./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/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_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/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_1af0c798-5391-49fe-9a96-7e7ded8596b8/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 aa38d95315e187ea5fe9b62230d938985648af7e7d892502233db02121b7b545 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:29:42,559 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:29:42,677 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:29:42,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:29:42,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:29:42,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:29:42,737 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:29:42,737 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:29:42,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:29:42,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:29:42,738 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:29:42,738 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:29:42,738 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:29:42,738 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:29:42,738 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:29:42,738 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:29:42,738 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:29:42,740 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:29:42,741 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:29:42,741 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:29:42,741 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:29:42,741 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:29:42,742 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:29:42,742 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:29:42,742 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:29:42,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:29:42,742 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:29:42,742 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:29:42,742 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:29:42,743 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:29:42,743 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:29:42,743 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:29:42,743 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:29:42,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:29:42,743 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:29:42,743 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:29:42,743 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:29:42,744 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:29:42,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:29:42,744 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:29:42,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:29:42,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:29:42,746 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:29:42,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:29:42,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:29:42,747 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:29:42,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:29:42,747 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_1af0c798-5391-49fe-9a96-7e7ded8596b8/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 -> aa38d95315e187ea5fe9b62230d938985648af7e7d892502233db02121b7b545 [2024-11-14 03:29:43,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:29:43,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:29:43,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:29:43,167 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:29:43,167 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:29:43,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c Unable to find full path for "g++" [2024-11-14 03:29:45,615 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:29:46,596 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:29:46,597 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c [2024-11-14 03:29:46,675 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/data/81afc7e51/7d1dfdd6ea98481e97a00f782d989fd6/FLAGd04fd7638 [2024-11-14 03:29:46,702 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/data/81afc7e51/7d1dfdd6ea98481e97a00f782d989fd6 [2024-11-14 03:29:46,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:29:46,708 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:29:46,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:29:46,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:29:46,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:29:46,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:46,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c9124f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:46, skipping insertion in model container [2024-11-14 03:29:46,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:29:46" (1/1) ... [2024-11-14 03:29:47,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:29:49,556 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_1af0c798-5391-49fe-9a96-7e7ded8596b8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[378560,378573] [2024-11-14 03:29:49,628 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_1af0c798-5391-49fe-9a96-7e7ded8596b8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[383339,383352] [2024-11-14 03:29:50,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:29:50,049 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:29:51,361 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_1af0c798-5391-49fe-9a96-7e7ded8596b8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[378560,378573] [2024-11-14 03:29:51,370 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_1af0c798-5391-49fe-9a96-7e7ded8596b8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.08.cil-1.c[383339,383352] [2024-11-14 03:29:51,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:29:51,492 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:29:51,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51 WrapperNode [2024-11-14 03:29:51,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:29:51,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:29:51,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:29:51,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:29:51,504 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:51,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,162 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12981 [2024-11-14 03:29:52,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:29:52,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:29:52,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:29:52,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:29:52,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,678 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,865 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,949 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:29:52,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:29:52,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:29:52,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:29:52,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (1/1) ... [2024-11-14 03:29:52,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:29:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:52,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:29:53,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:29:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:29:53,042 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 03:29:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 03:29:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:29:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:29:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 03:29:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 03:29:53,043 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 03:29:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 03:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 03:29:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 03:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 03:29:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 03:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:29:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:29:53,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:29:53,232 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:29:53,235 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:30:07,899 INFO L? ?]: Removed 1731 outVars from TransFormulas that were not future-live. [2024-11-14 03:30:07,899 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:30:11,178 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:30:11,179 INFO L316 CfgBuilder]: Removed 12 assume(true) statements. [2024-11-14 03:30:11,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:30:11 BoogieIcfgContainer [2024-11-14 03:30:11,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:30:11,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:30:11,184 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:30:11,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:30:11,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:29:46" (1/3) ... [2024-11-14 03:30:11,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb8fc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:30:11, skipping insertion in model container [2024-11-14 03:30:11,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:51" (2/3) ... [2024-11-14 03:30:11,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb8fc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:30:11, skipping insertion in model container [2024-11-14 03:30:11,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:30:11" (3/3) ... [2024-11-14 03:30:11,198 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.08.cil-1.c [2024-11-14 03:30:11,224 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:30:11,230 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label42+token_ring.08.cil-1.c that has 7 procedures, 1796 locations, 1 initial locations, 12 loop locations, and 2 error locations. [2024-11-14 03:30:11,428 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:30:11,450 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;@6fb07eb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:30:11,451 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:30:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 1796 states, 1765 states have (on average 1.9592067988668556) internal successors, (3458), 1768 states have internal predecessors, (3458), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-14 03:30:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 03:30:11,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:11,485 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] [2024-11-14 03:30:11,486 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:11,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash 809139948, now seen corresponding path program 1 times [2024-11-14 03:30:11,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:11,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981985459] [2024-11-14 03:30:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:30:12,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981985459] [2024-11-14 03:30:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981985459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:12,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:12,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:30:12,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046485707] [2024-11-14 03:30:12,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:12,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:30:12,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:30:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:30:12,344 INFO L87 Difference]: Start difference. First operand has 1796 states, 1765 states have (on average 1.9592067988668556) internal successors, (3458), 1768 states have internal predecessors, (3458), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:30:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:13,809 INFO L93 Difference]: Finished difference Result 3728 states and 7230 transitions. [2024-11-14 03:30:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:30:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 55 [2024-11-14 03:30:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:13,841 INFO L225 Difference]: With dead ends: 3728 [2024-11-14 03:30:13,841 INFO L226 Difference]: Without dead ends: 1931 [2024-11-14 03:30:13,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:30:13,855 INFO L432 NwaCegarLoop]: 3409 mSDtfsCounter, 3665 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3665 SdHoareTripleChecker+Valid, 6736 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:13,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3665 Valid, 6736 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:30:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2024-11-14 03:30:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1930. [2024-11-14 03:30:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1876 states have (on average 1.9243070362473347) internal successors, (3610), 1879 states have internal predecessors, (3610), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 03:30:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3690 transitions. [2024-11-14 03:30:14,027 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3690 transitions. Word has length 55 [2024-11-14 03:30:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:14,027 INFO L471 AbstractCegarLoop]: Abstraction has 1930 states and 3690 transitions. [2024-11-14 03:30:14,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:30:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3690 transitions. [2024-11-14 03:30:14,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:30:14,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:14,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:14,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:30:14,039 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:14,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash 994621498, now seen corresponding path program 1 times [2024-11-14 03:30:14,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59367848] [2024-11-14 03:30:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:30:14,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59367848] [2024-11-14 03:30:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59367848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028593892] [2024-11-14 03:30:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:14,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:14,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:30:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:14,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:14,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:30:14,728 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:14,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028593892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:14,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:14,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:30:14,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744305485] [2024-11-14 03:30:14,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:14,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:14,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:14,735 INFO L87 Difference]: Start difference. First operand 1930 states and 3690 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (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 03:30:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:15,326 INFO L93 Difference]: Finished difference Result 2491 states and 4529 transitions. [2024-11-14 03:30:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (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 109 [2024-11-14 03:30:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:15,347 INFO L225 Difference]: With dead ends: 2491 [2024-11-14 03:30:15,348 INFO L226 Difference]: Without dead ends: 2207 [2024-11-14 03:30:15,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 03:30:15,354 INFO L432 NwaCegarLoop]: 3283 mSDtfsCounter, 3462 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3462 SdHoareTripleChecker+Valid, 3457 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:15,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3462 Valid, 3457 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:30:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2024-11-14 03:30:15,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2203. [2024-11-14 03:30:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2103 states have (on average 1.8720874940561103) internal successors, (3937), 2107 states have internal predecessors, (3937), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-14 03:30:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 4085 transitions. [2024-11-14 03:30:15,461 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 4085 transitions. Word has length 109 [2024-11-14 03:30:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:15,461 INFO L471 AbstractCegarLoop]: Abstraction has 2203 states and 4085 transitions. [2024-11-14 03:30:15,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (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 03:30:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 4085 transitions. [2024-11-14 03:30:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:30:15,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:15,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:15,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:30:15,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:15,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:15,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:15,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1667162470, now seen corresponding path program 1 times [2024-11-14 03:30:15,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:15,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116985132] [2024-11-14 03:30:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:15,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:30:15,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116985132] [2024-11-14 03:30:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116985132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417372169] [2024-11-14 03:30:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:15,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:15,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:15,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:30:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:16,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:16,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:30:16,336 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417372169] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:16,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:16,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:30:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005152391] [2024-11-14 03:30:16,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:16,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:16,338 INFO L87 Difference]: Start difference. First operand 2203 states and 4085 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 03:30:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:17,132 INFO L93 Difference]: Finished difference Result 3304 states and 5724 transitions. [2024-11-14 03:30:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 109 [2024-11-14 03:30:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:17,150 INFO L225 Difference]: With dead ends: 3304 [2024-11-14 03:30:17,150 INFO L226 Difference]: Without dead ends: 2747 [2024-11-14 03:30:17,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 03:30:17,155 INFO L432 NwaCegarLoop]: 3238 mSDtfsCounter, 3456 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:17,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3412 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2024-11-14 03:30:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2741. [2024-11-14 03:30:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2551 states have (on average 1.7949823598588788) internal successors, (4579), 2557 states have internal predecessors, (4579), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2024-11-14 03:30:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 4859 transitions. [2024-11-14 03:30:17,291 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 4859 transitions. Word has length 109 [2024-11-14 03:30:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:17,291 INFO L471 AbstractCegarLoop]: Abstraction has 2741 states and 4859 transitions. [2024-11-14 03:30:17,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 03:30:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 4859 transitions. [2024-11-14 03:30:17,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:30:17,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:17,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:17,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:30:17,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:17,499 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:17,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:17,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1750977786, now seen corresponding path program 1 times [2024-11-14 03:30:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:17,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415873037] [2024-11-14 03:30:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:17,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:30:17,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415873037] [2024-11-14 03:30:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415873037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951456301] [2024-11-14 03:30:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:17,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:17,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:17,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:30:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:18,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:18,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:30:18,093 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951456301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:18,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:18,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:30:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812797757] [2024-11-14 03:30:18,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:18,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:18,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:18,098 INFO L87 Difference]: Start difference. First operand 2741 states and 4859 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 03:30:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:18,895 INFO L93 Difference]: Finished difference Result 4906 states and 8064 transitions. [2024-11-14 03:30:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:18,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 109 [2024-11-14 03:30:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:18,929 INFO L225 Difference]: With dead ends: 4906 [2024-11-14 03:30:18,930 INFO L226 Difference]: Without dead ends: 3811 [2024-11-14 03:30:18,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 03:30:18,940 INFO L432 NwaCegarLoop]: 3238 mSDtfsCounter, 3465 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:18,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3412 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2024-11-14 03:30:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3801. [2024-11-14 03:30:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3435 states have (on average 1.6998544395924309) internal successors, (5839), 3445 states have internal predecessors, (5839), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2024-11-14 03:30:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 6375 transitions. [2024-11-14 03:30:19,167 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 6375 transitions. Word has length 109 [2024-11-14 03:30:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:19,167 INFO L471 AbstractCegarLoop]: Abstraction has 3801 states and 6375 transitions. [2024-11-14 03:30:19,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 03:30:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 6375 transitions. [2024-11-14 03:30:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:30:19,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:19,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:19,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:19,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:19,383 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:19,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:19,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1768994150, now seen corresponding path program 1 times [2024-11-14 03:30:19,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:19,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038334153] [2024-11-14 03:30:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:30:19,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:19,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038334153] [2024-11-14 03:30:19,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038334153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:19,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222174458] [2024-11-14 03:30:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:19,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:19,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:19,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:19,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:30:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:19,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:19,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:30:19,972 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222174458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:19,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:19,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:30:19,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064561468] [2024-11-14 03:30:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:19,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:19,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:19,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:19,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:19,974 INFO L87 Difference]: Start difference. First operand 3801 states and 6375 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:30:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:20,813 INFO L93 Difference]: Finished difference Result 8062 states and 12644 transitions. [2024-11-14 03:30:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 109 [2024-11-14 03:30:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:21,000 INFO L225 Difference]: With dead ends: 8062 [2024-11-14 03:30:21,000 INFO L226 Difference]: Without dead ends: 5907 [2024-11-14 03:30:21,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 03:30:21,011 INFO L432 NwaCegarLoop]: 3238 mSDtfsCounter, 3450 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:21,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3412 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2024-11-14 03:30:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 5889. [2024-11-14 03:30:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.604749951728133) internal successors, (8311), 5197 states have internal predecessors, (8311), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2024-11-14 03:30:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9343 transitions. [2024-11-14 03:30:21,350 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9343 transitions. Word has length 109 [2024-11-14 03:30:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:21,351 INFO L471 AbstractCegarLoop]: Abstraction has 5889 states and 9343 transitions. [2024-11-14 03:30:21,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 03:30:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9343 transitions. [2024-11-14 03:30:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:30:21,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:21,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:21,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:30:21,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:21,564 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:21,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:21,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633978, now seen corresponding path program 1 times [2024-11-14 03:30:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:21,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774400991] [2024-11-14 03:30:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:21,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:30:21,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:21,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774400991] [2024-11-14 03:30:21,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774400991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:21,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:21,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:21,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015802698] [2024-11-14 03:30:21,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:21,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:21,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:21,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:21,725 INFO L87 Difference]: Start difference. First operand 5889 states and 9343 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:30:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:22,735 INFO L93 Difference]: Finished difference Result 9251 states and 14288 transitions. [2024-11-14 03:30:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2024-11-14 03:30:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:22,788 INFO L225 Difference]: With dead ends: 9251 [2024-11-14 03:30:22,789 INFO L226 Difference]: Without dead ends: 7089 [2024-11-14 03:30:22,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:22,800 INFO L432 NwaCegarLoop]: 3342 mSDtfsCounter, 99 mSDsluCounter, 3247 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6589 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:22,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 6589 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:30:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2024-11-14 03:30:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 6753. [2024-11-14 03:30:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6753 states, 6011 states have (on average 1.603560139743803) internal successors, (9639), 6029 states have internal predecessors, (9639), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2024-11-14 03:30:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6753 states to 6753 states and 10703 transitions. [2024-11-14 03:30:23,193 INFO L78 Accepts]: Start accepts. Automaton has 6753 states and 10703 transitions. Word has length 109 [2024-11-14 03:30:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:23,194 INFO L471 AbstractCegarLoop]: Abstraction has 6753 states and 10703 transitions. [2024-11-14 03:30:23,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:30:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6753 states and 10703 transitions. [2024-11-14 03:30:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:30:23,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:23,215 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:23,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:30:23,216 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:23,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash 749086179, now seen corresponding path program 1 times [2024-11-14 03:30:23,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:23,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567561968] [2024-11-14 03:30:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 03:30:23,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567561968] [2024-11-14 03:30:23,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567561968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:23,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:23,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142488425] [2024-11-14 03:30:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:23,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:23,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:23,399 INFO L87 Difference]: Start difference. First operand 6753 states and 10703 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:24,653 INFO L93 Difference]: Finished difference Result 16822 states and 25588 transitions. [2024-11-14 03:30:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 03:30:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:24,745 INFO L225 Difference]: With dead ends: 16822 [2024-11-14 03:30:24,745 INFO L226 Difference]: Without dead ends: 11715 [2024-11-14 03:30:24,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:24,766 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3451 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:24,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3414 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11715 states. [2024-11-14 03:30:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11715 to 11665. [2024-11-14 03:30:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11665 states, 10219 states have (on average 1.5350817105391916) internal successors, (15687), 10253 states have internal predecessors, (15687), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2024-11-14 03:30:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11665 states to 11665 states and 17743 transitions. [2024-11-14 03:30:25,412 INFO L78 Accepts]: Start accepts. Automaton has 11665 states and 17743 transitions. Word has length 148 [2024-11-14 03:30:25,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:25,413 INFO L471 AbstractCegarLoop]: Abstraction has 11665 states and 17743 transitions. [2024-11-14 03:30:25,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11665 states and 17743 transitions. [2024-11-14 03:30:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:30:25,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:25,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:25,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:30:25,450 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:25,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash -601386829, now seen corresponding path program 1 times [2024-11-14 03:30:25,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:25,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304126699] [2024-11-14 03:30:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:25,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 03:30:25,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:25,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304126699] [2024-11-14 03:30:25,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304126699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:25,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:25,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65604763] [2024-11-14 03:30:25,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:25,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:25,593 INFO L87 Difference]: Start difference. First operand 11665 states and 17743 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:26,873 INFO L93 Difference]: Finished difference Result 31414 states and 46708 transitions. [2024-11-14 03:30:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 03:30:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:27,005 INFO L225 Difference]: With dead ends: 31414 [2024-11-14 03:30:27,005 INFO L226 Difference]: Without dead ends: 21395 [2024-11-14 03:30:27,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:27,053 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3453 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:27,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3414 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21395 states. [2024-11-14 03:30:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21395 to 21297. [2024-11-14 03:30:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21297 states, 18475 states have (on average 1.4864952638700948) internal successors, (27463), 18541 states have internal predecessors, (27463), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2024-11-14 03:30:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21297 states to 21297 states and 31439 transitions. [2024-11-14 03:30:28,682 INFO L78 Accepts]: Start accepts. Automaton has 21297 states and 31439 transitions. Word has length 148 [2024-11-14 03:30:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:28,683 INFO L471 AbstractCegarLoop]: Abstraction has 21297 states and 31439 transitions. [2024-11-14 03:30:28,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21297 states and 31439 transitions. [2024-11-14 03:30:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:30:28,776 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:28,777 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:28,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:30:28,777 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:28,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1411206606, now seen corresponding path program 1 times [2024-11-14 03:30:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:28,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69299934] [2024-11-14 03:30:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:28,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 03:30:28,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:28,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69299934] [2024-11-14 03:30:28,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69299934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:28,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:28,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:28,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977524209] [2024-11-14 03:30:28,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:28,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:28,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:28,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:28,984 INFO L87 Difference]: Start difference. First operand 21297 states and 31439 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:31,134 INFO L93 Difference]: Finished difference Result 60022 states and 87764 transitions. [2024-11-14 03:30:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:31,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 03:30:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:31,381 INFO L225 Difference]: With dead ends: 60022 [2024-11-14 03:30:31,381 INFO L226 Difference]: Without dead ends: 40371 [2024-11-14 03:30:31,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:31,459 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3455 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:31,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 3414 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40371 states. [2024-11-14 03:30:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40371 to 40177. [2024-11-14 03:30:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40177 states, 34667 states have (on average 1.453111027778579) internal successors, (50375), 34797 states have internal predecessors, (50375), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2024-11-14 03:30:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40177 states to 40177 states and 58063 transitions. [2024-11-14 03:30:33,596 INFO L78 Accepts]: Start accepts. Automaton has 40177 states and 58063 transitions. Word has length 148 [2024-11-14 03:30:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:33,597 INFO L471 AbstractCegarLoop]: Abstraction has 40177 states and 58063 transitions. [2024-11-14 03:30:33,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 40177 states and 58063 transitions. [2024-11-14 03:30:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:30:33,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:33,706 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:33,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:30:33,707 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:33,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash 205114348, now seen corresponding path program 1 times [2024-11-14 03:30:33,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:33,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004139155] [2024-11-14 03:30:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 03:30:33,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:33,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004139155] [2024-11-14 03:30:33,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004139155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:33,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:33,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062625040] [2024-11-14 03:30:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:33,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:33,857 INFO L87 Difference]: Start difference. First operand 40177 states and 58063 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:38,025 INFO L93 Difference]: Finished difference Result 116086 states and 167508 transitions. [2024-11-14 03:30:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 03:30:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:38,441 INFO L225 Difference]: With dead ends: 116086 [2024-11-14 03:30:38,441 INFO L226 Difference]: Without dead ends: 77555 [2024-11-14 03:30:38,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:38,868 INFO L432 NwaCegarLoop]: 3258 mSDtfsCounter, 3458 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:38,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3458 Valid, 3432 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:30:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77555 states. [2024-11-14 03:30:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77555 to 77169. [2024-11-14 03:30:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77169 states, 66411 states have (on average 1.429266236015118) internal successors, (94919), 66669 states have internal predecessors, (94919), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2024-11-14 03:30:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77169 states to 77169 states and 109775 transitions. [2024-11-14 03:30:43,090 INFO L78 Accepts]: Start accepts. Automaton has 77169 states and 109775 transitions. Word has length 148 [2024-11-14 03:30:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:43,090 INFO L471 AbstractCegarLoop]: Abstraction has 77169 states and 109775 transitions. [2024-11-14 03:30:43,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 77169 states and 109775 transitions. [2024-11-14 03:30:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 03:30:43,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:43,344 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:43,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:30:43,345 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:43,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:43,348 INFO L85 PathProgramCache]: Analyzing trace with hash -34838106, now seen corresponding path program 1 times [2024-11-14 03:30:43,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:43,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220014204] [2024-11-14 03:30:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:43,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 14 proven. 59 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 03:30:44,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220014204] [2024-11-14 03:30:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220014204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298255065] [2024-11-14 03:30:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:44,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:44,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:30:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:44,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:44,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:30:44,766 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:44,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298255065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:44,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:44,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:30:44,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852367810] [2024-11-14 03:30:44,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:44,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:44,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:44,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:44,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:30:44,771 INFO L87 Difference]: Start difference. First operand 77169 states and 109775 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:50,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:50,183 INFO L93 Difference]: Finished difference Result 146805 states and 210001 transitions. [2024-11-14 03:30:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:50,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 171 [2024-11-14 03:30:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:50,751 INFO L225 Difference]: With dead ends: 146805 [2024-11-14 03:30:50,751 INFO L226 Difference]: Without dead ends: 108275 [2024-11-14 03:30:50,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:30:50,859 INFO L432 NwaCegarLoop]: 3380 mSDtfsCounter, 148 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 6628 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:50,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 6628 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:30:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108275 states. [2024-11-14 03:30:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108275 to 95345. [2024-11-14 03:30:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95345 states, 83819 states have (on average 1.4561734213006599) internal successors, (122055), 84077 states have internal predecessors, (122055), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2024-11-14 03:30:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95345 states to 95345 states and 137679 transitions. [2024-11-14 03:30:55,719 INFO L78 Accepts]: Start accepts. Automaton has 95345 states and 137679 transitions. Word has length 171 [2024-11-14 03:30:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:55,722 INFO L471 AbstractCegarLoop]: Abstraction has 95345 states and 137679 transitions. [2024-11-14 03:30:55,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 95345 states and 137679 transitions. [2024-11-14 03:30:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 03:30:56,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:56,272 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:56,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:56,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:56,473 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:56,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:56,474 INFO L85 PathProgramCache]: Analyzing trace with hash -185454276, now seen corresponding path program 2 times [2024-11-14 03:30:56,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:56,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090420589] [2024-11-14 03:30:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:56,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:30:56,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:56,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090420589] [2024-11-14 03:30:56,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090420589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584357586] [2024-11-14 03:30:56,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:30:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:56,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:56,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:30:57,114 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:30:57,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:30:57,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:30:57,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 03:30:57,193 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:57,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584357586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:57,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:57,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:30:57,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605784879] [2024-11-14 03:30:57,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:57,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:57,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:30:57,196 INFO L87 Difference]: Start difference. First operand 95345 states and 137679 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:31:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:01,033 INFO L93 Difference]: Finished difference Result 152309 states and 222801 transitions. [2024-11-14 03:31:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:01,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 171 [2024-11-14 03:31:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:01,592 INFO L225 Difference]: With dead ends: 152309 [2024-11-14 03:31:01,592 INFO L226 Difference]: Without dead ends: 95603 [2024-11-14 03:31:01,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:31:01,682 INFO L432 NwaCegarLoop]: 3403 mSDtfsCounter, 180 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 6635 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:01,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 6635 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:31:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95603 states. [2024-11-14 03:31:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95603 to 95089. [2024-11-14 03:31:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95089 states, 83563 states have (on average 1.4453167071550805) internal successors, (120775), 83821 states have internal predecessors, (120775), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2024-11-14 03:31:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95089 states to 95089 states and 136399 transitions. [2024-11-14 03:31:05,470 INFO L78 Accepts]: Start accepts. Automaton has 95089 states and 136399 transitions. Word has length 171 [2024-11-14 03:31:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:05,471 INFO L471 AbstractCegarLoop]: Abstraction has 95089 states and 136399 transitions. [2024-11-14 03:31:05,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:31:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 95089 states and 136399 transitions. [2024-11-14 03:31:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 03:31:06,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:06,008 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:06,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:31:06,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:06,208 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:06,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1049778340, now seen corresponding path program 1 times [2024-11-14 03:31:06,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:06,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680852549] [2024-11-14 03:31:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:06,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:31:06,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:06,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680852549] [2024-11-14 03:31:06,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680852549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:31:06,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708223593] [2024-11-14 03:31:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:06,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:06,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:06,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:31:06,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:31:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:06,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:31:06,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:31:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 03:31:06,860 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:31:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708223593] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:06,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:31:06,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:31:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130276540] [2024-11-14 03:31:06,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:06,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:31:06,863 INFO L87 Difference]: Start difference. First operand 95089 states and 136399 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:31:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:10,570 INFO L93 Difference]: Finished difference Result 143029 states and 207313 transitions. [2024-11-14 03:31:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 171 [2024-11-14 03:31:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:10,895 INFO L225 Difference]: With dead ends: 143029 [2024-11-14 03:31:10,895 INFO L226 Difference]: Without dead ends: 95347 [2024-11-14 03:31:10,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:31:10,991 INFO L432 NwaCegarLoop]: 3386 mSDtfsCounter, 179 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 6617 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:10,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 6617 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:31:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95347 states. [2024-11-14 03:31:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95347 to 94449. [2024-11-14 03:31:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94449 states, 82923 states have (on average 1.431774055449031) internal successors, (118727), 83181 states have internal predecessors, (118727), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2024-11-14 03:31:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94449 states to 94449 states and 134351 transitions. [2024-11-14 03:31:14,722 INFO L78 Accepts]: Start accepts. Automaton has 94449 states and 134351 transitions. Word has length 171 [2024-11-14 03:31:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:14,722 INFO L471 AbstractCegarLoop]: Abstraction has 94449 states and 134351 transitions. [2024-11-14 03:31:14,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:31:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 94449 states and 134351 transitions. [2024-11-14 03:31:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 03:31:14,926 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:14,926 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:14,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:31:15,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:15,127 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:15,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1802549956, now seen corresponding path program 1 times [2024-11-14 03:31:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:15,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314808020] [2024-11-14 03:31:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:15,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:31:15,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:15,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314808020] [2024-11-14 03:31:15,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314808020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:31:15,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951693331] [2024-11-14 03:31:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:15,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:15,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:31:15,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af0c798-5391-49fe-9a96-7e7ded8596b8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:31:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:15,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:31:15,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:31:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 03:31:15,998 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:31:15,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951693331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:15,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:31:15,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:31:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039676718] [2024-11-14 03:31:15,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:15,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:31:16,000 INFO L87 Difference]: Start difference. First operand 94449 states and 134351 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:31:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:19,830 INFO L93 Difference]: Finished difference Result 159853 states and 224394 transitions. [2024-11-14 03:31:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 171 [2024-11-14 03:31:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:20,117 INFO L225 Difference]: With dead ends: 159853 [2024-11-14 03:31:20,117 INFO L226 Difference]: Without dead ends: 113131 [2024-11-14 03:31:20,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:31:20,189 INFO L432 NwaCegarLoop]: 3265 mSDtfsCounter, 3459 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3314 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:20,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3314 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:31:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113131 states.