./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:59:13,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:59:13,599 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:59:13,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:59:13,606 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:59:13,637 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:59:13,638 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:59:13,638 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:59:13,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:59:13,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:59:13,639 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:59:13,639 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:59:13,639 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:59:13,640 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:59:13,640 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:59:13,640 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:59:13,640 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:59:13,640 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:59:13,640 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:59:13,641 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:59:13,641 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:59:13,641 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:59:13,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:59:13,641 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:59:13,642 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:59:13,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:59:13,642 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:59:13,642 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:59:13,642 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:59:13,642 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:59:13,642 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:59:13,643 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:59:13,643 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:59:13,643 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:59:13,643 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:59:13,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:59:13,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:59:13,644 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 [2024-11-14 02:59:13,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:59:13,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:59:13,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:59:13,937 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:59:13,937 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:59:13,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c Unable to find full path for "g++" [2024-11-14 02:59:15,780 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:59:16,154 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:59:16,158 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2024-11-14 02:59:16,174 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/data/c5a078306/473ac713f39a40e8b317ca01a2bca0c7/FLAG60e0e5d14 [2024-11-14 02:59:16,189 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/data/c5a078306/473ac713f39a40e8b317ca01a2bca0c7 [2024-11-14 02:59:16,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:59:16,193 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:59:16,196 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:59:16,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:59:16,202 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:59:16,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:16,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7970ab52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16, skipping insertion in model container [2024-11-14 02:59:16,206 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:16,272 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:59:16,466 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2024-11-14 02:59:16,541 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2024-11-14 02:59:16,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:59:16,778 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:59:16,793 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2024-11-14 02:59:16,824 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2024-11-14 02:59:16,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:59:16,912 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:59:16,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16 WrapperNode [2024-11-14 02:59:16,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:59:16,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:59:16,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:59:16,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:59:16,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:16,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:16,980 INFO L138 Inliner]: procedures = 74, calls = 87, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1123 [2024-11-14 02:59:16,981 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:59:16,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:59:16,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:59:16,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:59:16,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:16,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:16,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:16,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:17,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:17,029 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:17,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:17,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:17,042 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:59:17,043 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:59:17,043 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:59:17,043 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:59:17,044 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (1/1) ... [2024-11-14 02:59:17,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:59:17,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:17,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:59:17,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:59:17,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:59:17,112 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 02:59:17,112 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 02:59:17,112 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-14 02:59:17,112 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-14 02:59:17,112 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 02:59:17,112 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 02:59:17,112 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 02:59:17,112 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 02:59:17,112 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 02:59:17,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 02:59:17,113 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 02:59:17,113 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 02:59:17,113 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 02:59:17,113 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 02:59:17,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:59:17,113 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 02:59:17,113 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 02:59:17,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:59:17,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:59:17,113 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 02:59:17,114 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 02:59:17,282 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:59:17,285 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:59:18,701 INFO L? ?]: Removed 133 outVars from TransFormulas that were not future-live. [2024-11-14 02:59:18,702 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:59:19,548 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:59:19,548 INFO L316 CfgBuilder]: Removed 20 assume(true) statements. [2024-11-14 02:59:19,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:59:19 BoogieIcfgContainer [2024-11-14 02:59:19,548 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:59:19,555 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:59:19,555 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:59:19,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:59:19,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:59:16" (1/3) ... [2024-11-14 02:59:19,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e2abef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:59:19, skipping insertion in model container [2024-11-14 02:59:19,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:59:16" (2/3) ... [2024-11-14 02:59:19,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e2abef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:59:19, skipping insertion in model container [2024-11-14 02:59:19,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:59:19" (3/3) ... [2024-11-14 02:59:19,565 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2024-11-14 02:59:19,585 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:59:19,587 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_1.cil-2+token_ring.13.cil-2.c that has 10 procedures, 264 locations, 1 initial locations, 20 loop locations, and 2 error locations. [2024-11-14 02:59:19,682 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:59:19,701 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7ec30fd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:59:19,701 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 02:59:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 219 states have (on average 1.5296803652968036) internal successors, (335), 224 states have internal predecessors, (335), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-14 02:59:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 02:59:19,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:19,719 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:19,719 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:19,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:19,727 INFO L85 PathProgramCache]: Analyzing trace with hash -258008434, now seen corresponding path program 1 times [2024-11-14 02:59:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:19,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352381232] [2024-11-14 02:59:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:20,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:20,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352381232] [2024-11-14 02:59:20,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352381232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:20,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:20,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:59:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124796019] [2024-11-14 02:59:20,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:20,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:59:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:20,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:59:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:20,229 INFO L87 Difference]: Start difference. First operand has 264 states, 219 states have (on average 1.5296803652968036) internal successors, (335), 224 states have internal predecessors, (335), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:59:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:20,566 INFO L93 Difference]: Finished difference Result 561 states and 850 transitions. [2024-11-14 02:59:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:59:20,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-14 02:59:20,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:20,585 INFO L225 Difference]: With dead ends: 561 [2024-11-14 02:59:20,585 INFO L226 Difference]: Without dead ends: 297 [2024-11-14 02:59:20,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:20,595 INFO L432 NwaCegarLoop]: 339 mSDtfsCounter, 368 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:20,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 394 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:59:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-14 02:59:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2024-11-14 02:59:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 245 states have (on average 1.4775510204081632) internal successors, (362), 248 states have internal predecessors, (362), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-14 02:59:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 432 transitions. [2024-11-14 02:59:20,668 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 432 transitions. Word has length 28 [2024-11-14 02:59:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:20,669 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 432 transitions. [2024-11-14 02:59:20,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:59:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 432 transitions. [2024-11-14 02:59:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 02:59:20,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:20,672 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:20,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:59:20,672 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:20,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:20,673 INFO L85 PathProgramCache]: Analyzing trace with hash -906024190, now seen corresponding path program 1 times [2024-11-14 02:59:20,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:20,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213925964] [2024-11-14 02:59:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:20,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:20,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:20,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213925964] [2024-11-14 02:59:20,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213925964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:20,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:20,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:59:20,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915742600] [2024-11-14 02:59:20,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:20,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:59:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:20,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:59:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:20,791 INFO L87 Difference]: Start difference. First operand 293 states and 432 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:59:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:21,006 INFO L93 Difference]: Finished difference Result 449 states and 649 transitions. [2024-11-14 02:59:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:59:21,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-14 02:59:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:21,013 INFO L225 Difference]: With dead ends: 449 [2024-11-14 02:59:21,013 INFO L226 Difference]: Without dead ends: 368 [2024-11-14 02:59:21,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:21,015 INFO L432 NwaCegarLoop]: 325 mSDtfsCounter, 366 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:21,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 378 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:59:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-14 02:59:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2024-11-14 02:59:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 305 states have (on average 1.4524590163934425) internal successors, (443), 308 states have internal predecessors, (443), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-14 02:59:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 527 transitions. [2024-11-14 02:59:21,059 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 527 transitions. Word has length 29 [2024-11-14 02:59:21,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:21,059 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 527 transitions. [2024-11-14 02:59:21,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:59:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 527 transitions. [2024-11-14 02:59:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 02:59:21,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:21,067 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:21,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:59:21,068 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:21,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash 96193931, now seen corresponding path program 1 times [2024-11-14 02:59:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121775732] [2024-11-14 02:59:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:21,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:21,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121775732] [2024-11-14 02:59:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121775732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:21,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:59:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291039332] [2024-11-14 02:59:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:21,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:59:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:59:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:21,178 INFO L87 Difference]: Start difference. First operand 364 states and 527 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:59:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:21,387 INFO L93 Difference]: Finished difference Result 604 states and 855 transitions. [2024-11-14 02:59:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:59:21,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-14 02:59:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:21,391 INFO L225 Difference]: With dead ends: 604 [2024-11-14 02:59:21,392 INFO L226 Difference]: Without dead ends: 452 [2024-11-14 02:59:21,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:21,393 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 46 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:21,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 647 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:59:21,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-11-14 02:59:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2024-11-14 02:59:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 368 states have (on average 1.434782608695652) internal successors, (528), 373 states have internal predecessors, (528), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-14 02:59:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 624 transitions. [2024-11-14 02:59:21,442 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 624 transitions. Word has length 30 [2024-11-14 02:59:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:21,442 INFO L471 AbstractCegarLoop]: Abstraction has 438 states and 624 transitions. [2024-11-14 02:59:21,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:59:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 624 transitions. [2024-11-14 02:59:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 02:59:21,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:21,445 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:21,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:59:21,445 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:21,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:21,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1948237377, now seen corresponding path program 1 times [2024-11-14 02:59:21,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:21,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311069262] [2024-11-14 02:59:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:21,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:59:21,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:21,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311069262] [2024-11-14 02:59:21,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311069262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:21,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:21,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:59:21,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984042149] [2024-11-14 02:59:21,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:21,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:59:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:21,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:59:21,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:21,575 INFO L87 Difference]: Start difference. First operand 438 states and 624 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:59:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:21,796 INFO L93 Difference]: Finished difference Result 601 states and 842 transitions. [2024-11-14 02:59:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:59:21,797 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-14 02:59:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:21,803 INFO L225 Difference]: With dead ends: 601 [2024-11-14 02:59:21,803 INFO L226 Difference]: Without dead ends: 443 [2024-11-14 02:59:21,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:21,806 INFO L432 NwaCegarLoop]: 358 mSDtfsCounter, 32 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:21,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 681 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:59:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2024-11-14 02:59:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 432. [2024-11-14 02:59:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 362 states have (on average 1.419889502762431) internal successors, (514), 367 states have internal predecessors, (514), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-14 02:59:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 610 transitions. [2024-11-14 02:59:21,866 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 610 transitions. Word has length 43 [2024-11-14 02:59:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:21,867 INFO L471 AbstractCegarLoop]: Abstraction has 432 states and 610 transitions. [2024-11-14 02:59:21,867 INFO L472 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:59:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 610 transitions. [2024-11-14 02:59:21,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 02:59:21,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:21,874 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:21,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 02:59:21,874 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:21,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash -730861520, now seen corresponding path program 1 times [2024-11-14 02:59:21,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:21,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476374841] [2024-11-14 02:59:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:59:21,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:21,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476374841] [2024-11-14 02:59:21,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476374841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:21,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:59:21,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721015318] [2024-11-14 02:59:21,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:21,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:59:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:21,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:59:21,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:21,992 INFO L87 Difference]: Start difference. First operand 432 states and 610 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 02:59:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:22,218 INFO L93 Difference]: Finished difference Result 681 states and 934 transitions. [2024-11-14 02:59:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:59:22,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-14 02:59:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:22,223 INFO L225 Difference]: With dead ends: 681 [2024-11-14 02:59:22,223 INFO L226 Difference]: Without dead ends: 478 [2024-11-14 02:59:22,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:59:22,224 INFO L432 NwaCegarLoop]: 325 mSDtfsCounter, 352 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:22,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 377 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:59:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2024-11-14 02:59:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2024-11-14 02:59:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 401 states have (on average 1.3890274314214464) internal successors, (557), 406 states have internal predecessors, (557), 53 states have call successors, (53), 23 states have call predecessors, (53), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2024-11-14 02:59:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 661 transitions. [2024-11-14 02:59:22,277 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 661 transitions. Word has length 46 [2024-11-14 02:59:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:22,278 INFO L471 AbstractCegarLoop]: Abstraction has 478 states and 661 transitions. [2024-11-14 02:59:22,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 02:59:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 661 transitions. [2024-11-14 02:59:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 02:59:22,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:22,280 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 02:59:22,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 02:59:22,280 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:22,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 75675906, now seen corresponding path program 1 times [2024-11-14 02:59:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960911712] [2024-11-14 02:59:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:59:22,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:22,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960911712] [2024-11-14 02:59:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960911712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:59:22,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:59:22,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:59:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88728067] [2024-11-14 02:59:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:59:22,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:59:22,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:59:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:59:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:59:22,480 INFO L87 Difference]: Start difference. First operand 478 states and 661 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:59:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:22,914 INFO L93 Difference]: Finished difference Result 518 states and 708 transitions. [2024-11-14 02:59:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:59:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-14 02:59:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:22,918 INFO L225 Difference]: With dead ends: 518 [2024-11-14 02:59:22,918 INFO L226 Difference]: Without dead ends: 515 [2024-11-14 02:59:22,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:59:22,922 INFO L432 NwaCegarLoop]: 335 mSDtfsCounter, 644 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:22,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 376 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:59:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-11-14 02:59:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 477. [2024-11-14 02:59:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 401 states have (on average 1.3840399002493766) internal successors, (555), 405 states have internal predecessors, (555), 52 states have call successors, (52), 23 states have call predecessors, (52), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2024-11-14 02:59:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 658 transitions. [2024-11-14 02:59:22,989 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 658 transitions. Word has length 47 [2024-11-14 02:59:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:22,989 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 658 transitions. [2024-11-14 02:59:22,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 02:59:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 658 transitions. [2024-11-14 02:59:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 02:59:22,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:22,991 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:22,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 02:59:22,991 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:22,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1950478831, now seen corresponding path program 1 times [2024-11-14 02:59:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035579486] [2024-11-14 02:59:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:59:23,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:59:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035579486] [2024-11-14 02:59:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035579486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:59:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892817615] [2024-11-14 02:59:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:23,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:59:23,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:59:23,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:59:23,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:59:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:59:23,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 02:59:23,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:59:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:59:23,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:59:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:59:23,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892817615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:59:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465079857] [2024-11-14 02:59:23,882 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-14 02:59:23,882 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:59:23,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:59:23,892 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:59:23,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:59:32,819 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 191 for LOIs [2024-11-14 02:59:32,892 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 216 for LOIs [2024-11-14 02:59:32,978 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 216 for LOIs [2024-11-14 02:59:34,199 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:00:01,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8195#(and (= ~E_12~0 2) (= ~T6_E~0 2) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_11| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 2147483647))) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~q_buf_0~0 0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (not (= ~p_num_write~0 1)) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= ~p_last_write~0 0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~q_write_ev~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0))' at error location [2024-11-14 03:00:01,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:00:01,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:00:01,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2024-11-14 03:00:01,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968070489] [2024-11-14 03:00:01,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:00:01,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:00:01,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:00:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:00:01,231 INFO L87 Difference]: Start difference. First operand 477 states and 658 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 03:00:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:01,813 INFO L93 Difference]: Finished difference Result 920 states and 1226 transitions. [2024-11-14 03:00:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:00:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2024-11-14 03:00:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:01,821 INFO L225 Difference]: With dead ends: 920 [2024-11-14 03:00:01,821 INFO L226 Difference]: Without dead ends: 917 [2024-11-14 03:00:01,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:00:01,824 INFO L432 NwaCegarLoop]: 381 mSDtfsCounter, 771 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:01,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 1334 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:00:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2024-11-14 03:00:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 686. [2024-11-14 03:00:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 578 states have (on average 1.3633217993079585) internal successors, (788), 584 states have internal predecessors, (788), 71 states have call successors, (71), 36 states have call predecessors, (71), 35 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2024-11-14 03:00:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 929 transitions. [2024-11-14 03:00:01,880 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 929 transitions. Word has length 48 [2024-11-14 03:00:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:01,881 INFO L471 AbstractCegarLoop]: Abstraction has 686 states and 929 transitions. [2024-11-14 03:00:01,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 03:00:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 929 transitions. [2024-11-14 03:00:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 03:00:01,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:01,883 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-14 03:00:01,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:00:02,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:02,084 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:02,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 640863039, now seen corresponding path program 2 times [2024-11-14 03:00:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:02,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733848727] [2024-11-14 03:00:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 03:00:02,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:02,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733848727] [2024-11-14 03:00:02,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733848727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:02,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:00:02,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:00:02,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102921205] [2024-11-14 03:00:02,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:02,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:02,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:02,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:02,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:00:02,172 INFO L87 Difference]: Start difference. First operand 686 states and 929 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:00:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:02,319 INFO L93 Difference]: Finished difference Result 1016 states and 1362 transitions. [2024-11-14 03:00:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2024-11-14 03:00:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:02,324 INFO L225 Difference]: With dead ends: 1016 [2024-11-14 03:00:02,324 INFO L226 Difference]: Without dead ends: 628 [2024-11-14 03:00:02,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:00:02,326 INFO L432 NwaCegarLoop]: 348 mSDtfsCounter, 365 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:02,326 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 393 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:00:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2024-11-14 03:00:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 619. [2024-11-14 03:00:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 521 states have (on average 1.3570057581573896) internal successors, (707), 528 states have internal predecessors, (707), 65 states have call successors, (65), 32 states have call predecessors, (65), 31 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2024-11-14 03:00:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 836 transitions. [2024-11-14 03:00:02,381 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 836 transitions. Word has length 61 [2024-11-14 03:00:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:02,381 INFO L471 AbstractCegarLoop]: Abstraction has 619 states and 836 transitions. [2024-11-14 03:00:02,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:00:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 836 transitions. [2024-11-14 03:00:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 03:00:02,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:02,387 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:02,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:00:02,387 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:02,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -39418350, now seen corresponding path program 1 times [2024-11-14 03:00:02,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:02,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433926081] [2024-11-14 03:00:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:02,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:00:02,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:02,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433926081] [2024-11-14 03:00:02,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433926081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:02,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:00:02,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:00:02,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761469695] [2024-11-14 03:00:02,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:02,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:00:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:00:02,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:00:02,590 INFO L87 Difference]: Start difference. First operand 619 states and 836 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:00:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:03,711 INFO L93 Difference]: Finished difference Result 1622 states and 2462 transitions. [2024-11-14 03:00:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:00:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2024-11-14 03:00:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:03,720 INFO L225 Difference]: With dead ends: 1622 [2024-11-14 03:00:03,721 INFO L226 Difference]: Without dead ends: 1416 [2024-11-14 03:00:03,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:00:03,723 INFO L432 NwaCegarLoop]: 560 mSDtfsCounter, 1601 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:03,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1601 Valid, 1494 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:00:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2024-11-14 03:00:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1405. [2024-11-14 03:00:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1194 states have (on average 1.431323283082077) internal successors, (1709), 1204 states have internal predecessors, (1709), 154 states have call successors, (154), 56 states have call predecessors, (154), 55 states have return successors, (219), 145 states have call predecessors, (219), 153 states have call successors, (219) [2024-11-14 03:00:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2082 transitions. [2024-11-14 03:00:03,843 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2082 transitions. Word has length 70 [2024-11-14 03:00:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:03,844 INFO L471 AbstractCegarLoop]: Abstraction has 1405 states and 2082 transitions. [2024-11-14 03:00:03,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:00:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2082 transitions. [2024-11-14 03:00:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 03:00:03,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:03,848 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:03,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:00:03,848 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:03,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:03,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1557347214, now seen corresponding path program 1 times [2024-11-14 03:00:03,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:03,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026710181] [2024-11-14 03:00:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:00:04,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026710181] [2024-11-14 03:00:04,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026710181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575990129] [2024-11-14 03:00:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:04,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:04,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:04,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:04,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:00:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:04,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:04,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:00:04,249 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:04,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575990129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:04,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:04,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:00:04,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890728242] [2024-11-14 03:00:04,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:04,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:04,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:04,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:04,251 INFO L87 Difference]: Start difference. First operand 1405 states and 2082 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:00:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:04,452 INFO L93 Difference]: Finished difference Result 1532 states and 2241 transitions. [2024-11-14 03:00:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:04,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2024-11-14 03:00:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:04,460 INFO L225 Difference]: With dead ends: 1532 [2024-11-14 03:00:04,460 INFO L226 Difference]: Without dead ends: 998 [2024-11-14 03:00:04,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:04,463 INFO L432 NwaCegarLoop]: 340 mSDtfsCounter, 25 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:04,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 652 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:00:04,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2024-11-14 03:00:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 998. [2024-11-14 03:00:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 851 states have (on average 1.4888366627497063) internal successors, (1267), 855 states have internal predecessors, (1267), 116 states have call successors, (116), 30 states have call predecessors, (116), 30 states have return successors, (182), 113 states have call predecessors, (182), 116 states have call successors, (182) [2024-11-14 03:00:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1565 transitions. [2024-11-14 03:00:04,545 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1565 transitions. Word has length 73 [2024-11-14 03:00:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:04,545 INFO L471 AbstractCegarLoop]: Abstraction has 998 states and 1565 transitions. [2024-11-14 03:00:04,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 03:00:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1565 transitions. [2024-11-14 03:00:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:00:04,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:04,553 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:04,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:00:04,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:00:04,754 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:04,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash -307024621, now seen corresponding path program 1 times [2024-11-14 03:00:04,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:04,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824058281] [2024-11-14 03:00:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:04,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:00:04,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824058281] [2024-11-14 03:00:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824058281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959884324] [2024-11-14 03:00:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:04,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:04,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:04,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:04,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:00:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:05,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:05,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:00:05,333 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:05,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959884324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:05,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:05,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:00:05,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863525876] [2024-11-14 03:00:05,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:05,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:05,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:05,335 INFO L87 Difference]: Start difference. First operand 998 states and 1565 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:05,619 INFO L93 Difference]: Finished difference Result 2966 states and 4786 transitions. [2024-11-14 03:00:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:05,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2024-11-14 03:00:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:05,633 INFO L225 Difference]: With dead ends: 2966 [2024-11-14 03:00:05,633 INFO L226 Difference]: Without dead ends: 1974 [2024-11-14 03:00:05,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:05,640 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 285 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:05,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 519 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:00:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2024-11-14 03:00:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1967. [2024-11-14 03:00:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1683 states have (on average 1.4854426619132501) internal successors, (2500), 1690 states have internal predecessors, (2500), 223 states have call successors, (223), 60 states have call predecessors, (223), 60 states have return successors, (351), 217 states have call predecessors, (351), 223 states have call successors, (351) [2024-11-14 03:00:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3074 transitions. [2024-11-14 03:00:05,801 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3074 transitions. Word has length 144 [2024-11-14 03:00:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:05,801 INFO L471 AbstractCegarLoop]: Abstraction has 1967 states and 3074 transitions. [2024-11-14 03:00:05,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3074 transitions. [2024-11-14 03:00:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:00:05,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:05,811 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:05,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:00:06,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:00:06,012 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:06,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1969040465, now seen corresponding path program 1 times [2024-11-14 03:00:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:06,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36822195] [2024-11-14 03:00:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:00:06,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36822195] [2024-11-14 03:00:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36822195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155805775] [2024-11-14 03:00:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:06,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:06,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:06,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:06,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:00:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:06,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:06,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 03:00:06,540 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155805775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:06,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:00:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078229695] [2024-11-14 03:00:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:06,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:06,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:06,544 INFO L87 Difference]: Start difference. First operand 1967 states and 3074 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:06,902 INFO L93 Difference]: Finished difference Result 5858 states and 9414 transitions. [2024-11-14 03:00:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:06,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2024-11-14 03:00:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:06,926 INFO L225 Difference]: With dead ends: 5858 [2024-11-14 03:00:06,926 INFO L226 Difference]: Without dead ends: 3897 [2024-11-14 03:00:06,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:06,938 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 291 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:06,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 519 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:00:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2024-11-14 03:00:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3885. [2024-11-14 03:00:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3332 states have (on average 1.481392557022809) internal successors, (4936), 3345 states have internal predecessors, (4936), 432 states have call successors, (432), 120 states have call predecessors, (432), 120 states have return successors, (680), 420 states have call predecessors, (680), 432 states have call successors, (680) [2024-11-14 03:00:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 6048 transitions. [2024-11-14 03:00:07,221 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 6048 transitions. Word has length 144 [2024-11-14 03:00:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:07,222 INFO L471 AbstractCegarLoop]: Abstraction has 3885 states and 6048 transitions. [2024-11-14 03:00:07,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 6048 transitions. [2024-11-14 03:00:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:00:07,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:07,231 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:07,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:00:07,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:07,431 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:07,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash -15842033, now seen corresponding path program 1 times [2024-11-14 03:00:07,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:07,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030395798] [2024-11-14 03:00:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:00:07,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030395798] [2024-11-14 03:00:07,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030395798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561527584] [2024-11-14 03:00:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:07,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:07,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:07,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:07,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:00:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:07,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:07,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:00:07,991 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:07,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561527584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:07,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:07,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:00:07,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083403532] [2024-11-14 03:00:07,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:07,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:07,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:07,992 INFO L87 Difference]: Start difference. First operand 3885 states and 6048 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:08,544 INFO L93 Difference]: Finished difference Result 11582 states and 18529 transitions. [2024-11-14 03:00:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2024-11-14 03:00:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:08,594 INFO L225 Difference]: With dead ends: 11582 [2024-11-14 03:00:08,594 INFO L226 Difference]: Without dead ends: 7703 [2024-11-14 03:00:08,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:08,614 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 270 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:08,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 519 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:00:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2024-11-14 03:00:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 7681. [2024-11-14 03:00:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7681 states, 6600 states have (on average 1.476969696969697) internal successors, (9748), 6625 states have internal predecessors, (9748), 840 states have call successors, (840), 240 states have call predecessors, (840), 240 states have return successors, (1320), 816 states have call predecessors, (1320), 840 states have call successors, (1320) [2024-11-14 03:00:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7681 states to 7681 states and 11908 transitions. [2024-11-14 03:00:09,180 INFO L78 Accepts]: Start accepts. Automaton has 7681 states and 11908 transitions. Word has length 144 [2024-11-14 03:00:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:09,181 INFO L471 AbstractCegarLoop]: Abstraction has 7681 states and 11908 transitions. [2024-11-14 03:00:09,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 7681 states and 11908 transitions. [2024-11-14 03:00:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:00:09,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:09,194 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:09,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:00:09,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:09,396 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:09,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash -96898671, now seen corresponding path program 1 times [2024-11-14 03:00:09,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:09,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537668067] [2024-11-14 03:00:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:09,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:00:09,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:09,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537668067] [2024-11-14 03:00:09,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537668067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313441013] [2024-11-14 03:00:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:09,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:09,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:09,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:09,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:00:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:09,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:09,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:00:09,911 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:09,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313441013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:09,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:09,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:00:09,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251895164] [2024-11-14 03:00:09,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:09,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:09,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:09,916 INFO L87 Difference]: Start difference. First operand 7681 states and 11908 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:10,872 INFO L93 Difference]: Finished difference Result 22910 states and 36477 transitions. [2024-11-14 03:00:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:10,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2024-11-14 03:00:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:10,990 INFO L225 Difference]: With dead ends: 22910 [2024-11-14 03:00:10,990 INFO L226 Difference]: Without dead ends: 15235 [2024-11-14 03:00:11,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:11,027 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 261 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:11,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 519 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:00:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2024-11-14 03:00:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 15193. [2024-11-14 03:00:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15193 states, 13076 states have (on average 1.4723156928724381) internal successors, (19252), 13125 states have internal predecessors, (19252), 1636 states have call successors, (1636), 480 states have call predecessors, (1636), 480 states have return successors, (2564), 1588 states have call predecessors, (2564), 1636 states have call successors, (2564) [2024-11-14 03:00:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15193 states to 15193 states and 23452 transitions. [2024-11-14 03:00:12,171 INFO L78 Accepts]: Start accepts. Automaton has 15193 states and 23452 transitions. Word has length 144 [2024-11-14 03:00:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:12,172 INFO L471 AbstractCegarLoop]: Abstraction has 15193 states and 23452 transitions. [2024-11-14 03:00:12,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 15193 states and 23452 transitions. [2024-11-14 03:00:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:00:12,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:12,197 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:12,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:00:12,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:12,398 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:12,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:12,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1452553521, now seen corresponding path program 1 times [2024-11-14 03:00:12,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:12,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665874785] [2024-11-14 03:00:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:12,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:00:12,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665874785] [2024-11-14 03:00:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665874785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530920779] [2024-11-14 03:00:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:12,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:12,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:12,578 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:12,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:00:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:12,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:12,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:00:12,876 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:12,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530920779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:12,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:12,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:00:12,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848019964] [2024-11-14 03:00:12,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:12,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:12,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:12,878 INFO L87 Difference]: Start difference. First operand 15193 states and 23452 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:14,514 INFO L93 Difference]: Finished difference Result 45326 states and 71809 transitions. [2024-11-14 03:00:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2024-11-14 03:00:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:14,687 INFO L225 Difference]: With dead ends: 45326 [2024-11-14 03:00:14,687 INFO L226 Difference]: Without dead ends: 30139 [2024-11-14 03:00:14,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:14,753 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 282 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:14,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 519 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:00:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30139 states. [2024-11-14 03:00:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30139 to 30057. [2024-11-14 03:00:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30057 states, 25908 states have (on average 1.4675003859811642) internal successors, (38020), 26005 states have internal predecessors, (38020), 3188 states have call successors, (3188), 960 states have call predecessors, (3188), 960 states have return successors, (4980), 3092 states have call predecessors, (4980), 3188 states have call successors, (4980) [2024-11-14 03:00:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30057 states to 30057 states and 46188 transitions. [2024-11-14 03:00:17,394 INFO L78 Accepts]: Start accepts. Automaton has 30057 states and 46188 transitions. Word has length 144 [2024-11-14 03:00:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:17,394 INFO L471 AbstractCegarLoop]: Abstraction has 30057 states and 46188 transitions. [2024-11-14 03:00:17,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 30057 states and 46188 transitions. [2024-11-14 03:00:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:00:17,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:17,446 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:17,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:00:17,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:17,647 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:17,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash -541178799, now seen corresponding path program 1 times [2024-11-14 03:00:17,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:17,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800591163] [2024-11-14 03:00:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:00:17,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800591163] [2024-11-14 03:00:17,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800591163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794367083] [2024-11-14 03:00:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:17,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:17,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:17,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:17,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:00:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:18,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:18,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:00:18,234 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:18,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794367083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:18,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:18,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:00:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406085220] [2024-11-14 03:00:18,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:18,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:18,238 INFO L87 Difference]: Start difference. First operand 30057 states and 46188 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:21,391 INFO L93 Difference]: Finished difference Result 89678 states and 141345 transitions. [2024-11-14 03:00:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2024-11-14 03:00:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:21,724 INFO L225 Difference]: With dead ends: 89678 [2024-11-14 03:00:21,724 INFO L226 Difference]: Without dead ends: 59627 [2024-11-14 03:00:21,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:21,826 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 276 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:21,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 519 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:00:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59627 states. [2024-11-14 03:00:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59627 to 59465. [2024-11-14 03:00:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59465 states, 51332 states have (on average 1.4625574690251695) internal successors, (75076), 51525 states have internal predecessors, (75076), 6212 states have call successors, (6212), 1920 states have call predecessors, (6212), 1920 states have return successors, (9668), 6020 states have call predecessors, (9668), 6212 states have call successors, (9668) [2024-11-14 03:00:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59465 states to 59465 states and 90956 transitions. [2024-11-14 03:00:26,225 INFO L78 Accepts]: Start accepts. Automaton has 59465 states and 90956 transitions. Word has length 144 [2024-11-14 03:00:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:00:26,226 INFO L471 AbstractCegarLoop]: Abstraction has 59465 states and 90956 transitions. [2024-11-14 03:00:26,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 59465 states and 90956 transitions. [2024-11-14 03:00:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-14 03:00:26,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:00:26,343 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:00:26,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:00:26,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:00:26,544 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:00:26,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:00:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -37583021, now seen corresponding path program 1 times [2024-11-14 03:00:26,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:00:26,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190665055] [2024-11-14 03:00:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:26,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:00:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:00:26,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190665055] [2024-11-14 03:00:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190665055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334294621] [2024-11-14 03:00:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:00:26,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:26,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:26,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:26,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9f58eac-445d-44d6-a980-4fc08fb7687c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:00:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:27,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:00:27,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:00:27,220 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:00:27,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334294621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:00:27,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:00:27,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:00:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984622573] [2024-11-14 03:00:27,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:00:27,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:00:27,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:00:27,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:00:27,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:27,223 INFO L87 Difference]: Start difference. First operand 59465 states and 90956 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:00:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:00:33,976 INFO L93 Difference]: Finished difference Result 177422 states and 278161 transitions. [2024-11-14 03:00:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:00:33,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2024-11-14 03:00:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:00:34,708 INFO L225 Difference]: With dead ends: 177422 [2024-11-14 03:00:34,708 INFO L226 Difference]: Without dead ends: 117963 [2024-11-14 03:00:34,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:00:34,920 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 264 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:00:34,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 519 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:00:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117963 states.