call successors, (194), 111 states have call predecessors, (194), 110 states have return successors, (247), 190 states have call predecessors, (247), 193 states have call successors, (247) [2024-11-14 03:32:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 1987 transitions. [2024-11-14 03:32:08,906 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 1987 transitions. Word has length 108 [2024-11-14 03:32:08,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:08,907 INFO L471 AbstractCegarLoop]: Abstraction has 1455 states and 1987 transitions. [2024-11-14 03:32:08,907 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 03:32:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 1987 transitions. [2024-11-14 03:32:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 03:32:08,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:08,910 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 03:32:08,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:32:08,910 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:08,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:08,911 INFO L85 PathProgramCache]: Analyzing trace with hash 831766994, now seen corresponding path program 1 times [2024-11-14 03:32:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:08,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108856800] [2024-11-14 03:32:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:09,079 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 03:32:09,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108856800] [2024-11-14 03:32:09,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108856800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596735632] [2024-11-14 03:32:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:09,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:09,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:09,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:32:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:09,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:32:09,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:09,309 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 03:32:09,309 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:32:09,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596735632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:32:09,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:32:09,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 03:32:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137697712] [2024-11-14 03:32:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:32:09,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:32:09,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:32:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:32:09,311 INFO L87 Difference]: Start difference. First operand 1455 states and 1987 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 03:32:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:09,800 INFO L93 Difference]: Finished difference Result 1975 states and 2581 transitions. [2024-11-14 03:32:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:32:09,801 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 03:32:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:09,810 INFO L225 Difference]: With dead ends: 1975 [2024-11-14 03:32:09,810 INFO L226 Difference]: Without dead ends: 1426 [2024-11-14 03:32:09,812 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 03:32:09,812 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 44 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:09,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1532 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:32:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2024-11-14 03:32:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1366. [2024-11-14 03:32:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1088 states have (on average 1.3566176470588236) internal successors, (1476), 1094 states have internal predecessors, (1476), 179 states have call successors, (179), 98 states have call predecessors, (179), 97 states have return successors, (232), 175 states have call predecessors, (232), 178 states have call successors, (232) [2024-11-14 03:32:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1887 transitions. [2024-11-14 03:32:10,009 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1887 transitions. Word has length 112 [2024-11-14 03:32:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:10,009 INFO L471 AbstractCegarLoop]: Abstraction has 1366 states and 1887 transitions. [2024-11-14 03:32:10,009 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 03:32:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1887 transitions. [2024-11-14 03:32:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 03:32:10,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:10,013 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 03:32:10,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:32:10,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:10,214 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:10,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash 623542742, now seen corresponding path program 1 times [2024-11-14 03:32:10,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374041357] [2024-11-14 03:32:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:10,353 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 03:32:10,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:10,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374041357] [2024-11-14 03:32:10,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374041357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:32:10,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:32:10,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:32:10,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449284562] [2024-11-14 03:32:10,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:32:10,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:32:10,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:10,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:32:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:32:10,356 INFO L87 Difference]: Start difference. First operand 1366 states and 1887 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 03:32:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:10,830 INFO L93 Difference]: Finished difference Result 2115 states and 2732 transitions. [2024-11-14 03:32:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:32:10,831 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 03:32:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:10,840 INFO L225 Difference]: With dead ends: 2115 [2024-11-14 03:32:10,840 INFO L226 Difference]: Without dead ends: 1658 [2024-11-14 03:32:10,842 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 03:32:10,842 INFO L432 NwaCegarLoop]: 323 mSDtfsCounter, 313 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:10,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1352 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:32:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2024-11-14 03:32:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1624. [2024-11-14 03:32:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1250 states have (on average 1.3248) internal successors, (1656), 1262 states have internal predecessors, (1656), 227 states have call successors, (227), 140 states have call predecessors, (227), 145 states have return successors, (292), 223 states have call predecessors, (292), 226 states have call successors, (292) [2024-11-14 03:32:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2175 transitions. [2024-11-14 03:32:11,100 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2175 transitions. Word has length 113 [2024-11-14 03:32:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:11,100 INFO L471 AbstractCegarLoop]: Abstraction has 1624 states and 2175 transitions. [2024-11-14 03:32:11,100 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 03:32:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2175 transitions. [2024-11-14 03:32:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 03:32:11,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:11,103 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 03:32:11,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 03:32:11,103 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:11,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1423406930, now seen corresponding path program 1 times [2024-11-14 03:32:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:11,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322938989] [2024-11-14 03:32:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:32:12,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:12,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322938989] [2024-11-14 03:32:12,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322938989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:12,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335665600] [2024-11-14 03:32:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:12,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:12,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:12,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:12,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:32:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:12,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 03:32:12,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:32:13,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 03:32:15,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335665600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:15,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147493325] [2024-11-14 03:32:15,825 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 03:32:15,826 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:15,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:15,826 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:15,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:50,776 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 240 for LOIs [2024-11-14 03:32:51,052 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 03:32:51,054 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:32:51,056 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2024-11-14 03:32:52,345 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2024-11-14 03:32:53,476 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:32:53,501 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 198 for LOIs [2024-11-14 03:32:53,696 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 209 for LOIs [2024-11-14 03:32:53,916 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:33:11,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46220#(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 03:33:11,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:33:11,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:33:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 22] total 63 [2024-11-14 03:33:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658628283] [2024-11-14 03:33:11,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:33:11,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-14 03:33:11,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:33:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-14 03:33:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1033, Invalid=11399, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 03:33:11,006 INFO L87 Difference]: Start difference. First operand 1624 states and 2175 transitions. Second operand has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-14 03:33:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:33:42,383 INFO L93 Difference]: Finished difference Result 5359 states and 6789 transitions. [2024-11-14 03:33:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 364 states. [2024-11-14 03:33:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) Word has length 114 [2024-11-14 03:33:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:33:42,405 INFO L225 Difference]: With dead ends: 5359 [2024-11-14 03:33:42,405 INFO L226 Difference]: Without dead ends: 4644 [2024-11-14 03:33:42,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 296 SyntacticMatches, 7 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 93369 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=21001, Invalid=202255, Unknown=0, NotChecked=0, Total=223256 [2024-11-14 03:33:42,441 INFO L432 NwaCegarLoop]: 332 mSDtfsCounter, 7214 mSDsluCounter, 7275 mSDsCounter, 0 mSdLazyCounter, 10982 mSolverCounterSat, 3134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7214 SdHoareTripleChecker+Valid, 7607 SdHoareTripleChecker+Invalid, 14116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3134 IncrementalHoareTripleChecker+Valid, 10982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:33:42,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7214 Valid, 7607 Invalid, 14116 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3134 Valid, 10982 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-14 03:33:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2024-11-14 03:33:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 2130. [2024-11-14 03:33:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 1604 states have (on average 1.2861596009975063) internal successors, (2063), 1618 states have internal predecessors, (2063), 299 states have call successors, (299), 198 states have call predecessors, (299), 225 states have return successors, (392), 315 states have call predecessors, (392), 298 states have call successors, (392) [2024-11-14 03:33:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2754 transitions. [2024-11-14 03:33:43,065 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2754 transitions. Word has length 114 [2024-11-14 03:33:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:33:43,066 INFO L471 AbstractCegarLoop]: Abstraction has 2130 states and 2754 transitions. [2024-11-14 03:33:43,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 40 states have (on average 4.9) internal successors, (196), 45 states have internal predecessors, (196), 25 states have call successors, (44), 19 states have call predecessors, (44), 25 states have return successors, (46), 23 states have call predecessors, (46), 25 states have call successors, (46) [2024-11-14 03:33:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2754 transitions. [2024-11-14 03:33:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 03:33:43,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:33:43,069 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 03:33:43,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:33:43,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:33:43,274 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:33:43,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:33:43,274 INFO L85 PathProgramCache]: Analyzing trace with hash 113535437, now seen corresponding path program 1 times [2024-11-14 03:33:43,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:33:43,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499853018] [2024-11-14 03:33:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:33:43,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:33:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:33:43,630 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 03:33:43,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:33:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499853018] [2024-11-14 03:33:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499853018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:33:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707648202] [2024-11-14 03:33:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:33:43,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:33:43,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:33:43,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:33:43,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:33:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:33:43,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:33:43,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:33:43,882 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 03:33:43,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:33:44,082 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 03:33:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707648202] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:33:44,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:33:44,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 03:33:44,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769088155] [2024-11-14 03:33:44,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:33:44,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:33:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:33:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:33:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:33:44,084 INFO L87 Difference]: Start difference. First operand 2130 states and 2754 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 03:33:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:33:45,375 INFO L93 Difference]: Finished difference Result 3714 states and 4608 transitions. [2024-11-14 03:33:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:33:45,376 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 03:33:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:33:45,390 INFO L225 Difference]: With dead ends: 3714 [2024-11-14 03:33:45,390 INFO L226 Difference]: Without dead ends: 2493 [2024-11-14 03:33:45,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:33:45,395 INFO L432 NwaCegarLoop]: 251 mSDtfsCounter, 465 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:33:45,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 872 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:33:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2024-11-14 03:33:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2172. [2024-11-14 03:33:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 1625 states have (on average 1.2849230769230768) internal successors, (2088), 1639 states have internal predecessors, (2088), 314 states have call successors, (314), 203 states have call predecessors, (314), 231 states have return successors, (420), 331 states have call predecessors, (420), 313 states have call successors, (420) [2024-11-14 03:33:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 2822 transitions. [2024-11-14 03:33:46,040 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 2822 transitions. Word has length 115 [2024-11-14 03:33:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:33:46,041 INFO L471 AbstractCegarLoop]: Abstraction has 2172 states and 2822 transitions. [2024-11-14 03:33:46,041 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 03:33:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 2822 transitions. [2024-11-14 03:33:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:33:46,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:33:46,046 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 03:33:46,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:33:46,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:33:46,251 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:33:46,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:33:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash 744006302, now seen corresponding path program 1 times [2024-11-14 03:33:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:33:46,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988807274] [2024-11-14 03:33:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:33:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:33:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:33:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:33:46,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:33:46,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988807274] [2024-11-14 03:33:46,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988807274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:33:46,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522379227] [2024-11-14 03:33:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:33:46,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:33:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:33:46,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:33:46,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:33:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:33:47,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:33:47,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:33:47,923 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 03:33:47,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:33:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:33:49,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522379227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:33:49,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345392143] [2024-11-14 03:33:49,367 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 03:33:49,367 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:33:49,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:33:49,367 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:33:49,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:34:08,752 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 241 for LOIs [2024-11-14 03:34:08,985 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-14 03:34:09,009 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 03:34:09,011 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 205 for LOIs [2024-11-14 03:34:10,218 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 206 for LOIs [2024-11-14 03:34:11,332 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 03:34:11,357 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 199 for LOIs [2024-11-14 03:34:11,549 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 210 for LOIs [2024-11-14 03:34:11,758 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:34:29,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67728#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((v_~q_free~0_105 Int) (v_~q_req_up~0_104 Int)) (and (or (exists ((v_~p_dw_st~0_141 Int) (v_~p_dw_pc~0_49 Int)) (and (or (and (= v_~p_dw_pc~0_49 0) (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))))) (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_49 1))) (or (and (= v_~p_dw_pc~0_49 0) (= v_~p_dw_st~0_141 1)) (and (<= ~q_buf_0~0 2147483647) (= v_~q_req_up~0_104 1) (<= 0 (+ ~p_last_write~0 2147483648)) (= v_~p_dw_st~0_141 1))))) (= ~p_dw_st~0 0)) (or (and (<= 0 ~p_dw_pc~0) (<= v_~q_free~0_105 1) (= ~p_dw_st~0 0)) (and (= v_~q_free~0_105 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~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 03:34:29,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:34:29,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:34:29,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-14 03:34:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416108798] [2024-11-14 03:34:29,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:34:29,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 03:34:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 03:34:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 03:34:29,465 INFO L87 Difference]: Start difference. First operand 2172 states and 2822 transitions. Second operand has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:34:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:38,147 INFO L93 Difference]: Finished difference Result 4766 states and 5856 transitions. [2024-11-14 03:34:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-14 03:34:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 03:34:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:34:38,164 INFO L225 Difference]: With dead ends: 4766 [2024-11-14 03:34:38,164 INFO L226 Difference]: Without dead ends: 3503 [2024-11-14 03:34:38,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 15908 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=4266, Invalid=36740, Unknown=0, NotChecked=0, Total=41006 [2024-11-14 03:34:38,173 INFO L432 NwaCegarLoop]: 251 mSDtfsCounter, 5793 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 5694 mSolverCounterSat, 2671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5793 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 8365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2671 IncrementalHoareTripleChecker+Valid, 5694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:34:38,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5793 Valid, 3392 Invalid, 8365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2671 Valid, 5694 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-14 03:34:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2024-11-14 03:34:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 1963. [2024-11-14 03:34:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1496 states have (on average 1.2974598930481283) internal successors, (1941), 1512 states have internal predecessors, (1941), 269 states have call successors, (269), 168 states have call predecessors, (269), 196 states have return successors, (364), 284 states have call predecessors, (364), 268 states have call successors, (364) [2024-11-14 03:34:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2574 transitions. [2024-11-14 03:34:38,722 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2574 transitions. Word has length 124 [2024-11-14 03:34:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:34:38,723 INFO L471 AbstractCegarLoop]: Abstraction has 1963 states and 2574 transitions. [2024-11-14 03:34:38,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 03:34:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2574 transitions. [2024-11-14 03:34:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 03:34:38,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:34:38,727 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 03:34:38,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:34:38,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:34:38,928 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:34:38,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:34:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2061969197, now seen corresponding path program 1 times [2024-11-14 03:34:38,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:34:38,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948971717] [2024-11-14 03:34:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:34:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:39,104 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 03:34:39,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:34:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948971717] [2024-11-14 03:34:39,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948971717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:34:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971303179] [2024-11-14 03:34:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:39,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:34:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:34:39,107 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:34:39,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:34:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:39,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:34:39,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:34:39,385 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 03:34:39,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:34:39,561 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 03:34:39,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971303179] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:34:39,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:34:39,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 03:34:39,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811656155] [2024-11-14 03:34:39,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:34:39,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:34:39,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:34:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:34:39,563 INFO L87 Difference]: Start difference. First operand 1963 states and 2574 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 03:34:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:40,641 INFO L93 Difference]: Finished difference Result 2754 states and 3473 transitions. [2024-11-14 03:34:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:34:40,641 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 03:34:40,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:34:40,650 INFO L225 Difference]: With dead ends: 2754 [2024-11-14 03:34:40,650 INFO L226 Difference]: Without dead ends: 1700 [2024-11-14 03:34:40,652 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 03:34:40,653 INFO L432 NwaCegarLoop]: 240 mSDtfsCounter, 684 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:34:40,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 840 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:34:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2024-11-14 03:34:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1644. [2024-11-14 03:34:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1253 states have (on average 1.3112529928172387) internal successors, (1643), 1269 states have internal predecessors, (1643), 230 states have call successors, (230), 135 states have call predecessors, (230), 159 states have return successors, (320), 241 states have call predecessors, (320), 229 states have call successors, (320) [2024-11-14 03:34:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2193 transitions. [2024-11-14 03:34:41,139 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2193 transitions. Word has length 125 [2024-11-14 03:34:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:34:41,140 INFO L471 AbstractCegarLoop]: Abstraction has 1644 states and 2193 transitions. [2024-11-14 03:34:41,140 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 03:34:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2193 transitions. [2024-11-14 03:34:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 03:34:41,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:34:41,144 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, 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] [2024-11-14 03:34:41,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:34:41,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:34:41,348 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:34:41,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:34:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash 502357385, now seen corresponding path program 1 times [2024-11-14 03:34:41,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:34:41,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026072621] [2024-11-14 03:34:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:41,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:34:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:34:41,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:34:41,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026072621] [2024-11-14 03:34:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026072621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:34:41,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738030513] [2024-11-14 03:34:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:41,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:34:41,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:34:41,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:34:41,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:34:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:41,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:34:41,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:34:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:34:41,741 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:34:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738030513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:34:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:34:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:34:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669292003] [2024-11-14 03:34:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:34:41,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:34:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:34:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:34:41,744 INFO L87 Difference]: Start difference. First operand 1644 states and 2193 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:42,392 INFO L93 Difference]: Finished difference Result 3252 states and 4793 transitions. [2024-11-14 03:34:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:34:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2024-11-14 03:34:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:34:42,411 INFO L225 Difference]: With dead ends: 3252 [2024-11-14 03:34:42,411 INFO L226 Difference]: Without dead ends: 2440 [2024-11-14 03:34:42,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 03:34:42,416 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 299 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:34:42,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:34:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2024-11-14 03:34:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2433. [2024-11-14 03:34:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1920 states have (on average 1.3651041666666666) internal successors, (2621), 1939 states have internal predecessors, (2621), 322 states have call successors, (322), 165 states have call predecessors, (322), 189 states have return successors, (462), 330 states have call predecessors, (462), 321 states have call successors, (462) [2024-11-14 03:34:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3405 transitions. [2024-11-14 03:34:42,949 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3405 transitions. Word has length 123 [2024-11-14 03:34:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:34:42,950 INFO L471 AbstractCegarLoop]: Abstraction has 2433 states and 3405 transitions. [2024-11-14 03:34:42,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3405 transitions. [2024-11-14 03:34:42,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 03:34:42,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:34:42,955 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, 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] [2024-11-14 03:34:42,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:34:43,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:34:43,156 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:34:43,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:34:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1041025001, now seen corresponding path program 1 times [2024-11-14 03:34:43,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:34:43,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976093355] [2024-11-14 03:34:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:43,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:34:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:34:43,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:34:43,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976093355] [2024-11-14 03:34:43,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976093355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:34:43,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595811278] [2024-11-14 03:34:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:43,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:34:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:34:43,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:34:43,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:34:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:43,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:34:43,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:34:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:34:43,514 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:34:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595811278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:34:43,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:34:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:34:43,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72152492] [2024-11-14 03:34:43,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:34:43,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:34:43,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:34:43,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:34:43,516 INFO L87 Difference]: Start difference. First operand 2433 states and 3405 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:44,078 INFO L93 Difference]: Finished difference Result 5604 states and 8503 transitions. [2024-11-14 03:34:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:34:44,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2024-11-14 03:34:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:34:44,102 INFO L225 Difference]: With dead ends: 5604 [2024-11-14 03:34:44,102 INFO L226 Difference]: Without dead ends: 4003 [2024-11-14 03:34:44,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 03:34:44,113 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 317 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:34:44,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:34:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2024-11-14 03:34:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3991. [2024-11-14 03:34:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3239 states have (on average 1.4038283420808892) internal successors, (4547), 3264 states have internal predecessors, (4547), 501 states have call successors, (501), 225 states have call predecessors, (501), 249 states have return successors, (737), 503 states have call predecessors, (737), 500 states have call successors, (737) [2024-11-14 03:34:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 5785 transitions. [2024-11-14 03:34:44,719 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 5785 transitions. Word has length 123 [2024-11-14 03:34:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:34:44,720 INFO L471 AbstractCegarLoop]: Abstraction has 3991 states and 5785 transitions. [2024-11-14 03:34:44,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 5785 transitions. [2024-11-14 03:34:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 03:34:44,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:34:44,726 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, 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] [2024-11-14 03:34:44,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:34:44,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-14 03:34:44,926 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:34:44,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:34:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1506171465, now seen corresponding path program 1 times [2024-11-14 03:34:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:34:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9983370] [2024-11-14 03:34:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:34:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:34:45,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:34:45,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9983370] [2024-11-14 03:34:45,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9983370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:34:45,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201475862] [2024-11-14 03:34:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:45,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:34:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:34:45,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:34:45,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:34:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:45,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:34:45,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:34:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:34:45,272 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:34:45,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201475862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:34:45,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:34:45,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:34:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133631966] [2024-11-14 03:34:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:34:45,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:34:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:34:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:34:45,273 INFO L87 Difference]: Start difference. First operand 3991 states and 5785 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:46,234 INFO L93 Difference]: Finished difference Result 10248 states and 15782 transitions. [2024-11-14 03:34:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:34:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2024-11-14 03:34:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:34:46,264 INFO L225 Difference]: With dead ends: 10248 [2024-11-14 03:34:46,264 INFO L226 Difference]: Without dead ends: 7089 [2024-11-14 03:34:46,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 03:34:46,274 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 320 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:34:46,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:34:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2024-11-14 03:34:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 7067. [2024-11-14 03:34:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7067 states, 5847 states have (on average 1.4262014708397468) internal successors, (8339), 5884 states have internal predecessors, (8339), 849 states have call successors, (849), 345 states have call predecessors, (849), 369 states have return successors, (1269), 839 states have call predecessors, (1269), 848 states have call successors, (1269) [2024-11-14 03:34:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7067 states to 7067 states and 10457 transitions. [2024-11-14 03:34:47,046 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 10457 transitions. Word has length 123 [2024-11-14 03:34:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:34:47,046 INFO L471 AbstractCegarLoop]: Abstraction has 7067 states and 10457 transitions. [2024-11-14 03:34:47,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 10457 transitions. [2024-11-14 03:34:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 03:34:47,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:34:47,055 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, 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] [2024-11-14 03:34:47,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:34:47,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 03:34:47,256 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:34:47,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:34:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1174983703, now seen corresponding path program 1 times [2024-11-14 03:34:47,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:34:47,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174366874] [2024-11-14 03:34:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:34:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:34:47,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:34:47,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174366874] [2024-11-14 03:34:47,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174366874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:34:47,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951563452] [2024-11-14 03:34:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:47,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:34:47,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:34:47,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:34:47,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:34:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:47,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:34:47,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:34:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:34:47,635 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:34:47,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951563452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:34:47,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:34:47,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:34:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811910591] [2024-11-14 03:34:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:34:47,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:34:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:34:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:34:47,637 INFO L87 Difference]: Start difference. First operand 7067 states and 10457 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:48,912 INFO L93 Difference]: Finished difference Result 19416 states and 30058 transitions. [2024-11-14 03:34:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:34:48,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2024-11-14 03:34:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:34:48,968 INFO L225 Difference]: With dead ends: 19416 [2024-11-14 03:34:48,968 INFO L226 Difference]: Without dead ends: 13181 [2024-11-14 03:34:48,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 03:34:48,995 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 305 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:34:48,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:34:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13181 states. [2024-11-14 03:34:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13181 to 13139. [2024-11-14 03:34:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13139 states, 11003 states have (on average 1.4362446605471235) internal successors, (15803), 11064 states have internal predecessors, (15803), 1525 states have call successors, (1525), 585 states have call predecessors, (1525), 609 states have return successors, (2297), 1491 states have call predecessors, (2297), 1524 states have call successors, (2297) [2024-11-14 03:34:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13139 states to 13139 states and 19625 transitions. [2024-11-14 03:34:50,336 INFO L78 Accepts]: Start accepts. Automaton has 13139 states and 19625 transitions. Word has length 123 [2024-11-14 03:34:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:34:50,336 INFO L471 AbstractCegarLoop]: Abstraction has 13139 states and 19625 transitions. [2024-11-14 03:34:50,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 13139 states and 19625 transitions. [2024-11-14 03:34:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 03:34:50,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:34:50,350 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, 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] [2024-11-14 03:34:50,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 03:34:50,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 03:34:50,551 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:34:50,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:34:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1152470601, now seen corresponding path program 1 times [2024-11-14 03:34:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:34:50,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846389632] [2024-11-14 03:34:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:34:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:34:50,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:34:50,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846389632] [2024-11-14 03:34:50,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846389632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:34:50,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585378818] [2024-11-14 03:34:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:50,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:34:50,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:34:50,665 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:34:50,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:34:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:50,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:34:50,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:34:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:34:50,912 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:34:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585378818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:34:50,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:34:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:34:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349522300] [2024-11-14 03:34:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:34:50,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:34:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:34:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:34:50,915 INFO L87 Difference]: Start difference. First operand 13139 states and 19625 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:53,127 INFO L93 Difference]: Finished difference Result 37512 states and 58046 transitions. [2024-11-14 03:34:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:34:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2024-11-14 03:34:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:34:53,219 INFO L225 Difference]: With dead ends: 37512 [2024-11-14 03:34:53,219 INFO L226 Difference]: Without dead ends: 25205 [2024-11-14 03:34:53,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 03:34:53,258 INFO L432 NwaCegarLoop]: 289 mSDtfsCounter, 311 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:34:53,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 496 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:34:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25205 states. [2024-11-14 03:34:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25205 to 25123. [2024-11-14 03:34:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25123 states, 21195 states have (on average 1.4385940080207595) internal successors, (30491), 21304 states have internal predecessors, (30491), 2837 states have call successors, (2837), 1065 states have call predecessors, (2837), 1089 states have return successors, (4281), 2755 states have call predecessors, (4281), 2836 states have call successors, (4281) [2024-11-14 03:34:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25123 states to 25123 states and 37609 transitions. [2024-11-14 03:34:55,502 INFO L78 Accepts]: Start accepts. Automaton has 25123 states and 37609 transitions. Word has length 123 [2024-11-14 03:34:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:34:55,502 INFO L471 AbstractCegarLoop]: Abstraction has 25123 states and 37609 transitions. [2024-11-14 03:34:55,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:34:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25123 states and 37609 transitions. [2024-11-14 03:34:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 03:34:55,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:34:55,525 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, 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] [2024-11-14 03:34:55,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:34:55,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ecf9f71-7ab5-4f19-bf1f-892ec22488e6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 03:34:55,726 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:34:55,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:34:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash -970970967, now seen corresponding path program 1 times [2024-11-14 03:34:55,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:34:55,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763492207] [2024-11-14 03:34:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:34:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:34:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:34:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 03:34:56,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:34:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763492207] [2024-11-14 03:34:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763492207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:34:56,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:34:56,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:34:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489382787] [2024-11-14 03:34:56,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:34:56,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:34:56,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:34:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:34:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:34:56,024 INFO L87 Difference]: Start difference. First operand 25123 states and 37609 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:34:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:34:59,985 INFO L93 Difference]: Finished difference Result 66055 states and 100411 transitions. [2024-11-14 03:34:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:34:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2024-11-14 03:34:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:35:00,160 INFO L225 Difference]: With dead ends: 66055 [2024-11-14 03:35:00,160 INFO L226 Difference]: Without dead ends: 41765 [2024-11-14 03:35:00,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:35:00,220 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 776 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:35:00,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1019 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:35:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41765 states. [2024-11-14 03:35:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41765 to 39299. [2024-11-14 03:35:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39299 states, 33211 states have (on average 1.435518352353136) internal successors, (47675), 33384 states have internal predecessors, (47675), 4421 states have call successors, (4421), 1641 states have call predecessors, (4421), 1665 states have return successors, (6873), 4275 states have call predecessors, (6873), 4420 states have call successors, (6873) [2024-11-14 03:35:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39299 states to 39299 states and 58969 transitions. [2024-11-14 03:35:03,993 INFO L78 Accepts]: Start accepts. Automaton has 39299 states and 58969 transitions. Word has length 123 [2024-11-14 03:35:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:35:03,994 INFO L471 AbstractCegarLoop]: Abstraction has 39299 states and 58969 transitions. [2024-11-14 03:35:03,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:35:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39299 states and 58969 transitions. [2024-11-14 03:35:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 03:35:04,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:04,027 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, 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] [2024-11-14 03:35:04,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-14 03:35:04,029 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:04,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:04,029 INFO L85 PathProgramCache]: Analyzing trace with hash 541159821, now seen corresponding path program 1 times [2024-11-14 03:35:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:04,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529404492] [2024-11-14 03:35:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:04,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 03:35:04,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:04,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529404492] [2024-11-14 03:35:04,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529404492] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:35:04,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:35:04,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:35:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168520911] [2024-11-14 03:35:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:35:04,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:35:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:35:04,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:35:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:35:04,314 INFO L87 Difference]: Start difference. First operand 39299 states and 58969 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)