./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh --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 c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:57:28,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:57:28,931 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:57:28,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:57:28,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:57:28,961 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:57:28,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:57:28,962 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:57:28,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:57:28,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:57:28,964 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:57:28,964 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:57:28,965 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:57:28,965 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:57:28,965 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:57:28,966 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:57:28,966 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:57:28,967 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:57:28,967 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:57:28,968 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:57:28,968 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:57:28,969 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:57:28,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:57:28,970 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:57:28,971 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:57:28,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:57:28,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:57:28,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:57:28,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:57:28,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:57:28,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:57:28,974 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:57:28,974 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:57:28,974 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:57:28,975 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:57:28,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:57:28,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:57:28,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:57:28,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:57:28,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:57:28,976 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:57:28,976 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:57:28,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:57:28,977 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:57:28,977 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:57:28,977 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:57:28,977 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:57:28,977 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_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ca11e40cca108d65dd6d7b4fa74385c8fc7845c04d791c76ec52f444c2043 [2023-12-02 16:57:29,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:57:29,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:57:29,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:57:29,213 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:57:29,214 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:57:29,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2023-12-02 16:57:31,970 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:57:32,175 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:57:32,176 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c [2023-12-02 16:57:32,194 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/data/c1dcc1ee2/c5e17346c2694d13ac12342fa0618178/FLAGd59eebacb [2023-12-02 16:57:32,206 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/data/c1dcc1ee2/c5e17346c2694d13ac12342fa0618178 [2023-12-02 16:57:32,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:57:32,209 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:57:32,211 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:57:32,211 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:57:32,215 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:57:32,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673bd1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32, skipping insertion in model container [2023-12-02 16:57:32,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,273 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:57:32,397 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_dd68f04a-c613-4e31-a576-dfbfa127e3a2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[911,924] [2023-12-02 16:57:32,452 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[8416,8429] [2023-12-02 16:57:32,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:57:32,543 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:57:32,552 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_dd68f04a-c613-4e31-a576-dfbfa127e3a2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[911,924] [2023-12-02 16:57:32,572 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_dd68f04a-c613-4e31-a576-dfbfa127e3a2/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-2.c[8416,8429] [2023-12-02 16:57:32,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:57:32,631 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:57:32,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32 WrapperNode [2023-12-02 16:57:32,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:57:32,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:57:32,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:57:32,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:57:32,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,652 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,691 INFO L138 Inliner]: procedures = 71, calls = 86, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 874 [2023-12-02 16:57:32,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:57:32,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:57:32,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:57:32,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:57:32,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,705 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,705 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,721 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,734 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:57:32,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:57:32,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:57:32,750 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:57:32,751 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (1/1) ... [2023-12-02 16:57:32,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:57:32,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:57:32,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:57:32,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:57:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:57:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 16:57:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 16:57:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 16:57:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 16:57:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 16:57:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 16:57:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 16:57:32,822 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 16:57:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 16:57:32,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 16:57:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 16:57:32,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 16:57:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 16:57:32,822 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 16:57:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 16:57:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 16:57:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 16:57:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 16:57:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 16:57:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 16:57:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 16:57:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 16:57:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:57:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 16:57:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 16:57:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 16:57:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 16:57:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:57:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:57:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 16:57:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 16:57:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-12-02 16:57:32,825 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-12-02 16:57:32,941 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:57:32,944 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:57:33,576 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-12-02 16:57:33,576 INFO L775 $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; [2023-12-02 16:57:33,641 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:57:34,039 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:57:34,039 INFO L309 CfgBuilder]: Removed 15 assume(true) statements. [2023-12-02 16:57:34,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:57:34 BoogieIcfgContainer [2023-12-02 16:57:34,041 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:57:34,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:57:34,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:57:34,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:57:34,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:57:32" (1/3) ... [2023-12-02 16:57:34,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d64294e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:57:34, skipping insertion in model container [2023-12-02 16:57:34,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:57:32" (2/3) ... [2023-12-02 16:57:34,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d64294e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:57:34, skipping insertion in model container [2023-12-02 16:57:34,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:57:34" (3/3) ... [2023-12-02 16:57:34,049 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-2.c [2023-12-02 16:57:34,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:57:34,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 16:57:34,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:57:34,129 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;@11e3a160, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:57:34,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 16:57:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 180 states have (on average 1.511111111111111) internal successors, (272), 188 states have internal predecessors, (272), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 16:57:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 16:57:34,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:34,147 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] [2023-12-02 16:57:34,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:34,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 508866165, now seen corresponding path program 1 times [2023-12-02 16:57:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744497431] [2023-12-02 16:57:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:57:34,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:34,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744497431] [2023-12-02 16:57:34,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744497431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:34,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:34,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:57:34,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665693427] [2023-12-02 16:57:34,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:34,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:57:34,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:57:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:57:34,508 INFO L87 Difference]: Start difference. First operand has 238 states, 180 states have (on average 1.511111111111111) internal successors, (272), 188 states have internal predecessors, (272), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) 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) [2023-12-02 16:57:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:34,943 INFO L93 Difference]: Finished difference Result 598 states and 882 transitions. [2023-12-02 16:57:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:57:34,945 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 [2023-12-02 16:57:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:34,959 INFO L225 Difference]: With dead ends: 598 [2023-12-02 16:57:34,959 INFO L226 Difference]: Without dead ends: 361 [2023-12-02 16:57:34,964 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 [2023-12-02 16:57:34,967 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 402 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:34,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 600 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:57:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-12-02 16:57:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 350. [2023-12-02 16:57:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 261 states have (on average 1.4252873563218391) internal successors, (372), 266 states have internal predecessors, (372), 60 states have call successors, (60), 29 states have call predecessors, (60), 27 states have return successors, (59), 56 states have call predecessors, (59), 56 states have call successors, (59) [2023-12-02 16:57:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 491 transitions. [2023-12-02 16:57:35,039 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 491 transitions. Word has length 44 [2023-12-02 16:57:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:35,040 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 491 transitions. [2023-12-02 16:57:35,040 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) [2023-12-02 16:57:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 491 transitions. [2023-12-02 16:57:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:57:35,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:35,043 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] [2023-12-02 16:57:35,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:57:35,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:35,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2085469140, now seen corresponding path program 1 times [2023-12-02 16:57:35,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:35,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098322338] [2023-12-02 16:57:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:57:35,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098322338] [2023-12-02 16:57:35,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098322338] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:35,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:35,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:57:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017222629] [2023-12-02 16:57:35,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:35,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:57:35,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:35,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:57:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:35,172 INFO L87 Difference]: Start difference. First operand 350 states and 491 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) [2023-12-02 16:57:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:36,054 INFO L93 Difference]: Finished difference Result 887 states and 1214 transitions. [2023-12-02 16:57:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:57:36,055 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 [2023-12-02 16:57:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:36,059 INFO L225 Difference]: With dead ends: 887 [2023-12-02 16:57:36,060 INFO L226 Difference]: Without dead ends: 421 [2023-12-02 16:57:36,062 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 [2023-12-02 16:57:36,063 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 876 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:36,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1008 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:57:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-12-02 16:57:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 336. [2023-12-02 16:57:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 247 states have (on average 1.3724696356275303) internal successors, (339), 252 states have internal predecessors, (339), 60 states have call successors, (60), 29 states have call predecessors, (60), 27 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-12-02 16:57:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 455 transitions. [2023-12-02 16:57:36,101 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 455 transitions. Word has length 45 [2023-12-02 16:57:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:36,102 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 455 transitions. [2023-12-02 16:57:36,102 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) [2023-12-02 16:57:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 455 transitions. [2023-12-02 16:57:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 16:57:36,104 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:36,104 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] [2023-12-02 16:57:36,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:57:36,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:36,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash 687843005, now seen corresponding path program 1 times [2023-12-02 16:57:36,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:36,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533765144] [2023-12-02 16:57:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:57:36,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:36,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533765144] [2023-12-02 16:57:36,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533765144] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:36,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:36,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:57:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504401326] [2023-12-02 16:57:36,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:36,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:57:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:57:36,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:36,201 INFO L87 Difference]: Start difference. First operand 336 states and 455 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) [2023-12-02 16:57:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:36,920 INFO L93 Difference]: Finished difference Result 802 states and 1063 transitions. [2023-12-02 16:57:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:57:36,920 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 [2023-12-02 16:57:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:36,925 INFO L225 Difference]: With dead ends: 802 [2023-12-02 16:57:36,926 INFO L226 Difference]: Without dead ends: 625 [2023-12-02 16:57:36,927 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 [2023-12-02 16:57:36,928 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 789 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:36,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 966 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:57:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-12-02 16:57:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 600. [2023-12-02 16:57:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 428 states have (on average 1.3037383177570094) internal successors, (558), 433 states have internal predecessors, (558), 109 states have call successors, (109), 63 states have call predecessors, (109), 61 states have return successors, (122), 105 states have call predecessors, (122), 105 states have call successors, (122) [2023-12-02 16:57:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 789 transitions. [2023-12-02 16:57:36,981 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 789 transitions. Word has length 46 [2023-12-02 16:57:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:36,981 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 789 transitions. [2023-12-02 16:57:36,982 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) [2023-12-02 16:57:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 789 transitions. [2023-12-02 16:57:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 16:57:36,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:36,984 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] [2023-12-02 16:57:36,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:57:36,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:36,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash -754396311, now seen corresponding path program 1 times [2023-12-02 16:57:36,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:36,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309177014] [2023-12-02 16:57:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:36,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:57:37,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309177014] [2023-12-02 16:57:37,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309177014] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:37,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:37,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:57:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804493388] [2023-12-02 16:57:37,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:37,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:57:37,036 INFO L87 Difference]: Start difference. First operand 600 states and 789 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) [2023-12-02 16:57:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:37,136 INFO L93 Difference]: Finished difference Result 601 states and 790 transitions. [2023-12-02 16:57:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:37,137 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 [2023-12-02 16:57:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:37,139 INFO L225 Difference]: With dead ends: 601 [2023-12-02 16:57:37,139 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 16:57:37,140 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 [2023-12-02 16:57:37,141 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 299 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:37,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 264 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 16:57:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-12-02 16:57:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 128 states have internal predecessors, (186), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-02 16:57:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 232 transitions. [2023-12-02 16:57:37,156 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 232 transitions. Word has length 50 [2023-12-02 16:57:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:37,156 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 232 transitions. [2023-12-02 16:57:37,157 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) [2023-12-02 16:57:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 232 transitions. [2023-12-02 16:57:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 16:57:37,158 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:37,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:37,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:57:37,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:37,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash -36869971, now seen corresponding path program 1 times [2023-12-02 16:57:37,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:37,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592318560] [2023-12-02 16:57:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:37,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:57:37,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:37,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592318560] [2023-12-02 16:57:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592318560] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:37,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:37,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:57:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596576645] [2023-12-02 16:57:37,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:57:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:57:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:57:37,281 INFO L87 Difference]: Start difference. First operand 157 states and 232 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:57:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:37,887 INFO L93 Difference]: Finished difference Result 870 states and 1364 transitions. [2023-12-02 16:57:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:57:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2023-12-02 16:57:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:37,894 INFO L225 Difference]: With dead ends: 870 [2023-12-02 16:57:37,895 INFO L226 Difference]: Without dead ends: 719 [2023-12-02 16:57:37,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:57:37,897 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1005 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:37,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 979 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:57:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2023-12-02 16:57:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2023-12-02 16:57:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 582 states have (on average 1.4673539518900343) internal successors, (854), 587 states have internal predecessors, (854), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (137), 88 states have call predecessors, (137), 91 states have call successors, (137) [2023-12-02 16:57:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1084 transitions. [2023-12-02 16:57:37,960 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1084 transitions. Word has length 56 [2023-12-02 16:57:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:37,960 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 1084 transitions. [2023-12-02 16:57:37,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:57:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1084 transitions. [2023-12-02 16:57:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 16:57:37,965 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:37,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:37,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:57:37,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:37,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:37,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1789824121, now seen corresponding path program 1 times [2023-12-02 16:57:37,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:37,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799801039] [2023-12-02 16:57:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:37,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:57:38,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799801039] [2023-12-02 16:57:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799801039] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:57:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565196603] [2023-12-02 16:57:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:38,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:57:38,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:57:38,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:57:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:38,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:57:38,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:57:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 16:57:38,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:57:38,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565196603] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:38,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:57:38,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:57:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872885662] [2023-12-02 16:57:38,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:38,474 INFO L87 Difference]: Start difference. First operand 706 states and 1084 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:38,653 INFO L93 Difference]: Finished difference Result 2090 states and 3298 transitions. [2023-12-02 16:57:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-12-02 16:57:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:38,664 INFO L225 Difference]: With dead ends: 2090 [2023-12-02 16:57:38,665 INFO L226 Difference]: Without dead ends: 1390 [2023-12-02 16:57:38,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:38,670 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 204 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:38,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 378 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:38,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2023-12-02 16:57:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1381. [2023-12-02 16:57:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1145 states have (on average 1.462008733624454) internal successors, (1674), 1153 states have internal predecessors, (1674), 175 states have call successors, (175), 61 states have call predecessors, (175), 60 states have return successors, (261), 167 states have call predecessors, (261), 173 states have call successors, (261) [2023-12-02 16:57:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2110 transitions. [2023-12-02 16:57:38,795 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2110 transitions. Word has length 110 [2023-12-02 16:57:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:38,795 INFO L495 AbstractCegarLoop]: Abstraction has 1381 states and 2110 transitions. [2023-12-02 16:57:38,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2110 transitions. [2023-12-02 16:57:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 16:57:38,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:38,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:38,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:57:39,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:39,001 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:39,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:39,002 INFO L85 PathProgramCache]: Analyzing trace with hash 878899737, now seen corresponding path program 1 times [2023-12-02 16:57:39,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:39,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169149096] [2023-12-02 16:57:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:57:39,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169149096] [2023-12-02 16:57:39,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169149096] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:57:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771429936] [2023-12-02 16:57:39,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:39,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:39,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:57:39,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:57:39,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:57:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:39,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:57:39,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:57:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:57:39,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:57:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771429936] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:39,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:57:39,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:57:39,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611964431] [2023-12-02 16:57:39,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:39,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:39,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:39,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:39,395 INFO L87 Difference]: Start difference. First operand 1381 states and 2110 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:39,665 INFO L93 Difference]: Finished difference Result 4100 states and 6432 transitions. [2023-12-02 16:57:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:39,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-12-02 16:57:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:39,686 INFO L225 Difference]: With dead ends: 4100 [2023-12-02 16:57:39,686 INFO L226 Difference]: Without dead ends: 2725 [2023-12-02 16:57:39,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:39,694 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 195 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:39,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 378 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2023-12-02 16:57:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2711. [2023-12-02 16:57:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2256 states have (on average 1.4556737588652482) internal successors, (3284), 2270 states have internal predecessors, (3284), 334 states have call successors, (334), 121 states have call predecessors, (334), 120 states have return successors, (500), 320 states have call predecessors, (500), 332 states have call successors, (500) [2023-12-02 16:57:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4118 transitions. [2023-12-02 16:57:39,910 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4118 transitions. Word has length 110 [2023-12-02 16:57:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:39,910 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 4118 transitions. [2023-12-02 16:57:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4118 transitions. [2023-12-02 16:57:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 16:57:39,917 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:39,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:39,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:57:40,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:40,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:40,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash 574077049, now seen corresponding path program 1 times [2023-12-02 16:57:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:40,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651312616] [2023-12-02 16:57:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:57:40,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651312616] [2023-12-02 16:57:40,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651312616] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:57:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196191823] [2023-12-02 16:57:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:57:40,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:57:40,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:57:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:40,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:57:40,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:57:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 16:57:40,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:57:40,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196191823] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:40,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:57:40,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:57:40,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902596609] [2023-12-02 16:57:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:40,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:40,463 INFO L87 Difference]: Start difference. First operand 2711 states and 4118 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:40,807 INFO L93 Difference]: Finished difference Result 8060 states and 12559 transitions. [2023-12-02 16:57:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-12-02 16:57:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:40,836 INFO L225 Difference]: With dead ends: 8060 [2023-12-02 16:57:40,836 INFO L226 Difference]: Without dead ends: 5355 [2023-12-02 16:57:40,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:40,848 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 201 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:40,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 373 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2023-12-02 16:57:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 5331. [2023-12-02 16:57:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 4448 states have (on average 1.4487410071942446) internal successors, (6444), 4474 states have internal predecessors, (6444), 642 states have call successors, (642), 241 states have call predecessors, (642), 240 states have return successors, (960), 616 states have call predecessors, (960), 640 states have call successors, (960) [2023-12-02 16:57:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 8046 transitions. [2023-12-02 16:57:41,151 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 8046 transitions. Word has length 110 [2023-12-02 16:57:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:41,152 INFO L495 AbstractCegarLoop]: Abstraction has 5331 states and 8046 transitions. [2023-12-02 16:57:41,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 8046 transitions. [2023-12-02 16:57:41,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 16:57:41,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:41,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:41,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:57:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 16:57:41,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:41,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1228289753, now seen corresponding path program 1 times [2023-12-02 16:57:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:41,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066734464] [2023-12-02 16:57:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:57:41,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066734464] [2023-12-02 16:57:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066734464] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:57:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597052595] [2023-12-02 16:57:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:41,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:57:41,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:57:41,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:57:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:41,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:57:41,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:57:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:57:41,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:57:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597052595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:41,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:57:41,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:57:41,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262394167] [2023-12-02 16:57:41,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:41,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:41,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:41,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:41,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:41,760 INFO L87 Difference]: Start difference. First operand 5331 states and 8046 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:42,450 INFO L93 Difference]: Finished difference Result 15860 states and 24531 transitions. [2023-12-02 16:57:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-12-02 16:57:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:42,528 INFO L225 Difference]: With dead ends: 15860 [2023-12-02 16:57:42,528 INFO L226 Difference]: Without dead ends: 10535 [2023-12-02 16:57:42,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:57:42,554 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 189 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:42,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 373 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2023-12-02 16:57:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 10491. [2023-12-02 16:57:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10491 states, 8772 states have (on average 1.44140446876425) internal successors, (12644), 8822 states have internal predecessors, (12644), 1238 states have call successors, (1238), 481 states have call predecessors, (1238), 480 states have return successors, (1844), 1188 states have call predecessors, (1844), 1236 states have call successors, (1844) [2023-12-02 16:57:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10491 states to 10491 states and 15726 transitions. [2023-12-02 16:57:43,118 INFO L78 Accepts]: Start accepts. Automaton has 10491 states and 15726 transitions. Word has length 110 [2023-12-02 16:57:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:43,119 INFO L495 AbstractCegarLoop]: Abstraction has 10491 states and 15726 transitions. [2023-12-02 16:57:43,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:57:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10491 states and 15726 transitions. [2023-12-02 16:57:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 16:57:43,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:43,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:43,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:57:43,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:57:43,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:43,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1312245049, now seen corresponding path program 1 times [2023-12-02 16:57:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:43,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253945511] [2023-12-02 16:57:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:57:43,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:43,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253945511] [2023-12-02 16:57:43,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253945511] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:43,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:43,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:57:43,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745438615] [2023-12-02 16:57:43,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:43,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:43,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:43,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:57:43,432 INFO L87 Difference]: Start difference. First operand 10491 states and 15726 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:57:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:44,334 INFO L93 Difference]: Finished difference Result 21407 states and 32753 transitions. [2023-12-02 16:57:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:44,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2023-12-02 16:57:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:44,413 INFO L225 Difference]: With dead ends: 21407 [2023-12-02 16:57:44,413 INFO L226 Difference]: Without dead ends: 12987 [2023-12-02 16:57:44,447 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 [2023-12-02 16:57:44,448 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 100 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:44,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 496 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2023-12-02 16:57:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12203. [2023-12-02 16:57:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12203 states, 10420 states have (on average 1.4667946257197697) internal successors, (15284), 10470 states have internal predecessors, (15284), 1270 states have call successors, (1270), 513 states have call predecessors, (1270), 512 states have return successors, (1876), 1220 states have call predecessors, (1876), 1268 states have call successors, (1876) [2023-12-02 16:57:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12203 states to 12203 states and 18430 transitions. [2023-12-02 16:57:45,326 INFO L78 Accepts]: Start accepts. Automaton has 12203 states and 18430 transitions. Word has length 110 [2023-12-02 16:57:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:45,327 INFO L495 AbstractCegarLoop]: Abstraction has 12203 states and 18430 transitions. [2023-12-02 16:57:45,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:57:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12203 states and 18430 transitions. [2023-12-02 16:57:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 16:57:45,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:45,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:45,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:57:45,367 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:45,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:45,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1741151375, now seen corresponding path program 1 times [2023-12-02 16:57:45,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:45,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081181475] [2023-12-02 16:57:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:45,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 16:57:45,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:45,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081181475] [2023-12-02 16:57:45,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081181475] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:45,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:45,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:57:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584858781] [2023-12-02 16:57:45,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:57:45,466 INFO L87 Difference]: Start difference. First operand 12203 states and 18430 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:57:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:46,574 INFO L93 Difference]: Finished difference Result 36244 states and 55799 transitions. [2023-12-02 16:57:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:46,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-12-02 16:57:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:46,651 INFO L225 Difference]: With dead ends: 36244 [2023-12-02 16:57:46,651 INFO L226 Difference]: Without dead ends: 24047 [2023-12-02 16:57:46,683 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 [2023-12-02 16:57:46,683 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 194 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:46,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 375 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24047 states. [2023-12-02 16:57:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24047 to 23931. [2023-12-02 16:57:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23931 states, 20452 states have (on average 1.456874633287698) internal successors, (29796), 20550 states have internal predecessors, (29796), 2454 states have call successors, (2454), 1025 states have call predecessors, (2454), 1024 states have return successors, (3604), 2356 states have call predecessors, (3604), 2452 states have call successors, (3604) [2023-12-02 16:57:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23931 states to 23931 states and 35854 transitions. [2023-12-02 16:57:47,833 INFO L78 Accepts]: Start accepts. Automaton has 23931 states and 35854 transitions. Word has length 149 [2023-12-02 16:57:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:47,834 INFO L495 AbstractCegarLoop]: Abstraction has 23931 states and 35854 transitions. [2023-12-02 16:57:47,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:57:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 23931 states and 35854 transitions. [2023-12-02 16:57:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 16:57:47,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:47,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:47,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:57:47,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:47,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash -351916153, now seen corresponding path program 1 times [2023-12-02 16:57:47,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:47,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016749839] [2023-12-02 16:57:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 16:57:48,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016749839] [2023-12-02 16:57:48,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016749839] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:48,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:48,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:57:48,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416814527] [2023-12-02 16:57:48,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:48,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:48,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:57:48,050 INFO L87 Difference]: Start difference. First operand 23931 states and 35854 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:57:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:49,712 INFO L93 Difference]: Finished difference Result 71076 states and 108455 transitions. [2023-12-02 16:57:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-12-02 16:57:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:49,855 INFO L225 Difference]: With dead ends: 71076 [2023-12-02 16:57:49,855 INFO L226 Difference]: Without dead ends: 47151 [2023-12-02 16:57:49,906 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 [2023-12-02 16:57:49,906 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 196 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:49,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 380 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47151 states. [2023-12-02 16:57:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47151 to 46923. [2023-12-02 16:57:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46923 states, 40132 states have (on average 1.4465264626731784) internal successors, (58052), 40326 states have internal predecessors, (58052), 4742 states have call successors, (4742), 2049 states have call predecessors, (4742), 2048 states have return successors, (6916), 4548 states have call predecessors, (6916), 4740 states have call successors, (6916) [2023-12-02 16:57:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46923 states to 46923 states and 69710 transitions. [2023-12-02 16:57:52,473 INFO L78 Accepts]: Start accepts. Automaton has 46923 states and 69710 transitions. Word has length 149 [2023-12-02 16:57:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:57:52,473 INFO L495 AbstractCegarLoop]: Abstraction has 46923 states and 69710 transitions. [2023-12-02 16:57:52,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:57:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 46923 states and 69710 transitions. [2023-12-02 16:57:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 16:57:52,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:57:52,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:57:52,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 16:57:52,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:57:52,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:57:52,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1027405976, now seen corresponding path program 1 times [2023-12-02 16:57:52,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:57:52,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355338579] [2023-12-02 16:57:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:57:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:57:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:57:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 16:57:52,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:57:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355338579] [2023-12-02 16:57:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355338579] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:57:52,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:57:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:57:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431669577] [2023-12-02 16:57:52,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:57:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:57:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:57:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:57:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:57:52,637 INFO L87 Difference]: Start difference. First operand 46923 states and 69710 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:57:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:57:56,256 INFO L93 Difference]: Finished difference Result 139348 states and 210647 transitions. [2023-12-02 16:57:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:57:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-12-02 16:57:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:57:56,517 INFO L225 Difference]: With dead ends: 139348 [2023-12-02 16:57:56,517 INFO L226 Difference]: Without dead ends: 92431 [2023-12-02 16:57:56,625 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 [2023-12-02 16:57:56,625 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 199 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:57:56,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 389 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:57:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92431 states. [2023-12-02 16:58:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92431 to 91979. [2023-12-02 16:58:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91979 states, 78724 states have (on average 1.4357502159443118) internal successors, (113028), 79110 states have internal predecessors, (113028), 9158 states have call successors, (9158), 4097 states have call predecessors, (9158), 4096 states have return successors, (13252), 8772 states have call predecessors, (13252), 9156 states have call successors, (13252) [2023-12-02 16:58:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91979 states to 91979 states and 135438 transitions. [2023-12-02 16:58:01,292 INFO L78 Accepts]: Start accepts. Automaton has 91979 states and 135438 transitions. Word has length 149 [2023-12-02 16:58:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:01,293 INFO L495 AbstractCegarLoop]: Abstraction has 91979 states and 135438 transitions. [2023-12-02 16:58:01,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:58:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 91979 states and 135438 transitions. [2023-12-02 16:58:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-02 16:58:01,478 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:01,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:58:01,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:58:01,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:01,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:01,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1613838141, now seen corresponding path program 1 times [2023-12-02 16:58:01,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:01,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388939854] [2023-12-02 16:58:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 16:58:01,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:01,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388939854] [2023-12-02 16:58:01,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388939854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:58:01,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353324096] [2023-12-02 16:58:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:01,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:58:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:58:01,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:58:01,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:58:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:02,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:58:02,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:58:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 16:58:02,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:58:02,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353324096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:02,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:58:02,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 16:58:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967986341] [2023-12-02 16:58:02,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:58:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:02,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:58:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:58:02,120 INFO L87 Difference]: Start difference. First operand 91979 states and 135438 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:58:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:06,941 INFO L93 Difference]: Finished difference Result 169288 states and 249029 transitions. [2023-12-02 16:58:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:58:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2023-12-02 16:58:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:07,270 INFO L225 Difference]: With dead ends: 169288 [2023-12-02 16:58:07,270 INFO L226 Difference]: Without dead ends: 115204 [2023-12-02 16:58:07,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:58:07,434 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 199 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:07,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 269 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:58:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115204 states. [2023-12-02 16:58:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115204 to 115204. [2023-12-02 16:58:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115204 states, 100034 states have (on average 1.3979446988024071) internal successors, (139842), 100420 states have internal predecessors, (139842), 9795 states have call successors, (9795), 5374 states have call predecessors, (9795), 5374 states have return successors, (14399), 9410 states have call predecessors, (14399), 9793 states have call successors, (14399) [2023-12-02 16:58:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115204 states to 115204 states and 164036 transitions. [2023-12-02 16:58:12,106 INFO L78 Accepts]: Start accepts. Automaton has 115204 states and 164036 transitions. Word has length 172 [2023-12-02 16:58:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:12,106 INFO L495 AbstractCegarLoop]: Abstraction has 115204 states and 164036 transitions. [2023-12-02 16:58:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:58:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 115204 states and 164036 transitions. [2023-12-02 16:58:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-02 16:58:12,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:12,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:58:12,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:58:12,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:58:12,500 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:12,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash 284692164, now seen corresponding path program 1 times [2023-12-02 16:58:12,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:12,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479468249] [2023-12-02 16:58:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:12,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 16:58:12,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479468249] [2023-12-02 16:58:12,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479468249] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:58:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921189057] [2023-12-02 16:58:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:12,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:58:12,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:58:12,982 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:58:12,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:58:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:13,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:58:13,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:58:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 16:58:13,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:58:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921189057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:58:13,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:58:13,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 16:58:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345211345] [2023-12-02 16:58:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:58:13,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:58:13,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:58:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:58:13,258 INFO L87 Difference]: Start difference. First operand 115204 states and 164036 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:58:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:58:18,901 INFO L93 Difference]: Finished difference Result 232067 states and 337659 transitions. [2023-12-02 16:58:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:58:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2023-12-02 16:58:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:58:19,319 INFO L225 Difference]: With dead ends: 232067 [2023-12-02 16:58:19,319 INFO L226 Difference]: Without dead ends: 163968 [2023-12-02 16:58:19,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:58:19,435 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 209 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:58:19,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 558 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:58:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163968 states. [2023-12-02 16:58:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163968 to 162044. [2023-12-02 16:58:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162044 states, 140863 states have (on average 1.394368996826704) internal successors, (196415), 141377 states have internal predecessors, (196415), 13633 states have call successors, (13633), 7548 states have call predecessors, (13633), 7547 states have return successors, (22456), 13119 states have call predecessors, (22456), 13631 states have call successors, (22456) [2023-12-02 16:58:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162044 states to 162044 states and 232504 transitions. [2023-12-02 16:58:26,372 INFO L78 Accepts]: Start accepts. Automaton has 162044 states and 232504 transitions. Word has length 172 [2023-12-02 16:58:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:58:26,373 INFO L495 AbstractCegarLoop]: Abstraction has 162044 states and 232504 transitions. [2023-12-02 16:58:26,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:58:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 162044 states and 232504 transitions. [2023-12-02 16:58:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 16:58:26,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:58:26,540 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:58:26,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:58:26,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 16:58:26,741 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:58:26,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:58:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1937809606, now seen corresponding path program 1 times [2023-12-02 16:58:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:58:26,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510515859] [2023-12-02 16:58:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:58:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 16:58:27,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510515859] [2023-12-02 16:58:27,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510515859] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:58:27,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583395856] [2023-12-02 16:58:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:58:27,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:58:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:58:27,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:58:27,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:58:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:58:27,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 16:58:27,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:58:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:58:28,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:58:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 16:58:28,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583395856] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:58:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706876730] [2023-12-02 16:58:28,530 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-12-02 16:58:28,530 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:58:28,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:58:28,539 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:58:28,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:05,032 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 99 for LOIs [2023-12-02 16:59:05,050 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 218 for LOIs [2023-12-02 16:59:05,433 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 16:59:05,465 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 194 for LOIs [2023-12-02 16:59:05,732 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 147 for LOIs [2023-12-02 16:59:07,404 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 157 for LOIs [2023-12-02 16:59:08,843 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 104 for LOIs [2023-12-02 16:59:08,930 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:33,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1402960#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= ~t1_i~0 1) (= ~slow_clk_edge~0 0) (= 0 ~t7_pc~0) (= ~p_last_write~0 0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t6_pc~0) (= 0 ~t3_pc~0) (= ~q_req_up~0 0) (= ~t8_i~0 1) (= ~fast_clk_edge~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= ~t~0 0) (= ~t6_i~0 1) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_5| 0)) (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_BEFORE_CALL_5| 2147483647))) (= ~p_dw_st~0 0) (= ~t7_i~0 1) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= ~t5_i~0 1) (= ~a_t~0 0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (not (= ~token~0 (+ 8 ~local~0))) (= ~t4_i~0 1))' at error location [2023-12-02 16:59:33,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:59:33,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:59:33,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 16:59:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335756302] [2023-12-02 16:59:33,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:59:33,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:59:33,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:59:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=6990, Unknown=0, NotChecked=0, Total=7656 [2023-12-02 16:59:33,029 INFO L87 Difference]: Start difference. First operand 162044 states and 232504 transitions. Second operand has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (36), 7 states have call predecessors, (36), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 16:59:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:46,102 INFO L93 Difference]: Finished difference Result 516962 states and 738826 transitions. [2023-12-02 16:59:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 16:59:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (36), 7 states have call predecessors, (36), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 169 [2023-12-02 16:59:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:47,135 INFO L225 Difference]: With dead ends: 516962 [2023-12-02 16:59:47,135 INFO L226 Difference]: Without dead ends: 354925 [2023-12-02 16:59:47,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 439 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4936 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=1096, Invalid=11336, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 16:59:47,418 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 2916 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2916 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:47,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2916 Valid, 1227 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:59:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354925 states. [2023-12-02 17:00:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354925 to 310241. [2023-12-02 17:00:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310241 states, 269750 states have (on average 1.3805597775718257) internal successors, (372406), 270712 states have internal predecessors, (372406), 25912 states have call successors, (25912), 14579 states have call predecessors, (25912), 14578 states have return successors, (40486), 24950 states have call predecessors, (40486), 25910 states have call successors, (40486) [2023-12-02 17:00:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310241 states to 310241 states and 438804 transitions. [2023-12-02 17:00:04,260 INFO L78 Accepts]: Start accepts. Automaton has 310241 states and 438804 transitions. Word has length 169 [2023-12-02 17:00:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:04,261 INFO L495 AbstractCegarLoop]: Abstraction has 310241 states and 438804 transitions. [2023-12-02 17:00:04,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (36), 7 states have call predecessors, (36), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 17:00:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 310241 states and 438804 transitions. [2023-12-02 17:00:05,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-12-02 17:00:05,057 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:05,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:00:05,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:00:05,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 17:00:05,258 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:05,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:05,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2132089207, now seen corresponding path program 1 times [2023-12-02 17:00:05,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:05,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785766378] [2023-12-02 17:00:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:05,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:00:05,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:05,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785766378] [2023-12-02 17:00:05,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785766378] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:05,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028089680] [2023-12-02 17:00:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:05,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:05,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:05,576 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:05,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:00:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:05,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:00:05,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:00:05,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028089680] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:05,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:00:05,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 17:00:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153829188] [2023-12-02 17:00:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:05,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:00:05,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:00:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:00:05,886 INFO L87 Difference]: Start difference. First operand 310241 states and 438804 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:00:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:19,030 INFO L93 Difference]: Finished difference Result 463042 states and 649465 transitions. [2023-12-02 17:00:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:00:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 177 [2023-12-02 17:00:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:20,037 INFO L225 Difference]: With dead ends: 463042 [2023-12-02 17:00:20,037 INFO L226 Difference]: Without dead ends: 322506 [2023-12-02 17:00:20,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:00:20,233 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 185 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:20,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 755 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322506 states. [2023-12-02 17:00:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322506 to 321306. [2023-12-02 17:00:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321306 states, 280034 states have (on average 1.3766471214209703) internal successors, (385508), 281380 states have internal predecessors, (385508), 25920 states have call successors, (25920), 14584 states have call predecessors, (25920), 15351 states have return successors, (41646), 25342 states have call predecessors, (41646), 25918 states have call successors, (41646) [2023-12-02 17:00:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321306 states to 321306 states and 453074 transitions. [2023-12-02 17:00:35,718 INFO L78 Accepts]: Start accepts. Automaton has 321306 states and 453074 transitions. Word has length 177 [2023-12-02 17:00:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:35,719 INFO L495 AbstractCegarLoop]: Abstraction has 321306 states and 453074 transitions. [2023-12-02 17:00:35,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:00:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 321306 states and 453074 transitions. [2023-12-02 17:00:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-12-02 17:00:36,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:36,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:00:36,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:00:36,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:36,648 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:36,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:36,648 INFO L85 PathProgramCache]: Analyzing trace with hash 303202489, now seen corresponding path program 1 times [2023-12-02 17:00:36,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:36,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329182328] [2023-12-02 17:00:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 17:00:37,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:00:37,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329182328] [2023-12-02 17:00:37,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329182328] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:00:37,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196993507] [2023-12-02 17:00:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:37,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:37,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:37,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:37,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd68f04a-c613-4e31-a576-dfbfa127e3a2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:00:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:37,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:00:37,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:00:37,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:37,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196993507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:37,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:00:37,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:00:37,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266854779] [2023-12-02 17:00:37,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:37,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:00:37,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:00:37,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:00:37,330 INFO L87 Difference]: Start difference. First operand 321306 states and 453074 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:00:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:54,412 INFO L93 Difference]: Finished difference Result 619972 states and 884348 transitions. [2023-12-02 17:00:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:00:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 177 [2023-12-02 17:00:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:55,951 INFO L225 Difference]: With dead ends: 619972 [2023-12-02 17:00:55,951 INFO L226 Difference]: Without dead ends: 456880 [2023-12-02 17:00:56,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:00:56,300 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 155 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:56,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 538 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456880 states.