./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ebb73aa3b2fe06c298821e537034d0c16e316e18b31a7db411eb85fc916df11 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:00:48,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:00:48,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:00:48,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:00:48,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:00:48,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:00:48,279 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:00:48,280 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:00:48,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:00:48,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:00:48,282 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:00:48,283 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:00:48,283 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:00:48,284 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:00:48,285 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:00:48,285 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:00:48,286 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:00:48,286 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:00:48,287 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:00:48,288 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:00:48,288 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:00:48,289 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:00:48,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:00:48,291 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:00:48,291 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:00:48,292 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:00:48,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:00:48,293 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:00:48,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:00:48,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:00:48,295 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:00:48,295 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:00:48,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:00:48,296 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:00:48,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:00:48,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:00:48,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:00:48,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:00:48,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:00:48,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:00:48,299 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:00:48,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:00:48,300 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:00:48,300 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:00:48,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:00:48,301 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ebb73aa3b2fe06c298821e537034d0c16e316e18b31a7db411eb85fc916df11 [2023-11-19 05:00:48,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:00:48,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:00:48,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:00:48,626 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:00:48,627 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:00:48,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c [2023-11-19 05:00:51,879 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:00:52,117 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:00:52,118 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c [2023-11-19 05:00:52,134 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/data/1e31380ee/44a3c635408842bcaff1b2ea9d82dd90/FLAGd69a9ca93 [2023-11-19 05:00:52,149 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/data/1e31380ee/44a3c635408842bcaff1b2ea9d82dd90 [2023-11-19 05:00:52,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:00:52,154 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:00:52,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:00:52,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:00:52,165 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:00:52,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182ca15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52, skipping insertion in model container [2023-11-19 05:00:52,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,225 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:00:52,390 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c[911,924] [2023-11-19 05:00:52,457 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c[8416,8429] [2023-11-19 05:00:52,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:00:52,525 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:00:52,540 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c[911,924] [2023-11-19 05:00:52,569 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.02.cil-1.c[8416,8429] [2023-11-19 05:00:52,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:00:52,631 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:00:52,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52 WrapperNode [2023-11-19 05:00:52,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:00:52,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:00:52,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:00:52,634 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:00:52,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,698 INFO L138 Inliner]: procedures = 59, calls = 67, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 508 [2023-11-19 05:00:52,698 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:00:52,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:00:52,699 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:00:52,700 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:00:52,710 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,716 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,729 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,739 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:00:52,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:00:52,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:00:52,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:00:52,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (1/1) ... [2023-11-19 05:00:52,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:00:52,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:52,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:00:52,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:00:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:00:52,865 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:00:52,865 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:00:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-19 05:00:52,868 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-19 05:00:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 05:00:52,869 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 05:00:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 05:00:52,869 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 05:00:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-19 05:00:52,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-19 05:00:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 05:00:52,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 05:00:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 05:00:52,870 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 05:00:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-19 05:00:52,871 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-19 05:00:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-19 05:00:52,873 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-19 05:00:52,874 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-19 05:00:52,874 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-19 05:00:52,874 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 05:00:52,875 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 05:00:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:00:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 05:00:52,876 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 05:00:52,877 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-19 05:00:52,877 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-19 05:00:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:00:52,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:00:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 05:00:52,879 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 05:00:53,052 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:00:53,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:00:53,755 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-11-19 05:00:53,755 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-19 05:00:53,805 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:00:54,073 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:00:54,073 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-19 05:00:54,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:54 BoogieIcfgContainer [2023-11-19 05:00:54,086 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:00:54,090 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:00:54,090 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:00:54,094 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:00:54,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:00:52" (1/3) ... [2023-11-19 05:00:54,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5a575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:54, skipping insertion in model container [2023-11-19 05:00:54,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:52" (2/3) ... [2023-11-19 05:00:54,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5a575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:54, skipping insertion in model container [2023-11-19 05:00:54,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:54" (3/3) ... [2023-11-19 05:00:54,098 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.02.cil-1.c [2023-11-19 05:00:54,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:00:54,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:00:54,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:00:54,186 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44951613, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:00:54,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:00:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 117 states have internal predecessors, (164), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 05:00:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 05:00:54,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:54,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:54,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:54,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash -684426753, now seen corresponding path program 1 times [2023-11-19 05:00:54,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:54,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551503311] [2023-11-19 05:00:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:54,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:00:54,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:54,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551503311] [2023-11-19 05:00:54,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551503311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:54,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:54,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:00:54,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476295864] [2023-11-19 05:00:54,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:54,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:00:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:00:54,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:00:54,774 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 117 states have internal predecessors, (164), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:00:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:55,616 INFO L93 Difference]: Finished difference Result 589 states and 865 transitions. [2023-11-19 05:00:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:00:55,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 37 [2023-11-19 05:00:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:55,643 INFO L225 Difference]: With dead ends: 589 [2023-11-19 05:00:55,643 INFO L226 Difference]: Without dead ends: 424 [2023-11-19 05:00:55,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:55,659 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 569 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:55,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 541 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:00:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-19 05:00:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2023-11-19 05:00:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 297 states have (on average 1.367003367003367) internal successors, (406), 304 states have internal predecessors, (406), 77 states have call successors, (77), 38 states have call predecessors, (77), 37 states have return successors, (97), 72 states have call predecessors, (97), 75 states have call successors, (97) [2023-11-19 05:00:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 580 transitions. [2023-11-19 05:00:55,775 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 580 transitions. Word has length 37 [2023-11-19 05:00:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:55,775 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 580 transitions. [2023-11-19 05:00:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:00:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 580 transitions. [2023-11-19 05:00:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:00:55,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:55,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:55,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:00:55,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:55,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash 886133452, now seen corresponding path program 1 times [2023-11-19 05:00:55,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:55,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306047001] [2023-11-19 05:00:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:00:55,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306047001] [2023-11-19 05:00:55,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306047001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:55,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:00:55,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237169254] [2023-11-19 05:00:55,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:55,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:55,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:00:55,898 INFO L87 Difference]: Start difference. First operand 413 states and 580 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:00:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:56,209 INFO L93 Difference]: Finished difference Result 613 states and 857 transitions. [2023-11-19 05:00:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:00:56,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 44 [2023-11-19 05:00:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:56,215 INFO L225 Difference]: With dead ends: 613 [2023-11-19 05:00:56,215 INFO L226 Difference]: Without dead ends: 542 [2023-11-19 05:00:56,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:00:56,218 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 272 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:56,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 401 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:00:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-11-19 05:00:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 531. [2023-11-19 05:00:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 381 states have (on average 1.3595800524934383) internal successors, (518), 388 states have internal predecessors, (518), 97 states have call successors, (97), 52 states have call predecessors, (97), 51 states have return successors, (120), 92 states have call predecessors, (120), 95 states have call successors, (120) [2023-11-19 05:00:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 735 transitions. [2023-11-19 05:00:56,280 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 735 transitions. Word has length 44 [2023-11-19 05:00:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:56,281 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 735 transitions. [2023-11-19 05:00:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:00:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 735 transitions. [2023-11-19 05:00:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:00:56,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:56,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:56,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:00:56,291 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:56,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:56,293 INFO L85 PathProgramCache]: Analyzing trace with hash -663269919, now seen corresponding path program 1 times [2023-11-19 05:00:56,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:56,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852283854] [2023-11-19 05:00:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:56,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:00:56,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852283854] [2023-11-19 05:00:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852283854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:56,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:56,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:00:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526658847] [2023-11-19 05:00:56,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:56,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:00:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:56,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:00:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:56,466 INFO L87 Difference]: Start difference. First operand 531 states and 735 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:00:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:57,195 INFO L93 Difference]: Finished difference Result 1068 states and 1458 transitions. [2023-11-19 05:00:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:00:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-19 05:00:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:57,201 INFO L225 Difference]: With dead ends: 1068 [2023-11-19 05:00:57,201 INFO L226 Difference]: Without dead ends: 602 [2023-11-19 05:00:57,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:00:57,204 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 660 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:57,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 726 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:00:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-11-19 05:00:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 517. [2023-11-19 05:00:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 367 states have (on average 1.3215258855585832) internal successors, (485), 374 states have internal predecessors, (485), 97 states have call successors, (97), 52 states have call predecessors, (97), 51 states have return successors, (117), 92 states have call predecessors, (117), 95 states have call successors, (117) [2023-11-19 05:00:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 699 transitions. [2023-11-19 05:00:57,325 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 699 transitions. Word has length 45 [2023-11-19 05:00:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:57,326 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 699 transitions. [2023-11-19 05:00:57,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:00:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 699 transitions. [2023-11-19 05:00:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 05:00:57,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:57,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:57,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:00:57,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:57,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash -713097162, now seen corresponding path program 1 times [2023-11-19 05:00:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159621020] [2023-11-19 05:00:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:00:57,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159621020] [2023-11-19 05:00:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159621020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:57,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:57,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:00:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576424176] [2023-11-19 05:00:57,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:57,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:00:57,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:57,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:00:57,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:57,510 INFO L87 Difference]: Start difference. First operand 517 states and 699 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:00:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:58,175 INFO L93 Difference]: Finished difference Result 983 states and 1307 transitions. [2023-11-19 05:00:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:00:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2023-11-19 05:00:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:58,186 INFO L225 Difference]: With dead ends: 983 [2023-11-19 05:00:58,186 INFO L226 Difference]: Without dead ends: 806 [2023-11-19 05:00:58,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:00:58,197 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 568 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:58,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 687 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:00:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-11-19 05:00:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 781. [2023-11-19 05:00:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 548 states have (on average 1.2846715328467153) internal successors, (704), 555 states have internal predecessors, (704), 146 states have call successors, (146), 86 states have call predecessors, (146), 85 states have return successors, (183), 141 states have call predecessors, (183), 144 states have call successors, (183) [2023-11-19 05:00:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1033 transitions. [2023-11-19 05:00:58,329 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1033 transitions. Word has length 46 [2023-11-19 05:00:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:58,330 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1033 transitions. [2023-11-19 05:00:58,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 05:00:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1033 transitions. [2023-11-19 05:00:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 05:00:58,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:58,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:58,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:00:58,332 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:58,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1297393951, now seen corresponding path program 1 times [2023-11-19 05:00:58,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:58,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915057803] [2023-11-19 05:00:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:58,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:00:58,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:58,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915057803] [2023-11-19 05:00:58,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915057803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:58,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:58,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:00:58,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931303886] [2023-11-19 05:00:58,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:58,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:00:58,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:00:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:58,392 INFO L87 Difference]: Start difference. First operand 781 states and 1033 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:00:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:58,497 INFO L93 Difference]: Finished difference Result 782 states and 1034 transitions. [2023-11-19 05:00:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:00:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (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 50 [2023-11-19 05:00:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:58,502 INFO L225 Difference]: With dead ends: 782 [2023-11-19 05:00:58,503 INFO L226 Difference]: Without dead ends: 338 [2023-11-19 05:00:58,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:58,505 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 177 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:58,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 161 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:00:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-19 05:00:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2023-11-19 05:00:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 246 states have (on average 1.3495934959349594) internal successors, (332), 250 states have internal predecessors, (332), 61 states have call successors, (61), 30 states have call predecessors, (61), 30 states have return successors, (83), 58 states have call predecessors, (83), 61 states have call successors, (83) [2023-11-19 05:00:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 476 transitions. [2023-11-19 05:00:58,548 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 476 transitions. Word has length 50 [2023-11-19 05:00:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:58,553 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 476 transitions. [2023-11-19 05:00:58,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:00:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 476 transitions. [2023-11-19 05:00:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 05:00:58,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:58,557 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:00:58,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:00:58,558 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:58,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash 591153060, now seen corresponding path program 1 times [2023-11-19 05:00:58,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:58,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853731144] [2023-11-19 05:00:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:00:58,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:58,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853731144] [2023-11-19 05:00:58,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853731144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:58,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:58,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:00:58,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142180923] [2023-11-19 05:00:58,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:58,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:00:58,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:00:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:58,950 INFO L87 Difference]: Start difference. First operand 338 states and 476 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:00:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:59,251 INFO L93 Difference]: Finished difference Result 874 states and 1243 transitions. [2023-11-19 05:00:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:00:59,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 67 [2023-11-19 05:00:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:59,257 INFO L225 Difference]: With dead ends: 874 [2023-11-19 05:00:59,257 INFO L226 Difference]: Without dead ends: 543 [2023-11-19 05:00:59,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:00:59,260 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 213 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:59,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 328 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:00:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-11-19 05:00:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 523. [2023-11-19 05:00:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 380 states have (on average 1.331578947368421) internal successors, (506), 386 states have internal predecessors, (506), 94 states have call successors, (94), 48 states have call predecessors, (94), 48 states have return successors, (131), 89 states have call predecessors, (131), 94 states have call successors, (131) [2023-11-19 05:00:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 731 transitions. [2023-11-19 05:00:59,322 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 731 transitions. Word has length 67 [2023-11-19 05:00:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:59,323 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 731 transitions. [2023-11-19 05:00:59,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:00:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 731 transitions. [2023-11-19 05:00:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:00:59,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:59,327 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:00:59,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:00:59,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:59,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -711977943, now seen corresponding path program 1 times [2023-11-19 05:00:59,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:59,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753440656] [2023-11-19 05:00:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:00:59,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:59,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753440656] [2023-11-19 05:00:59,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753440656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:59,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:59,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:00:59,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7808037] [2023-11-19 05:00:59,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:59,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:00:59,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:59,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:00:59,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:59,420 INFO L87 Difference]: Start difference. First operand 523 states and 731 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:00:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:59,537 INFO L93 Difference]: Finished difference Result 1090 states and 1544 transitions. [2023-11-19 05:00:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:00:59,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2023-11-19 05:00:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:59,544 INFO L225 Difference]: With dead ends: 1090 [2023-11-19 05:00:59,544 INFO L226 Difference]: Without dead ends: 639 [2023-11-19 05:00:59,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:59,548 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 38 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:59,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 222 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:00:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-11-19 05:00:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 578. [2023-11-19 05:00:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 429 states have (on average 1.344988344988345) internal successors, (577), 435 states have internal predecessors, (577), 97 states have call successors, (97), 51 states have call predecessors, (97), 51 states have return successors, (134), 92 states have call predecessors, (134), 97 states have call successors, (134) [2023-11-19 05:00:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 808 transitions. [2023-11-19 05:00:59,638 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 808 transitions. Word has length 69 [2023-11-19 05:00:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:59,639 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 808 transitions. [2023-11-19 05:00:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:00:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 808 transitions. [2023-11-19 05:00:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:00:59,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:59,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:59,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:00:59,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:59,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1228898307, now seen corresponding path program 1 times [2023-11-19 05:00:59,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:59,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867980365] [2023-11-19 05:00:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:59,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:00:59,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:59,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867980365] [2023-11-19 05:00:59,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867980365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:59,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:59,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:00:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932198526] [2023-11-19 05:00:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:59,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:00:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:00:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:59,754 INFO L87 Difference]: Start difference. First operand 578 states and 808 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:00:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:59,900 INFO L93 Difference]: Finished difference Result 1686 states and 2400 transitions. [2023-11-19 05:00:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:00:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 90 [2023-11-19 05:00:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:59,909 INFO L225 Difference]: With dead ends: 1686 [2023-11-19 05:00:59,909 INFO L226 Difference]: Without dead ends: 1114 [2023-11-19 05:00:59,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:59,912 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 75 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:59,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 169 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:00:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-11-19 05:01:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1101. [2023-11-19 05:01:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 816 states have (on average 1.3161764705882353) internal successors, (1074), 827 states have internal predecessors, (1074), 182 states have call successors, (182), 102 states have call predecessors, (182), 102 states have return successors, (249), 172 states have call predecessors, (249), 182 states have call successors, (249) [2023-11-19 05:01:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1505 transitions. [2023-11-19 05:01:00,051 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1505 transitions. Word has length 90 [2023-11-19 05:01:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:00,051 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1505 transitions. [2023-11-19 05:01:00,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:01:00,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1505 transitions. [2023-11-19 05:01:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 05:01:00,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:00,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:00,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:01:00,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:00,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:00,065 INFO L85 PathProgramCache]: Analyzing trace with hash 141626391, now seen corresponding path program 1 times [2023-11-19 05:01:00,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:00,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63377265] [2023-11-19 05:01:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:00,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 05:01:00,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:00,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63377265] [2023-11-19 05:01:00,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63377265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:00,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213105867] [2023-11-19 05:01:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:00,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:00,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:00,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:00,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:01:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:00,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:01:00,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:01:00,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:00,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213105867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:00,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:00,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:01:00,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713669023] [2023-11-19 05:01:00,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:00,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:00,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:00,440 INFO L87 Difference]: Start difference. First operand 1101 states and 1505 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:00,592 INFO L93 Difference]: Finished difference Result 2139 states and 2951 transitions. [2023-11-19 05:01:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2023-11-19 05:01:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:00,602 INFO L225 Difference]: With dead ends: 2139 [2023-11-19 05:01:00,602 INFO L226 Difference]: Without dead ends: 1331 [2023-11-19 05:01:00,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:00,606 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 77 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:00,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 118 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2023-11-19 05:01:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1294. [2023-11-19 05:01:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 980 states have (on average 1.3) internal successors, (1274), 989 states have internal predecessors, (1274), 188 states have call successors, (188), 124 states have call predecessors, (188), 125 states have return successors, (256), 181 states have call predecessors, (256), 188 states have call successors, (256) [2023-11-19 05:01:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1718 transitions. [2023-11-19 05:01:00,785 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1718 transitions. Word has length 101 [2023-11-19 05:01:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:00,785 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1718 transitions. [2023-11-19 05:01:00,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1718 transitions. [2023-11-19 05:01:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 05:01:00,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:00,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:00,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:01:01,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:01,014 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:01,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1915977640, now seen corresponding path program 1 times [2023-11-19 05:01:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:01,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252407551] [2023-11-19 05:01:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:01,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 05:01:01,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:01,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252407551] [2023-11-19 05:01:01,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252407551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:01,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549946779] [2023-11-19 05:01:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:01,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:01,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:01,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:01,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:01:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:01,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:01:01,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:01:01,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:01,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549946779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:01,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:01,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:01:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450462573] [2023-11-19 05:01:01,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:01,299 INFO L87 Difference]: Start difference. First operand 1294 states and 1718 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:01,482 INFO L93 Difference]: Finished difference Result 2469 states and 3304 transitions. [2023-11-19 05:01:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2023-11-19 05:01:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:01,492 INFO L225 Difference]: With dead ends: 2469 [2023-11-19 05:01:01,493 INFO L226 Difference]: Without dead ends: 1522 [2023-11-19 05:01:01,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:01,498 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:01,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 218 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2023-11-19 05:01:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1380. [2023-11-19 05:01:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1054 states have (on average 1.3092979127134725) internal successors, (1380), 1063 states have internal predecessors, (1380), 194 states have call successors, (194), 130 states have call predecessors, (194), 131 states have return successors, (262), 187 states have call predecessors, (262), 194 states have call successors, (262) [2023-11-19 05:01:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1836 transitions. [2023-11-19 05:01:01,677 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1836 transitions. Word has length 101 [2023-11-19 05:01:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:01,678 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 1836 transitions. [2023-11-19 05:01:01,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1836 transitions. [2023-11-19 05:01:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 05:01:01,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:01,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:01,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:01,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:01,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:01,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:01,902 INFO L85 PathProgramCache]: Analyzing trace with hash 209248801, now seen corresponding path program 2 times [2023-11-19 05:01:01,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:01,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771451607] [2023-11-19 05:01:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:01,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 05:01:02,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771451607] [2023-11-19 05:01:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771451607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841766298] [2023-11-19 05:01:02,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:01:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:02,130 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:02,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:01:02,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:01:02,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:01:02,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:01:02,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:01:02,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841766298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:02,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:02,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:01:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886815444] [2023-11-19 05:01:02,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:02,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:02,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:02,288 INFO L87 Difference]: Start difference. First operand 1380 states and 1836 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:01:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:02,509 INFO L93 Difference]: Finished difference Result 2683 states and 3668 transitions. [2023-11-19 05:01:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:02,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2023-11-19 05:01:02,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:02,521 INFO L225 Difference]: With dead ends: 2683 [2023-11-19 05:01:02,522 INFO L226 Difference]: Without dead ends: 1650 [2023-11-19 05:01:02,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:02,526 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 93 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:02,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 218 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2023-11-19 05:01:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1612. [2023-11-19 05:01:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1238 states have (on average 1.2940226171243943) internal successors, (1602), 1249 states have internal predecessors, (1602), 222 states have call successors, (222), 151 states have call predecessors, (222), 151 states have return successors, (315), 212 states have call predecessors, (315), 222 states have call successors, (315) [2023-11-19 05:01:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2139 transitions. [2023-11-19 05:01:02,692 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2139 transitions. Word has length 101 [2023-11-19 05:01:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:02,693 INFO L495 AbstractCegarLoop]: Abstraction has 1612 states and 2139 transitions. [2023-11-19 05:01:02,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:01:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2139 transitions. [2023-11-19 05:01:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:01:02,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:02,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:02,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:02,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:02,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:02,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:02,912 INFO L85 PathProgramCache]: Analyzing trace with hash 989779231, now seen corresponding path program 1 times [2023-11-19 05:01:02,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:02,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508401226] [2023-11-19 05:01:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:02,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:01:03,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:03,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508401226] [2023-11-19 05:01:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508401226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:03,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863604379] [2023-11-19 05:01:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:03,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:03,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:03,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:01:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:03,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:01:03,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:01:03,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:03,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863604379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:03,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:03,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:01:03,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23490504] [2023-11-19 05:01:03,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:03,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:03,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:03,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:03,387 INFO L87 Difference]: Start difference. First operand 1612 states and 2139 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:01:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:03,665 INFO L93 Difference]: Finished difference Result 3829 states and 5118 transitions. [2023-11-19 05:01:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2023-11-19 05:01:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:03,683 INFO L225 Difference]: With dead ends: 3829 [2023-11-19 05:01:03,684 INFO L226 Difference]: Without dead ends: 2224 [2023-11-19 05:01:03,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:03,690 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:03,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 184 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2023-11-19 05:01:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1804. [2023-11-19 05:01:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1402 states have (on average 1.3052781740370898) internal successors, (1830), 1414 states have internal predecessors, (1830), 236 states have call successors, (236), 165 states have call predecessors, (236), 165 states have return successors, (329), 225 states have call predecessors, (329), 236 states have call successors, (329) [2023-11-19 05:01:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2395 transitions. [2023-11-19 05:01:03,930 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2395 transitions. Word has length 102 [2023-11-19 05:01:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:03,930 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2395 transitions. [2023-11-19 05:01:03,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:01:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2395 transitions. [2023-11-19 05:01:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 05:01:03,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:03,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:03,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:04,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:04,160 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:04,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1225648976, now seen corresponding path program 1 times [2023-11-19 05:01:04,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:04,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761299253] [2023-11-19 05:01:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:04,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:01:04,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:04,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761299253] [2023-11-19 05:01:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761299253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:04,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072978923] [2023-11-19 05:01:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:04,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:04,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:04,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:01:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:04,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:01:04,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:01:04,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:04,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072978923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:04,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:04,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-19 05:01:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111286998] [2023-11-19 05:01:04,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:04,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:04,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:01:04,630 INFO L87 Difference]: Start difference. First operand 1804 states and 2395 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:01:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:04,982 INFO L93 Difference]: Finished difference Result 4073 states and 5423 transitions. [2023-11-19 05:01:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:01:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 104 [2023-11-19 05:01:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:04,997 INFO L225 Difference]: With dead ends: 4073 [2023-11-19 05:01:04,998 INFO L226 Difference]: Without dead ends: 2471 [2023-11-19 05:01:05,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:01:05,003 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 124 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:05,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 234 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2023-11-19 05:01:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2225. [2023-11-19 05:01:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 1767 states have (on average 1.2874929258630448) internal successors, (2275), 1783 states have internal predecessors, (2275), 254 states have call successors, (254), 202 states have call predecessors, (254), 203 states have return successors, (372), 240 states have call predecessors, (372), 254 states have call successors, (372) [2023-11-19 05:01:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2901 transitions. [2023-11-19 05:01:05,234 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2901 transitions. Word has length 104 [2023-11-19 05:01:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:05,234 INFO L495 AbstractCegarLoop]: Abstraction has 2225 states and 2901 transitions. [2023-11-19 05:01:05,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:01:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2901 transitions. [2023-11-19 05:01:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 05:01:05,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:05,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:05,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:05,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:05,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:05,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash -770763466, now seen corresponding path program 1 times [2023-11-19 05:01:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002640248] [2023-11-19 05:01:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 05:01:05,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002640248] [2023-11-19 05:01:05,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002640248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:05,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233675113] [2023-11-19 05:01:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:05,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:05,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:05,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:01:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:05,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 05:01:05,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:01:05,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233675113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:05,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:05,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2023-11-19 05:01:05,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77514122] [2023-11-19 05:01:05,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:05,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:01:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:01:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:01:05,886 INFO L87 Difference]: Start difference. First operand 2225 states and 2901 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:01:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:06,579 INFO L93 Difference]: Finished difference Result 5440 states and 7106 transitions. [2023-11-19 05:01:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:01:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 105 [2023-11-19 05:01:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:06,599 INFO L225 Difference]: With dead ends: 5440 [2023-11-19 05:01:06,599 INFO L226 Difference]: Without dead ends: 2805 [2023-11-19 05:01:06,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:01:06,608 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 173 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:06,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 376 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2023-11-19 05:01:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2711. [2023-11-19 05:01:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2118 states have (on average 1.2700661000944287) internal successors, (2690), 2134 states have internal predecessors, (2690), 334 states have call successors, (334), 260 states have call predecessors, (334), 258 states have return successors, (486), 317 states have call predecessors, (486), 334 states have call successors, (486) [2023-11-19 05:01:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3510 transitions. [2023-11-19 05:01:06,933 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3510 transitions. Word has length 105 [2023-11-19 05:01:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:06,933 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3510 transitions. [2023-11-19 05:01:06,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:01:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3510 transitions. [2023-11-19 05:01:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 05:01:06,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:06,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:06,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 05:01:07,155 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:07,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1599024872, now seen corresponding path program 1 times [2023-11-19 05:01:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:07,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640086862] [2023-11-19 05:01:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 05:01:07,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640086862] [2023-11-19 05:01:07,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640086862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915721520] [2023-11-19 05:01:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:07,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:07,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:07,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:01:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:07,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:01:07,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:01:07,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915721520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:07,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:07,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:01:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094384419] [2023-11-19 05:01:07,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:07,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:07,479 INFO L87 Difference]: Start difference. First operand 2711 states and 3510 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:07,873 INFO L93 Difference]: Finished difference Result 5081 states and 6684 transitions. [2023-11-19 05:01:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 105 [2023-11-19 05:01:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:07,899 INFO L225 Difference]: With dead ends: 5081 [2023-11-19 05:01:07,899 INFO L226 Difference]: Without dead ends: 3646 [2023-11-19 05:01:07,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:07,907 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 51 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:07,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 236 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2023-11-19 05:01:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3095. [2023-11-19 05:01:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 2442 states have (on average 1.2735462735462735) internal successors, (3110), 2458 states have internal predecessors, (3110), 364 states have call successors, (364), 290 states have call predecessors, (364), 288 states have return successors, (516), 347 states have call predecessors, (516), 364 states have call successors, (516) [2023-11-19 05:01:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 3990 transitions. [2023-11-19 05:01:08,309 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 3990 transitions. Word has length 105 [2023-11-19 05:01:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:08,309 INFO L495 AbstractCegarLoop]: Abstraction has 3095 states and 3990 transitions. [2023-11-19 05:01:08,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 3990 transitions. [2023-11-19 05:01:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 05:01:08,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:08,316 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:08,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:08,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 05:01:08,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:08,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:08,533 INFO L85 PathProgramCache]: Analyzing trace with hash -224216197, now seen corresponding path program 1 times [2023-11-19 05:01:08,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:08,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547779902] [2023-11-19 05:01:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:08,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:01:09,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:09,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547779902] [2023-11-19 05:01:09,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547779902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:09,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492878005] [2023-11-19 05:01:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:09,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:09,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:09,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:09,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:01:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:09,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:01:09,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:01:09,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492878005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:09,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:09,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-11-19 05:01:09,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095563331] [2023-11-19 05:01:09,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:09,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:01:09,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:09,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:01:09,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:01:09,408 INFO L87 Difference]: Start difference. First operand 3095 states and 3990 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:01:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:10,017 INFO L93 Difference]: Finished difference Result 5744 states and 7453 transitions. [2023-11-19 05:01:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:01:10,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 110 [2023-11-19 05:01:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:10,040 INFO L225 Difference]: With dead ends: 5744 [2023-11-19 05:01:10,040 INFO L226 Difference]: Without dead ends: 2906 [2023-11-19 05:01:10,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-19 05:01:10,052 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 111 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:10,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 796 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2023-11-19 05:01:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2611. [2023-11-19 05:01:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2065 states have (on average 1.2745762711864406) internal successors, (2632), 2077 states have internal predecessors, (2632), 304 states have call successors, (304), 242 states have call predecessors, (304), 241 states have return successors, (417), 292 states have call predecessors, (417), 304 states have call successors, (417) [2023-11-19 05:01:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 3353 transitions. [2023-11-19 05:01:10,438 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 3353 transitions. Word has length 110 [2023-11-19 05:01:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:10,438 INFO L495 AbstractCegarLoop]: Abstraction has 2611 states and 3353 transitions. [2023-11-19 05:01:10,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:01:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 3353 transitions. [2023-11-19 05:01:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 05:01:10,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:10,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:10,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:10,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 05:01:10,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:10,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -607138711, now seen corresponding path program 1 times [2023-11-19 05:01:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:10,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996417028] [2023-11-19 05:01:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:01:10,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:10,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996417028] [2023-11-19 05:01:10,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996417028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:10,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390206362] [2023-11-19 05:01:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:10,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:10,747 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:01:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:10,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:01:10,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:01:10,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:10,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390206362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:10,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:10,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-19 05:01:10,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717353197] [2023-11-19 05:01:10,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:10,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:10,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:10,920 INFO L87 Difference]: Start difference. First operand 2611 states and 3353 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:11,244 INFO L93 Difference]: Finished difference Result 4444 states and 5945 transitions. [2023-11-19 05:01:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 107 [2023-11-19 05:01:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:11,261 INFO L225 Difference]: With dead ends: 4444 [2023-11-19 05:01:11,261 INFO L226 Difference]: Without dead ends: 2597 [2023-11-19 05:01:11,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:11,268 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 75 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:11,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 241 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2023-11-19 05:01:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2552. [2023-11-19 05:01:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2008 states have (on average 1.2335657370517927) internal successors, (2477), 2020 states have internal predecessors, (2477), 303 states have call successors, (303), 241 states have call predecessors, (303), 240 states have return successors, (416), 291 states have call predecessors, (416), 303 states have call successors, (416) [2023-11-19 05:01:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 3196 transitions. [2023-11-19 05:01:11,555 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 3196 transitions. Word has length 107 [2023-11-19 05:01:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:11,556 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 3196 transitions. [2023-11-19 05:01:11,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:01:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 3196 transitions. [2023-11-19 05:01:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 05:01:11,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:11,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:11,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:11,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 05:01:11,775 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:11,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1674355017, now seen corresponding path program 1 times [2023-11-19 05:01:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:11,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632432444] [2023-11-19 05:01:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 05:01:12,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:12,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632432444] [2023-11-19 05:01:12,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632432444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:12,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291180771] [2023-11-19 05:01:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:12,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:12,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:12,350 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:12,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:01:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:12,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:01:12,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:01:12,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291180771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:12,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:12,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2023-11-19 05:01:12,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011500653] [2023-11-19 05:01:12,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:12,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:01:12,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:01:12,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:01:12,650 INFO L87 Difference]: Start difference. First operand 2552 states and 3196 transitions. Second operand has 6 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 05:01:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:13,160 INFO L93 Difference]: Finished difference Result 4382 states and 5676 transitions. [2023-11-19 05:01:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:01:13,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 107 [2023-11-19 05:01:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:13,172 INFO L225 Difference]: With dead ends: 4382 [2023-11-19 05:01:13,173 INFO L226 Difference]: Without dead ends: 2651 [2023-11-19 05:01:13,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:01:13,179 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 111 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:13,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 140 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:13,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-11-19 05:01:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2594. [2023-11-19 05:01:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2050 states have (on average 1.2141463414634146) internal successors, (2489), 2060 states have internal predecessors, (2489), 299 states have call successors, (299), 243 states have call predecessors, (299), 244 states have return successors, (412), 291 states have call predecessors, (412), 299 states have call successors, (412) [2023-11-19 05:01:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3200 transitions. [2023-11-19 05:01:13,498 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3200 transitions. Word has length 107 [2023-11-19 05:01:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:13,499 INFO L495 AbstractCegarLoop]: Abstraction has 2594 states and 3200 transitions. [2023-11-19 05:01:13,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 05:01:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3200 transitions. [2023-11-19 05:01:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 05:01:13,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:13,505 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:13,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:13,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 05:01:13,719 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:13,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash 893183155, now seen corresponding path program 1 times [2023-11-19 05:01:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:13,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231267633] [2023-11-19 05:01:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:13,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:01:14,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231267633] [2023-11-19 05:01:14,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231267633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:14,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702874238] [2023-11-19 05:01:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:14,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:14,010 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:14,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 05:01:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:14,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 05:01:14,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:01:14,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:14,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702874238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:14,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:14,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-11-19 05:01:14,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638604402] [2023-11-19 05:01:14,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:14,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:01:14,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:14,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:01:14,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:14,232 INFO L87 Difference]: Start difference. First operand 2594 states and 3200 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 05:01:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:14,784 INFO L93 Difference]: Finished difference Result 4241 states and 5185 transitions. [2023-11-19 05:01:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:01:14,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 109 [2023-11-19 05:01:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:14,797 INFO L225 Difference]: With dead ends: 4241 [2023-11-19 05:01:14,798 INFO L226 Difference]: Without dead ends: 2487 [2023-11-19 05:01:14,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:01:14,804 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 164 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:14,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 309 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2023-11-19 05:01:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2319. [2023-11-19 05:01:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 1821 states have (on average 1.1817682591982428) internal successors, (2152), 1832 states have internal predecessors, (2152), 272 states have call successors, (272), 223 states have call predecessors, (272), 225 states have return successors, (342), 264 states have call predecessors, (342), 272 states have call successors, (342) [2023-11-19 05:01:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 2766 transitions. [2023-11-19 05:01:15,269 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 2766 transitions. Word has length 109 [2023-11-19 05:01:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:15,270 INFO L495 AbstractCegarLoop]: Abstraction has 2319 states and 2766 transitions. [2023-11-19 05:01:15,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 05:01:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 2766 transitions. [2023-11-19 05:01:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-19 05:01:15,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:15,276 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-11-19 05:01:15,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:15,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:15,500 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:15,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1646657259, now seen corresponding path program 1 times [2023-11-19 05:01:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:15,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530682502] [2023-11-19 05:01:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-19 05:01:15,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:15,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530682502] [2023-11-19 05:01:15,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530682502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:15,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221218593] [2023-11-19 05:01:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:15,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:15,826 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:15,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 05:01:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:15,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:01:15,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:01:16,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:16,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221218593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:16,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:16,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2023-11-19 05:01:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617883148] [2023-11-19 05:01:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:01:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:01:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:01:16,272 INFO L87 Difference]: Start difference. First operand 2319 states and 2766 transitions. Second operand has 9 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:01:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:17,067 INFO L93 Difference]: Finished difference Result 4984 states and 5900 transitions. [2023-11-19 05:01:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:01:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 113 [2023-11-19 05:01:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:17,077 INFO L225 Difference]: With dead ends: 4984 [2023-11-19 05:01:17,077 INFO L226 Difference]: Without dead ends: 2929 [2023-11-19 05:01:17,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:01:17,083 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 321 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:17,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 253 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:01:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2023-11-19 05:01:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2519. [2023-11-19 05:01:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 1979 states have (on average 1.1707933299646287) internal successors, (2317), 1993 states have internal predecessors, (2317), 292 states have call successors, (292), 239 states have call predecessors, (292), 247 states have return successors, (344), 287 states have call predecessors, (344), 292 states have call successors, (344) [2023-11-19 05:01:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 2953 transitions. [2023-11-19 05:01:17,458 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 2953 transitions. Word has length 113 [2023-11-19 05:01:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:17,459 INFO L495 AbstractCegarLoop]: Abstraction has 2519 states and 2953 transitions. [2023-11-19 05:01:17,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:01:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 2953 transitions. [2023-11-19 05:01:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-19 05:01:17,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:17,464 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:17,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:17,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-19 05:01:17,685 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:17,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2146931655, now seen corresponding path program 1 times [2023-11-19 05:01:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:17,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27271535] [2023-11-19 05:01:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-19 05:01:17,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:17,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27271535] [2023-11-19 05:01:17,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27271535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:17,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:17,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:01:17,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016926237] [2023-11-19 05:01:17,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:17,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:17,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:17,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:17,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:17,849 INFO L87 Difference]: Start difference. First operand 2519 states and 2953 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:01:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:19,139 INFO L93 Difference]: Finished difference Result 8004 states and 9368 transitions. [2023-11-19 05:01:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:19,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 133 [2023-11-19 05:01:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:19,162 INFO L225 Difference]: With dead ends: 8004 [2023-11-19 05:01:19,162 INFO L226 Difference]: Without dead ends: 6574 [2023-11-19 05:01:19,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:19,168 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 238 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:19,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 544 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6574 states. [2023-11-19 05:01:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6574 to 4808. [2023-11-19 05:01:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4808 states, 3756 states have (on average 1.172790202342918) internal successors, (4405), 3779 states have internal predecessors, (4405), 573 states have call successors, (573), 460 states have call predecessors, (573), 478 states have return successors, (659), 569 states have call predecessors, (659), 573 states have call successors, (659) [2023-11-19 05:01:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4808 states to 4808 states and 5637 transitions. [2023-11-19 05:01:19,842 INFO L78 Accepts]: Start accepts. Automaton has 4808 states and 5637 transitions. Word has length 133 [2023-11-19 05:01:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:19,843 INFO L495 AbstractCegarLoop]: Abstraction has 4808 states and 5637 transitions. [2023-11-19 05:01:19,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:01:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4808 states and 5637 transitions. [2023-11-19 05:01:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-19 05:01:19,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:19,856 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:01:19,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-19 05:01:19,856 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:19,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1950600307, now seen corresponding path program 1 times [2023-11-19 05:01:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:19,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091119462] [2023-11-19 05:01:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 75 proven. 11 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-19 05:01:20,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091119462] [2023-11-19 05:01:20,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091119462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031837098] [2023-11-19 05:01:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:20,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:20,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:20,081 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:20,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 05:01:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:20,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:01:20,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-19 05:01:20,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031837098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:01:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624366103] [2023-11-19 05:01:20,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:20,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:20,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:20,334 INFO L87 Difference]: Start difference. First operand 4808 states and 5637 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 05:01:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:21,217 INFO L93 Difference]: Finished difference Result 10367 states and 12135 transitions. [2023-11-19 05:01:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 165 [2023-11-19 05:01:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:21,233 INFO L225 Difference]: With dead ends: 10367 [2023-11-19 05:01:21,233 INFO L226 Difference]: Without dead ends: 5568 [2023-11-19 05:01:21,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:21,243 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 83 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:21,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 397 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2023-11-19 05:01:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5553. [2023-11-19 05:01:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 4323 states have (on average 1.1554476058292853) internal successors, (4995), 4350 states have internal predecessors, (4995), 673 states have call successors, (673), 538 states have call predecessors, (673), 556 states have return successors, (759), 665 states have call predecessors, (759), 673 states have call successors, (759) [2023-11-19 05:01:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 6427 transitions. [2023-11-19 05:01:21,899 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 6427 transitions. Word has length 165 [2023-11-19 05:01:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:21,900 INFO L495 AbstractCegarLoop]: Abstraction has 5553 states and 6427 transitions. [2023-11-19 05:01:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 05:01:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 6427 transitions. [2023-11-19 05:01:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-19 05:01:21,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:21,911 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:21,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:22,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-19 05:01:22,135 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:22,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1366018535, now seen corresponding path program 2 times [2023-11-19 05:01:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:22,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178406756] [2023-11-19 05:01:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:22,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-19 05:01:22,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:22,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178406756] [2023-11-19 05:01:22,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178406756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:22,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:22,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:01:22,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782473148] [2023-11-19 05:01:22,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:22,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:22,223 INFO L87 Difference]: Start difference. First operand 5553 states and 6427 transitions. Second operand has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 05:01:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:23,093 INFO L93 Difference]: Finished difference Result 9023 states and 10446 transitions. [2023-11-19 05:01:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:01:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 166 [2023-11-19 05:01:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:23,108 INFO L225 Difference]: With dead ends: 9023 [2023-11-19 05:01:23,109 INFO L226 Difference]: Without dead ends: 5694 [2023-11-19 05:01:23,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:23,116 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 109 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:23,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 216 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2023-11-19 05:01:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 5421. [2023-11-19 05:01:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5421 states, 4235 states have (on average 1.1515938606847698) internal successors, (4877), 4255 states have internal predecessors, (4877), 655 states have call successors, (655), 528 states have call predecessors, (655), 530 states have return successors, (707), 638 states have call predecessors, (707), 655 states have call successors, (707) [2023-11-19 05:01:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 6239 transitions. [2023-11-19 05:01:23,847 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 6239 transitions. Word has length 166 [2023-11-19 05:01:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:23,848 INFO L495 AbstractCegarLoop]: Abstraction has 5421 states and 6239 transitions. [2023-11-19 05:01:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 05:01:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 6239 transitions. [2023-11-19 05:01:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-19 05:01:23,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:23,861 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:23,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-19 05:01:23,861 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:23,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:23,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1722284472, now seen corresponding path program 1 times [2023-11-19 05:01:23,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:23,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114336771] [2023-11-19 05:01:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:23,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 79 proven. 11 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-19 05:01:24,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:24,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114336771] [2023-11-19 05:01:24,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114336771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:24,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525447811] [2023-11-19 05:01:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:24,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:24,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:24,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:24,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 05:01:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:24,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:01:24,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-19 05:01:24,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525447811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:24,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:24,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-11-19 05:01:24,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025871723] [2023-11-19 05:01:24,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:24,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:24,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:24,342 INFO L87 Difference]: Start difference. First operand 5421 states and 6239 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:01:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:25,563 INFO L93 Difference]: Finished difference Result 12278 states and 14021 transitions. [2023-11-19 05:01:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:25,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 167 [2023-11-19 05:01:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:25,584 INFO L225 Difference]: With dead ends: 12278 [2023-11-19 05:01:25,585 INFO L226 Difference]: Without dead ends: 6866 [2023-11-19 05:01:25,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:25,595 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 64 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:25,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 382 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2023-11-19 05:01:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 6864. [2023-11-19 05:01:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 5306 states have (on average 1.1198643045608745) internal successors, (5942), 5326 states have internal predecessors, (5942), 866 states have call successors, (866), 689 states have call predecessors, (866), 691 states have return successors, (918), 849 states have call predecessors, (918), 866 states have call successors, (918) [2023-11-19 05:01:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 7726 transitions. [2023-11-19 05:01:26,456 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 7726 transitions. Word has length 167 [2023-11-19 05:01:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:26,457 INFO L495 AbstractCegarLoop]: Abstraction has 6864 states and 7726 transitions. [2023-11-19 05:01:26,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:01:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 7726 transitions. [2023-11-19 05:01:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-19 05:01:26,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:26,470 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:26,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-19 05:01:26,683 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:26,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 718288887, now seen corresponding path program 1 times [2023-11-19 05:01:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:26,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424562657] [2023-11-19 05:01:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 97 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-19 05:01:26,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:26,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424562657] [2023-11-19 05:01:26,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424562657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:26,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845940187] [2023-11-19 05:01:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:26,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:26,969 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:26,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 05:01:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:27,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 05:01:27,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-19 05:01:27,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:27,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845940187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:27,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:27,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-11-19 05:01:27,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479516721] [2023-11-19 05:01:27,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:27,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:01:27,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:01:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:27,236 INFO L87 Difference]: Start difference. First operand 6864 states and 7726 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-19 05:01:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:27,867 INFO L93 Difference]: Finished difference Result 8119 states and 9123 transitions. [2023-11-19 05:01:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:01:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 169 [2023-11-19 05:01:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:27,869 INFO L225 Difference]: With dead ends: 8119 [2023-11-19 05:01:27,869 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 05:01:27,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:01:27,885 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 153 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:27,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 350 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:01:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 05:01:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 05:01:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:01:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 05:01:27,887 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2023-11-19 05:01:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:27,888 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 05:01:27,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-19 05:01:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 05:01:27,888 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 05:01:27,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-19 05:01:27,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-19 05:01:27,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:28,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d733bac-5b19-4846-8c24-8978530f9001/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-19 05:01:28,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.