./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/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_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/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_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/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 3add2c82410ff745811ed91690a644a775913a086eeabc1a421c899bac857c34 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:29:40,597 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:29:40,726 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:29:40,733 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:29:40,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:29:40,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:29:40,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:29:40,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:29:40,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:29:40,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:29:40,789 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:29:40,790 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:29:40,790 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:29:40,790 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:29:40,790 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:29:40,790 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:29:40,790 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:29:40,790 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:29:40,791 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:29:40,791 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:29:40,791 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:29:40,791 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:29:40,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:29:40,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:29:40,792 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:29:40,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:29:40,792 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:29:40,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:29:40,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:29:40,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:29:40,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:29:40,795 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:29:40,796 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:29:40,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:29:40,797 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:29:40,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:29:40,797 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:29:40,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:29:40,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:29:40,798 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:29:40,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:29:40,798 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:29:40,798 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:29:40,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:29:40,799 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:29:40,799 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:29:40,799 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:29:40,799 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_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/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 -> 3add2c82410ff745811ed91690a644a775913a086eeabc1a421c899bac857c34 [2024-11-14 03:29:41,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:29:41,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:29:41,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:29:41,252 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:29:41,252 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:29:41,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c Unable to find full path for "g++" [2024-11-14 03:29:43,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:29:45,131 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:29:45,132 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c [2024-11-14 03:29:45,193 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/data/cefd8034f/8d6f64fe304c4b3f88114e409c57778e/FLAGe132c9273 [2024-11-14 03:29:45,220 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/data/cefd8034f/8d6f64fe304c4b3f88114e409c57778e [2024-11-14 03:29:45,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:29:45,227 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:29:45,229 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:29:45,229 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:29:45,235 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:29:45,236 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:29:45" (1/1) ... [2024-11-14 03:29:45,237 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9eff732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:45, skipping insertion in model container [2024-11-14 03:29:45,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:29:45" (1/1) ... [2024-11-14 03:29:45,491 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:29:48,079 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_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[380593,380606] [2024-11-14 03:29:48,127 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_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[383339,383352] [2024-11-14 03:29:48,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:29:48,428 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:29:49,546 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_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[380593,380606] [2024-11-14 03:29:49,622 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_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[383339,383352] [2024-11-14 03:29:49,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:29:49,721 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:29:49,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49 WrapperNode [2024-11-14 03:29:49,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:29:49,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:29:49,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:29:49,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:29:49,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:49,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,212 INFO L138 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12751 [2024-11-14 03:29:50,213 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:29:50,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:29:50,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:29:50,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:29:50,222 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,349 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,867 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:29:50,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:29:50,870 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:29:50,870 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:29:50,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (1/1) ... [2024-11-14 03:29:50,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:29:50,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:29:50,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:29:50,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:29:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:29:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 03:29:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 03:29:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 03:29:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 03:29:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 03:29:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 03:29:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 03:29:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 03:29:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 03:29:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 03:29:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 03:29:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 03:29:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 03:29:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 03:29:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:29:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:29:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:29:51,147 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:29:51,149 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:30:04,807 INFO L? ?]: Removed 1711 outVars from TransFormulas that were not future-live. [2024-11-14 03:30:04,807 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:30:07,818 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:30:07,818 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-14 03:30:07,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:30:07 BoogieIcfgContainer [2024-11-14 03:30:07,819 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:30:07,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:30:07,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:30:07,828 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:30:07,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:29:45" (1/3) ... [2024-11-14 03:30:07,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a01a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:30:07, skipping insertion in model container [2024-11-14 03:30:07,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:29:49" (2/3) ... [2024-11-14 03:30:07,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a01a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:30:07, skipping insertion in model container [2024-11-14 03:30:07,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:30:07" (3/3) ... [2024-11-14 03:30:07,832 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.04.cil-2.c [2024-11-14 03:30:07,855 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:30:07,858 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label49+token_ring.04.cil-2.c that has 8 procedures, 1754 locations, 1 initial locations, 8 loop locations, and 2 error locations. [2024-11-14 03:30:08,002 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:30:08,022 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;@2e15d336, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:30:08,023 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 03:30:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1724 states have (on average 1.9698375870069607) internal successors, (3396), 1729 states have internal predecessors, (3396), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-14 03:30:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:30:08,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:08,060 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] [2024-11-14 03:30:08,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:08,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1003129267, now seen corresponding path program 1 times [2024-11-14 03:30:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934919822] [2024-11-14 03:30:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:08,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:08,797 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 03:30:08,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:08,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934919822] [2024-11-14 03:30:08,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934919822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:08,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:08,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:30:08,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480718988] [2024-11-14 03:30:08,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:08,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:30:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:30:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:30:08,863 INFO L87 Difference]: Start difference. First operand has 1754 states, 1724 states have (on average 1.9698375870069607) internal successors, (3396), 1729 states have internal predecessors, (3396), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:30:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:10,238 INFO L93 Difference]: Finished difference Result 3595 states and 7014 transitions. [2024-11-14 03:30:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:30:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-14 03:30:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:10,277 INFO L225 Difference]: With dead ends: 3595 [2024-11-14 03:30:10,277 INFO L226 Difference]: Without dead ends: 1840 [2024-11-14 03:30:10,288 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 03:30:10,294 INFO L432 NwaCegarLoop]: 3288 mSDtfsCounter, 3533 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 6508 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:10,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 6508 Invalid, 616 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:30:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2024-11-14 03:30:10,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1839. [2024-11-14 03:30:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1791 states have (on average 1.9430485762144054) internal successors, (3480), 1795 states have internal predecessors, (3480), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-14 03:30:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 3546 transitions. [2024-11-14 03:30:10,500 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 3546 transitions. Word has length 44 [2024-11-14 03:30:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:10,501 INFO L471 AbstractCegarLoop]: Abstraction has 1839 states and 3546 transitions. [2024-11-14 03:30:10,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:30:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 3546 transitions. [2024-11-14 03:30:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:30:10,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:10,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:10,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:30:10,513 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:10,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:10,514 INFO L85 PathProgramCache]: Analyzing trace with hash -314819094, now seen corresponding path program 1 times [2024-11-14 03:30:10,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:10,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247117559] [2024-11-14 03:30:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:10,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:30:10,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247117559] [2024-11-14 03:30:10,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247117559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:10,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293841154] [2024-11-14 03:30:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:10,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:10,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:10,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:30:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:11,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:11,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:30:11,238 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293841154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:11,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:30:11,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025630451] [2024-11-14 03:30:11,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:11,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:11,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:11,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:11,244 INFO L87 Difference]: Start difference. First operand 1839 states and 3546 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:30:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:12,017 INFO L93 Difference]: Finished difference Result 2218 states and 4089 transitions. [2024-11-14 03:30:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:12,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 82 [2024-11-14 03:30:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:12,036 INFO L225 Difference]: With dead ends: 2218 [2024-11-14 03:30:12,037 INFO L226 Difference]: Without dead ends: 2025 [2024-11-14 03:30:12,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 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 03:30:12,041 INFO L432 NwaCegarLoop]: 3225 mSDtfsCounter, 3394 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3394 SdHoareTripleChecker+Valid, 3342 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:12,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3394 Valid, 3342 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2024-11-14 03:30:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 2019. [2024-11-14 03:30:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1933 states have (on average 1.9022245214692188) internal successors, (3677), 1938 states have internal predecessors, (3677), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2024-11-14 03:30:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3795 transitions. [2024-11-14 03:30:12,182 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3795 transitions. Word has length 82 [2024-11-14 03:30:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:12,182 INFO L471 AbstractCegarLoop]: Abstraction has 2019 states and 3795 transitions. [2024-11-14 03:30:12,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:30:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3795 transitions. [2024-11-14 03:30:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:30:12,190 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:12,190 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:12,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:30:12,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 03:30:12,392 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:12,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash 533232138, now seen corresponding path program 1 times [2024-11-14 03:30:12,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:12,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535870984] [2024-11-14 03:30:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:12,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:30:12,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535870984] [2024-11-14 03:30:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535870984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:12,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208062083] [2024-11-14 03:30:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:12,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:12,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:12,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:12,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:30:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:12,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:12,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 03:30:12,928 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:12,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208062083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:12,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:12,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 03:30:12,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693566072] [2024-11-14 03:30:12,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:12,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:12,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:12,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:12,930 INFO L87 Difference]: Start difference. First operand 2019 states and 3795 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:30:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:13,670 INFO L93 Difference]: Finished difference Result 2752 states and 4838 transitions. [2024-11-14 03:30:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 82 [2024-11-14 03:30:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:13,689 INFO L225 Difference]: With dead ends: 2752 [2024-11-14 03:30:13,690 INFO L226 Difference]: Without dead ends: 2379 [2024-11-14 03:30:13,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 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 03:30:13,695 INFO L432 NwaCegarLoop]: 3181 mSDtfsCounter, 3397 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3397 SdHoareTripleChecker+Valid, 3298 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:13,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3397 Valid, 3298 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2024-11-14 03:30:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2371. [2024-11-14 03:30:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2211 states have (on average 1.835820895522388) internal successors, (4059), 2218 states have internal predecessors, (4059), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-14 03:30:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 4277 transitions. [2024-11-14 03:30:13,838 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 4277 transitions. Word has length 82 [2024-11-14 03:30:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:13,840 INFO L471 AbstractCegarLoop]: Abstraction has 2371 states and 4277 transitions. [2024-11-14 03:30:13,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:30:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 4277 transitions. [2024-11-14 03:30:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:30:13,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:13,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:13,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:14,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 03:30:14,054 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:14,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1829849578, now seen corresponding path program 1 times [2024-11-14 03:30:14,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:14,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262064691] [2024-11-14 03:30:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:14,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:30:14,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:14,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262064691] [2024-11-14 03:30:14,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262064691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:14,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:14,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790077329] [2024-11-14 03:30:14,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:14,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:14,303 INFO L87 Difference]: Start difference. First operand 2371 states and 4277 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:30:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:15,169 INFO L93 Difference]: Finished difference Result 2947 states and 5092 transitions. [2024-11-14 03:30:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2024-11-14 03:30:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:15,188 INFO L225 Difference]: With dead ends: 2947 [2024-11-14 03:30:15,188 INFO L226 Difference]: Without dead ends: 2567 [2024-11-14 03:30:15,191 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 03:30:15,192 INFO L432 NwaCegarLoop]: 3245 mSDtfsCounter, 59 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:15,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6431 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:30:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2024-11-14 03:30:15,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2495. [2024-11-14 03:30:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2327 states have (on average 1.821658788139235) internal successors, (4239), 2334 states have internal predecessors, (4239), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-14 03:30:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 4465 transitions. [2024-11-14 03:30:15,320 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 4465 transitions. Word has length 82 [2024-11-14 03:30:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:15,320 INFO L471 AbstractCegarLoop]: Abstraction has 2495 states and 4465 transitions. [2024-11-14 03:30:15,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:30:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 4465 transitions. [2024-11-14 03:30:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:30:15,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:15,327 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:15,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:30:15,327 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:15,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1093339987, now seen corresponding path program 1 times [2024-11-14 03:30:15,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:15,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522970837] [2024-11-14 03:30:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:30:15,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:15,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522970837] [2024-11-14 03:30:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522970837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:15,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:15,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332615919] [2024-11-14 03:30:15,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:15,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:15,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:15,456 INFO L87 Difference]: Start difference. First operand 2495 states and 4465 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:16,172 INFO L93 Difference]: Finished difference Result 4156 states and 6826 transitions. [2024-11-14 03:30:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:16,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 109 [2024-11-14 03:30:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:16,203 INFO L225 Difference]: With dead ends: 4156 [2024-11-14 03:30:16,204 INFO L226 Difference]: Without dead ends: 3307 [2024-11-14 03:30:16,209 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 03:30:16,211 INFO L432 NwaCegarLoop]: 3195 mSDtfsCounter, 3387 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:16,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3312 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2024-11-14 03:30:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3291. [2024-11-14 03:30:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 2971 states have (on average 1.7256815886906764) internal successors, (5127), 2982 states have internal predecessors, (5127), 214 states have call successors, (214), 105 states have call predecessors, (214), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2024-11-14 03:30:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5553 transitions. [2024-11-14 03:30:16,416 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5553 transitions. Word has length 109 [2024-11-14 03:30:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:16,417 INFO L471 AbstractCegarLoop]: Abstraction has 3291 states and 5553 transitions. [2024-11-14 03:30:16,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5553 transitions. [2024-11-14 03:30:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 03:30:16,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:16,432 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:30:16,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:30:16,433 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:16,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1144870267, now seen corresponding path program 1 times [2024-11-14 03:30:16,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:16,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830247192] [2024-11-14 03:30:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:30:16,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:16,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830247192] [2024-11-14 03:30:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830247192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:16,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:30:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:30:16,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629822612] [2024-11-14 03:30:16,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:16,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:16,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:30:16,600 INFO L87 Difference]: Start difference. First operand 3291 states and 5553 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:17,521 INFO L93 Difference]: Finished difference Result 6508 states and 10066 transitions. [2024-11-14 03:30:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 109 [2024-11-14 03:30:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:17,561 INFO L225 Difference]: With dead ends: 6508 [2024-11-14 03:30:17,562 INFO L226 Difference]: Without dead ends: 4863 [2024-11-14 03:30:17,571 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 03:30:17,572 INFO L432 NwaCegarLoop]: 3208 mSDtfsCounter, 3390 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 3325 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:17,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3390 Valid, 3325 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:30:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2024-11-14 03:30:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4835. [2024-11-14 03:30:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4219 states have (on average 1.617207869163309) internal successors, (6823), 4238 states have internal predecessors, (6823), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2024-11-14 03:30:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 7633 transitions. [2024-11-14 03:30:17,856 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 7633 transitions. Word has length 109 [2024-11-14 03:30:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:17,857 INFO L471 AbstractCegarLoop]: Abstraction has 4835 states and 7633 transitions. [2024-11-14 03:30:17,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 03:30:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 7633 transitions. [2024-11-14 03:30:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:30:17,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:17,874 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, 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] [2024-11-14 03:30:17,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:30:17,874 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:17,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash 774197415, now seen corresponding path program 1 times [2024-11-14 03:30:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:17,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518295214] [2024-11-14 03:30:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 03:30:18,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:18,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518295214] [2024-11-14 03:30:18,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518295214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022529558] [2024-11-14 03:30:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:18,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:18,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:18,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:18,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:30:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:18,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:18,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:30:18,334 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022529558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:18,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:30:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273765721] [2024-11-14 03:30:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:18,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:18,337 INFO L87 Difference]: Start difference. First operand 4835 states and 7633 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:19,214 INFO L93 Difference]: Finished difference Result 7523 states and 11415 transitions. [2024-11-14 03:30:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2024-11-14 03:30:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:19,252 INFO L225 Difference]: With dead ends: 7523 [2024-11-14 03:30:19,252 INFO L226 Difference]: Without dead ends: 5879 [2024-11-14 03:30:19,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:19,260 INFO L432 NwaCegarLoop]: 3241 mSDtfsCounter, 74 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6426 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:19,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6426 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:30:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2024-11-14 03:30:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 5467. [2024-11-14 03:30:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5467 states, 4803 states have (on average 1.6037892983551947) internal successors, (7703), 4822 states have internal predecessors, (7703), 430 states have call successors, (430), 233 states have call predecessors, (430), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2024-11-14 03:30:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5467 states to 5467 states and 8561 transitions. [2024-11-14 03:30:19,581 INFO L78 Accepts]: Start accepts. Automaton has 5467 states and 8561 transitions. Word has length 124 [2024-11-14 03:30:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:19,582 INFO L471 AbstractCegarLoop]: Abstraction has 5467 states and 8561 transitions. [2024-11-14 03:30:19,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5467 states and 8561 transitions. [2024-11-14 03:30:19,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:30:19,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:19,598 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:19,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:19,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 03:30:19,801 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:19,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash -251301057, now seen corresponding path program 1 times [2024-11-14 03:30:19,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:19,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18465064] [2024-11-14 03:30:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:19,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:30:19,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:19,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18465064] [2024-11-14 03:30:19,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18465064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:19,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696432276] [2024-11-14 03:30:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:19,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:19,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:20,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:20,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:30:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:20,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:20,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:30:20,267 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:20,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696432276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:20,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:30:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411253800] [2024-11-14 03:30:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:20,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:20,269 INFO L87 Difference]: Start difference. First operand 5467 states and 8561 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:21,085 INFO L93 Difference]: Finished difference Result 8839 states and 13307 transitions. [2024-11-14 03:30:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2024-11-14 03:30:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:21,120 INFO L225 Difference]: With dead ends: 8839 [2024-11-14 03:30:21,120 INFO L226 Difference]: Without dead ends: 6885 [2024-11-14 03:30:21,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:21,129 INFO L432 NwaCegarLoop]: 3270 mSDtfsCounter, 86 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 6457 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:21,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6457 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2024-11-14 03:30:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6361. [2024-11-14 03:30:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 5625 states have (on average 1.5848888888888888) internal successors, (8915), 5644 states have internal predecessors, (8915), 466 states have call successors, (466), 269 states have call predecessors, (466), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2024-11-14 03:30:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 9845 transitions. [2024-11-14 03:30:21,616 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 9845 transitions. Word has length 124 [2024-11-14 03:30:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:21,617 INFO L471 AbstractCegarLoop]: Abstraction has 6361 states and 9845 transitions. [2024-11-14 03:30:21,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 9845 transitions. [2024-11-14 03:30:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:30:21,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:21,643 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, 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] [2024-11-14 03:30:21,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:30:21,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:30:21,844 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:21,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash -895644046, now seen corresponding path program 1 times [2024-11-14 03:30:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892316085] [2024-11-14 03:30:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 03:30:22,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892316085] [2024-11-14 03:30:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892316085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948163055] [2024-11-14 03:30:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:22,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:22,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:22,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:22,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:30:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:22,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:22,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:30:22,279 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:22,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948163055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:22,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:22,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:30:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924829432] [2024-11-14 03:30:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:22,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:22,283 INFO L87 Difference]: Start difference. First operand 6361 states and 9845 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:23,230 INFO L93 Difference]: Finished difference Result 10683 states and 15965 transitions. [2024-11-14 03:30:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2024-11-14 03:30:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:23,275 INFO L225 Difference]: With dead ends: 10683 [2024-11-14 03:30:23,275 INFO L226 Difference]: Without dead ends: 8246 [2024-11-14 03:30:23,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:23,286 INFO L432 NwaCegarLoop]: 3275 mSDtfsCounter, 92 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6462 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:23,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6462 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:30:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2024-11-14 03:30:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7666. [2024-11-14 03:30:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7666 states, 6822 states have (on average 1.562738199941366) internal successors, (10661), 6841 states have internal predecessors, (10661), 520 states have call successors, (520), 323 states have call predecessors, (520), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2024-11-14 03:30:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7666 states to 7666 states and 11699 transitions. [2024-11-14 03:30:23,681 INFO L78 Accepts]: Start accepts. Automaton has 7666 states and 11699 transitions. Word has length 124 [2024-11-14 03:30:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:23,682 INFO L471 AbstractCegarLoop]: Abstraction has 7666 states and 11699 transitions. [2024-11-14 03:30:23,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7666 states and 11699 transitions. [2024-11-14 03:30:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:30:23,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:23,703 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:23,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:30:23,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 03:30:23,904 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:23,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash 338614868, now seen corresponding path program 1 times [2024-11-14 03:30:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:23,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324462787] [2024-11-14 03:30:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:23,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 03:30:24,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:24,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324462787] [2024-11-14 03:30:24,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324462787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:24,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950351556] [2024-11-14 03:30:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:24,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:24,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:24,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:30:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:24,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:24,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:30:24,354 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950351556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:24,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-14 03:30:24,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566559056] [2024-11-14 03:30:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:24,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:24,359 INFO L87 Difference]: Start difference. First operand 7666 states and 11699 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:25,265 INFO L93 Difference]: Finished difference Result 13046 states and 19286 transitions. [2024-11-14 03:30:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2024-11-14 03:30:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:25,318 INFO L225 Difference]: With dead ends: 13046 [2024-11-14 03:30:25,319 INFO L226 Difference]: Without dead ends: 9970 [2024-11-14 03:30:25,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:30:25,336 INFO L432 NwaCegarLoop]: 3265 mSDtfsCounter, 80 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6452 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:25,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6452 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9970 states. [2024-11-14 03:30:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9970 to 9502. [2024-11-14 03:30:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 8496 states have (on average 1.5344868173258004) internal successors, (13037), 8515 states have internal predecessors, (13037), 601 states have call successors, (601), 404 states have call predecessors, (601), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2024-11-14 03:30:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 14237 transitions. [2024-11-14 03:30:25,963 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 14237 transitions. Word has length 124 [2024-11-14 03:30:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:25,963 INFO L471 AbstractCegarLoop]: Abstraction has 9502 states and 14237 transitions. [2024-11-14 03:30:25,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 03:30:25,964 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 14237 transitions. [2024-11-14 03:30:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:30:25,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:25,991 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, 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] [2024-11-14 03:30:26,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:30:26,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:30:26,192 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:26,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1770967109, now seen corresponding path program 2 times [2024-11-14 03:30:26,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:26,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159907397] [2024-11-14 03:30:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:26,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:30:26,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:26,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159907397] [2024-11-14 03:30:26,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159907397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:26,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494959775] [2024-11-14 03:30:26,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:30:26,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:26,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:26,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:30:26,699 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:30:26,699 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:30:26,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:30:26,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:30:26,739 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494959775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:26,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:30:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821466055] [2024-11-14 03:30:26,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:26,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:26,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:26,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:30:26,743 INFO L87 Difference]: Start difference. First operand 9502 states and 14237 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:30:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:27,590 INFO L93 Difference]: Finished difference Result 14488 states and 21347 transitions. [2024-11-14 03:30:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2024-11-14 03:30:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:27,627 INFO L225 Difference]: With dead ends: 14488 [2024-11-14 03:30:27,628 INFO L226 Difference]: Without dead ends: 9522 [2024-11-14 03:30:27,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 03:30:27,640 INFO L432 NwaCegarLoop]: 3269 mSDtfsCounter, 133 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 6444 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:27,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 6444 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:30:27,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2024-11-14 03:30:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 9372. [2024-11-14 03:30:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9372 states, 8366 states have (on average 1.5215156586182166) internal successors, (12729), 8385 states have internal predecessors, (12729), 601 states have call successors, (601), 404 states have call predecessors, (601), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2024-11-14 03:30:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9372 states to 9372 states and 13929 transitions. [2024-11-14 03:30:28,001 INFO L78 Accepts]: Start accepts. Automaton has 9372 states and 13929 transitions. Word has length 124 [2024-11-14 03:30:28,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:28,001 INFO L471 AbstractCegarLoop]: Abstraction has 9372 states and 13929 transitions. [2024-11-14 03:30:28,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:30:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 9372 states and 13929 transitions. [2024-11-14 03:30:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:30:28,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:28,026 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:28,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:28,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:30:28,228 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:28,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1579891463, now seen corresponding path program 1 times [2024-11-14 03:30:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431974241] [2024-11-14 03:30:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:30:28,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:28,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431974241] [2024-11-14 03:30:28,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431974241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:28,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047728049] [2024-11-14 03:30:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:28,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:28,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:28,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:28,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:30:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:28,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:30:28,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:30:28,774 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:30:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047728049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:30:28,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:30:28,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:30:28,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538269980] [2024-11-14 03:30:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:30:28,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:30:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:30:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:30:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:30:28,778 INFO L87 Difference]: Start difference. First operand 9372 states and 13929 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:30:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:30:29,411 INFO L93 Difference]: Finished difference Result 14234 states and 20611 transitions. [2024-11-14 03:30:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:30:29,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2024-11-14 03:30:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:30:29,449 INFO L225 Difference]: With dead ends: 14234 [2024-11-14 03:30:29,449 INFO L226 Difference]: Without dead ends: 10086 [2024-11-14 03:30:29,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 03:30:29,460 INFO L432 NwaCegarLoop]: 3197 mSDtfsCounter, 3399 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:30:29,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3226 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:30:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2024-11-14 03:30:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 10086. [2024-11-14 03:30:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 8988 states have (on average 1.4978860703159769) internal successors, (13463), 9007 states have internal predecessors, (13463), 631 states have call successors, (631), 466 states have call predecessors, (631), 465 states have return successors, (629), 613 states have call predecessors, (629), 629 states have call successors, (629) [2024-11-14 03:30:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 14723 transitions. [2024-11-14 03:30:29,858 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 14723 transitions. Word has length 124 [2024-11-14 03:30:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:30:29,858 INFO L471 AbstractCegarLoop]: Abstraction has 10086 states and 14723 transitions. [2024-11-14 03:30:29,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:30:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 14723 transitions. [2024-11-14 03:30:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 03:30:29,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:30:29,883 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:30:29,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:30:30,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:30:30,084 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:30:30,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:30:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash 851691902, now seen corresponding path program 2 times [2024-11-14 03:30:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:30:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570809206] [2024-11-14 03:30:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:30:30,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:30:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:30:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:30:30,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:30:30,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570809206] [2024-11-14 03:30:30,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570809206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:30:30,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033883635] [2024-11-14 03:30:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:30:30,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:30:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:30:30,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:30:30,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:30:30,502 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:30:30,502 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:30:30,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:30:30,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:30:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:30:30,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:30:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 03:30:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033883635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:30:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313976689] [2024-11-14 03:30:31,695 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2024-11-14 03:30:31,696 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:30:31,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:30:31,711 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:30:31,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:30:39,555 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 139 for LOIs [2024-11-14 03:30:39,672 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2024-11-14 03:30:40,247 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2024-11-14 03:32:04,914 WARN L286 SmtUtils]: Spent 1.39m on a formula simplification that was a NOOP. DAG size: 1128 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 03:33:26,702 WARN L286 SmtUtils]: Spent 1.36m on a formula simplification that was a NOOP. DAG size: 1128 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 03:33:26,716 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 139 for LOIs [2024-11-14 03:33:26,759 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 119 for LOIs [2024-11-14 03:33:26,774 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 72 for LOIs [2024-11-14 03:33:26,829 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 101 for LOIs [2024-11-14 03:33:27,051 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 176 for LOIs [2024-11-14 03:33:28,851 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:39:02,009 WARN L286 SmtUtils]: Spent 5.36m on a formula simplification. DAG size of input: 1128 DAG size of output: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:39:10,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1313976689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:39:10,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:39:10,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [6, 7, 6] total 46 [2024-11-14 03:39:10,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648892724] [2024-11-14 03:39:10,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:39:10,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 03:39:10,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:39:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 03:39:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:39:10,794 INFO L87 Difference]: Start difference. First operand 10086 states and 14723 transitions. Second operand has 35 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-14 03:40:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:40:03,924 INFO L93 Difference]: Finished difference Result 19392 states and 27287 transitions. [2024-11-14 03:40:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-14 03:40:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 124 [2024-11-14 03:40:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:40:03,961 INFO L225 Difference]: With dead ends: 19392 [2024-11-14 03:40:03,961 INFO L226 Difference]: Without dead ends: 10862 [2024-11-14 03:40:03,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 302 SyntacticMatches, 36 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 367.2s TimeCoverageRelationStatistics Valid=1448, Invalid=11892, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 03:40:03,977 INFO L432 NwaCegarLoop]: 3288 mSDtfsCounter, 948 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 17379 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 5328 SdHoareTripleChecker+Invalid, 17660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 17379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:40:03,978 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 5328 Invalid, 17660 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [281 Valid, 17379 Invalid, 0 Unknown, 0 Unchecked, 26.9s Time] [2024-11-14 03:40:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10862 states. [2024-11-14 03:40:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10862 to 10537. [2024-11-14 03:40:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10537 states, 9354 states have (on average 1.4868505452212957) internal successors, (13908), 9373 states have internal predecessors, (13908), 677 states have call successors, (677), 506 states have call predecessors, (677), 504 states have return successors, (677), 658 states have call predecessors, (677), 675 states have call successors, (677) [2024-11-14 03:40:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10537 states to 10537 states and 15262 transitions. [2024-11-14 03:40:04,541 INFO L78 Accepts]: Start accepts. Automaton has 10537 states and 15262 transitions. Word has length 124 [2024-11-14 03:40:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:40:04,542 INFO L471 AbstractCegarLoop]: Abstraction has 10537 states and 15262 transitions. [2024-11-14 03:40:04,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-14 03:40:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10537 states and 15262 transitions. [2024-11-14 03:40:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-14 03:40:04,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:04,563 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:40:04,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 03:40:04,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:04,767 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:04,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2099372986, now seen corresponding path program 1 times [2024-11-14 03:40:04,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:04,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276267559] [2024-11-14 03:40:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 03:40:04,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276267559] [2024-11-14 03:40:04,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276267559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:40:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608563458] [2024-11-14 03:40:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:04,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:40:04,997 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:40:05,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:40:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:05,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:40:05,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:40:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:40:05,295 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:40:05,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608563458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:40:05,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:40:05,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-14 03:40:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044844293] [2024-11-14 03:40:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:40:05,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:40:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:40:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:40:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:40:05,298 INFO L87 Difference]: Start difference. First operand 10537 states and 15262 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 03:40:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:40:06,498 INFO L93 Difference]: Finished difference Result 18420 states and 25967 transitions. [2024-11-14 03:40:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:40:06,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2024-11-14 03:40:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:40:06,562 INFO L225 Difference]: With dead ends: 18420 [2024-11-14 03:40:06,562 INFO L226 Difference]: Without dead ends: 13179 [2024-11-14 03:40:06,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:40:06,576 INFO L432 NwaCegarLoop]: 3269 mSDtfsCounter, 6750 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6750 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:40:06,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6750 Valid, 3390 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:40:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13179 states. [2024-11-14 03:40:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13179 to 12421. [2024-11-14 03:40:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12421 states, 11043 states have (on average 1.4581182649642308) internal successors, (16102), 11067 states have internal predecessors, (16102), 763 states have call successors, (763), 615 states have call predecessors, (763), 613 states have return successors, (796), 739 states have call predecessors, (796), 761 states have call successors, (796) [2024-11-14 03:40:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12421 states to 12421 states and 17661 transitions. [2024-11-14 03:40:07,370 INFO L78 Accepts]: Start accepts. Automaton has 12421 states and 17661 transitions. Word has length 127 [2024-11-14 03:40:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:40:07,370 INFO L471 AbstractCegarLoop]: Abstraction has 12421 states and 17661 transitions. [2024-11-14 03:40:07,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 03:40:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 12421 states and 17661 transitions. [2024-11-14 03:40:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:40:07,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:07,386 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:40:07,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:40:07,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:07,587 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:07,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:07,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1986036032, now seen corresponding path program 1 times [2024-11-14 03:40:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:07,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089216301] [2024-11-14 03:40:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 03:40:07,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:07,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089216301] [2024-11-14 03:40:07,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089216301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:40:07,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399712248] [2024-11-14 03:40:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:07,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:40:07,828 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:40:07,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:40:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:07,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:40:07,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:40:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:40:08,081 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:40:08,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399712248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:40:08,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:40:08,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 03:40:08,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930114053] [2024-11-14 03:40:08,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:40:08,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:40:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:40:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:40:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:40:08,082 INFO L87 Difference]: Start difference. First operand 12421 states and 17661 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:40:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:40:09,625 INFO L93 Difference]: Finished difference Result 21994 states and 30612 transitions. [2024-11-14 03:40:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:40:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 128 [2024-11-14 03:40:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:40:09,694 INFO L225 Difference]: With dead ends: 21994 [2024-11-14 03:40:09,694 INFO L226 Difference]: Without dead ends: 15259 [2024-11-14 03:40:09,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:40:09,713 INFO L432 NwaCegarLoop]: 3250 mSDtfsCounter, 107 mSDsluCounter, 6380 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 9630 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:40:09,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 9630 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:40:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15259 states. [2024-11-14 03:40:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15259 to 13904. [2024-11-14 03:40:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13904 states, 12205 states have (on average 1.4390823433019255) internal successors, (17564), 12216 states have internal predecessors, (17564), 967 states have call successors, (967), 753 states have call predecessors, (967), 730 states have return successors, (1038), 935 states have call predecessors, (1038), 965 states have call successors, (1038) [2024-11-14 03:40:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13904 states to 13904 states and 19569 transitions. [2024-11-14 03:40:10,654 INFO L78 Accepts]: Start accepts. Automaton has 13904 states and 19569 transitions. Word has length 128 [2024-11-14 03:40:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:40:10,655 INFO L471 AbstractCegarLoop]: Abstraction has 13904 states and 19569 transitions. [2024-11-14 03:40:10,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:40:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 13904 states and 19569 transitions. [2024-11-14 03:40:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-14 03:40:10,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:10,671 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:40:10,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:40:10,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:10,875 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:10,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1225295907, now seen corresponding path program 1 times [2024-11-14 03:40:10,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:10,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868989743] [2024-11-14 03:40:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:10,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 03:40:10,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:10,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868989743] [2024-11-14 03:40:10,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868989743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:40:10,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:40:10,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:40:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515245498] [2024-11-14 03:40:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:40:10,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:40:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:40:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:40:10,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:40:10,967 INFO L87 Difference]: Start difference. First operand 13904 states and 19569 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:40:12,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:40:12,376 INFO L93 Difference]: Finished difference Result 21069 states and 29550 transitions. [2024-11-14 03:40:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:40:12,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 133 [2024-11-14 03:40:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:40:12,503 INFO L225 Difference]: With dead ends: 21069 [2024-11-14 03:40:12,503 INFO L226 Difference]: Without dead ends: 13932 [2024-11-14 03:40:12,513 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 03:40:12,514 INFO L432 NwaCegarLoop]: 3290 mSDtfsCounter, 3537 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 6514 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:40:12,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 6514 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:40:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13932 states. [2024-11-14 03:40:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13932 to 13752. [2024-11-14 03:40:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13752 states, 12053 states have (on average 1.422799303078072) internal successors, (17149), 12064 states have internal predecessors, (17149), 967 states have call successors, (967), 753 states have call predecessors, (967), 730 states have return successors, (1038), 935 states have call predecessors, (1038), 965 states have call successors, (1038) [2024-11-14 03:40:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13752 states to 13752 states and 19154 transitions. [2024-11-14 03:40:13,365 INFO L78 Accepts]: Start accepts. Automaton has 13752 states and 19154 transitions. Word has length 133 [2024-11-14 03:40:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:40:13,366 INFO L471 AbstractCegarLoop]: Abstraction has 13752 states and 19154 transitions. [2024-11-14 03:40:13,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 03:40:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13752 states and 19154 transitions. [2024-11-14 03:40:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-14 03:40:13,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:13,383 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:40:13,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 03:40:13,383 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:13,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2144270530, now seen corresponding path program 1 times [2024-11-14 03:40:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539992341] [2024-11-14 03:40:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-14 03:40:13,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539992341] [2024-11-14 03:40:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539992341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:40:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283719183] [2024-11-14 03:40:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:13,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:40:13,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:40:13,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:40:13,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:40:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:13,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 03:40:13,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:40:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 52 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 03:40:14,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:40:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 39 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-14 03:40:14,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283719183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:40:14,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358077836] [2024-11-14 03:40:14,747 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2024-11-14 03:40:14,747 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:40:14,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:40:14,748 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:40:14,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:40:37,981 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 65 for LOIs [2024-11-14 03:40:37,986 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 194 for LOIs [2024-11-14 03:40:38,285 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 155 for LOIs [2024-11-14 03:40:38,422 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 124 for LOIs [2024-11-14 03:40:38,488 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 56 for LOIs [2024-11-14 03:40:38,514 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 131 for LOIs [2024-11-14 03:40:39,349 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2024-11-14 03:40:39,524 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:41:08,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357001#(and (= ~a15~0 1) (= 5 ~a20~0) (<= 1 |#StackHeapBarrier|) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ ~local~0 4))) (= ~a~0 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= ~a27~0 1) (= ~t3_i~0 1) (= ~t4_i~0 1) (= ~a2~0 10))' at error location [2024-11-14 03:41:08,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:41:08,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:41:08,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-14 03:41:08,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067017319] [2024-11-14 03:41:08,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:41:08,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:41:08,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:41:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=4522, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 03:41:08,284 INFO L87 Difference]: Start difference. First operand 13752 states and 19154 transitions. Second operand has 21 states, 14 states have (on average 14.571428571428571) internal successors, (204), 16 states have internal predecessors, (204), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 03:41:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:12,817 INFO L93 Difference]: Finished difference Result 35205 states and 47422 transitions. [2024-11-14 03:41:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 03:41:12,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 14.571428571428571) internal successors, (204), 16 states have internal predecessors, (204), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 133 [2024-11-14 03:41:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:12,901 INFO L225 Difference]: With dead ends: 35205 [2024-11-14 03:41:12,901 INFO L226 Difference]: Without dead ends: 23270 [2024-11-14 03:41:12,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 349 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=1036, Invalid=9064, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 03:41:12,927 INFO L432 NwaCegarLoop]: 3194 mSDtfsCounter, 11469 mSDsluCounter, 25360 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11469 SdHoareTripleChecker+Valid, 28554 SdHoareTripleChecker+Invalid, 3840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:12,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11469 Valid, 28554 Invalid, 3840 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [569 Valid, 3271 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 03:41:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23270 states. [2024-11-14 03:41:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23270 to 22127. [2024-11-14 03:41:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22127 states, 19258 states have (on average 1.3758438051718767) internal successors, (26496), 19286 states have internal predecessors, (26496), 1607 states have call successors, (1607), 1262 states have call predecessors, (1607), 1260 states have return successors, (1607), 1579 states have call predecessors, (1607), 1605 states have call successors, (1607) [2024-11-14 03:41:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22127 states to 22127 states and 29710 transitions. [2024-11-14 03:41:14,270 INFO L78 Accepts]: Start accepts. Automaton has 22127 states and 29710 transitions. Word has length 133 [2024-11-14 03:41:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:14,270 INFO L471 AbstractCegarLoop]: Abstraction has 22127 states and 29710 transitions. [2024-11-14 03:41:14,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 14.571428571428571) internal successors, (204), 16 states have internal predecessors, (204), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-14 03:41:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 22127 states and 29710 transitions. [2024-11-14 03:41:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 03:41:14,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:14,288 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-14 03:41:14,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:41:14,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:41:14,489 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:14,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1872631790, now seen corresponding path program 1 times [2024-11-14 03:41:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424896134] [2024-11-14 03:41:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 03:41:14,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424896134] [2024-11-14 03:41:14,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424896134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579065137] [2024-11-14 03:41:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:14,686 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:41:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:14,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:41:14,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:41:14,903 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:14,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579065137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:14,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:14,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-14 03:41:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602485771] [2024-11-14 03:41:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:14,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:41:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:41:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:41:14,905 INFO L87 Difference]: Start difference. First operand 22127 states and 29710 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 03:41:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:16,670 INFO L93 Difference]: Finished difference Result 31312 states and 41667 transitions. [2024-11-14 03:41:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:41:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 131 [2024-11-14 03:41:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:16,762 INFO L225 Difference]: With dead ends: 31312 [2024-11-14 03:41:16,762 INFO L226 Difference]: Without dead ends: 22604 [2024-11-14 03:41:16,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:41:16,782 INFO L432 NwaCegarLoop]: 3267 mSDtfsCounter, 3386 mSDsluCounter, 3385 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 6652 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:16,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 6652 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:41:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2024-11-14 03:41:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 22379. [2024-11-14 03:41:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22379 states, 19474 states have (on average 1.3738317757009346) internal successors, (26754), 19520 states have internal predecessors, (26754), 1607 states have call successors, (1607), 1262 states have call predecessors, (1607), 1296 states have return successors, (1643), 1597 states have call predecessors, (1643), 1605 states have call successors, (1643) [2024-11-14 03:41:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22379 states to 22379 states and 30004 transitions. [2024-11-14 03:41:18,138 INFO L78 Accepts]: Start accepts. Automaton has 22379 states and 30004 transitions. Word has length 131 [2024-11-14 03:41:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:18,139 INFO L471 AbstractCegarLoop]: Abstraction has 22379 states and 30004 transitions. [2024-11-14 03:41:18,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 03:41:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 22379 states and 30004 transitions. [2024-11-14 03:41:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-14 03:41:18,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:18,158 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2024-11-14 03:41:18,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:41:18,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:41:18,358 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:18,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1198242129, now seen corresponding path program 1 times [2024-11-14 03:41:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:18,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115594684] [2024-11-14 03:41:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:18,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:41:18,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115594684] [2024-11-14 03:41:18,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115594684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569975413] [2024-11-14 03:41:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:18,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:18,548 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:18,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:41:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:18,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:41:18,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 03:41:18,730 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:18,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569975413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:18,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:18,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:41:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70739440] [2024-11-14 03:41:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:18,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:41:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:41:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:41:18,732 INFO L87 Difference]: Start difference. First operand 22379 states and 30004 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:41:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:20,102 INFO L93 Difference]: Finished difference Result 30863 states and 41061 transitions. [2024-11-14 03:41:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:41:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 132 [2024-11-14 03:41:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:20,168 INFO L225 Difference]: With dead ends: 30863 [2024-11-14 03:41:20,168 INFO L226 Difference]: Without dead ends: 21652 [2024-11-14 03:41:20,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 03:41:20,188 INFO L432 NwaCegarLoop]: 3196 mSDtfsCounter, 27 mSDsluCounter, 3178 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6374 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:20,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6374 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:41:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21652 states. [2024-11-14 03:41:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21652 to 21169. [2024-11-14 03:41:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 18408 states have (on average 1.3771729682746632) internal successors, (25351), 18430 states have internal predecessors, (25351), 1553 states have call successors, (1553), 1208 states have call predecessors, (1553), 1206 states have return successors, (1553), 1531 states have call predecessors, (1553), 1551 states have call successors, (1553) [2024-11-14 03:41:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 28457 transitions. [2024-11-14 03:41:21,355 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 28457 transitions. Word has length 132 [2024-11-14 03:41:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:21,355 INFO L471 AbstractCegarLoop]: Abstraction has 21169 states and 28457 transitions. [2024-11-14 03:41:21,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:41:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 28457 transitions. [2024-11-14 03:41:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-14 03:41:21,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:21,372 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:41:21,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:41:21,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:21,572 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:21,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1624015894, now seen corresponding path program 1 times [2024-11-14 03:41:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234267397] [2024-11-14 03:41:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 03:41:21,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:21,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234267397] [2024-11-14 03:41:21,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234267397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:21,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259696650] [2024-11-14 03:41:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:21,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:21,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:21,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:41:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:21,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:41:21,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:41:22,014 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259696650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:22,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:22,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:41:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954756665] [2024-11-14 03:41:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:22,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:41:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:41:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:41:22,016 INFO L87 Difference]: Start difference. First operand 21169 states and 28457 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:41:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:23,373 INFO L93 Difference]: Finished difference Result 35901 states and 47599 transitions. [2024-11-14 03:41:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:41:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 133 [2024-11-14 03:41:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:23,454 INFO L225 Difference]: With dead ends: 35901 [2024-11-14 03:41:23,454 INFO L226 Difference]: Without dead ends: 23091 [2024-11-14 03:41:23,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 135 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 03:41:23,482 INFO L432 NwaCegarLoop]: 3201 mSDtfsCounter, 3365 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3365 SdHoareTripleChecker+Valid, 3236 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:23,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3365 Valid, 3236 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:41:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23091 states. [2024-11-14 03:41:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23091 to 22812. [2024-11-14 03:41:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22812 states, 19914 states have (on average 1.3532690569448629) internal successors, (26949), 19936 states have internal predecessors, (26949), 1582 states have call successors, (1582), 1316 states have call predecessors, (1582), 1314 states have return successors, (1686), 1560 states have call predecessors, (1686), 1580 states have call successors, (1686) [2024-11-14 03:41:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22812 states to 22812 states and 30217 transitions. [2024-11-14 03:41:24,619 INFO L78 Accepts]: Start accepts. Automaton has 22812 states and 30217 transitions. Word has length 133 [2024-11-14 03:41:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:24,619 INFO L471 AbstractCegarLoop]: Abstraction has 22812 states and 30217 transitions. [2024-11-14 03:41:24,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 03:41:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22812 states and 30217 transitions. [2024-11-14 03:41:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-14 03:41:24,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:24,637 INFO L215 NwaCegarLoop]: trace histogram [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 03:41:24,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:41:24,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:24,838 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:24,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash 461530104, now seen corresponding path program 1 times [2024-11-14 03:41:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:24,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379580486] [2024-11-14 03:41:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:24,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:41:25,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379580486] [2024-11-14 03:41:25,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379580486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:25,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057535084] [2024-11-14 03:41:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:25,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:25,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:25,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:25,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:41:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:25,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:41:25,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:41:25,251 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:25,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057535084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:25,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:25,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 03:41:25,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362255522] [2024-11-14 03:41:25,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:25,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:41:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:41:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:41:25,252 INFO L87 Difference]: Start difference. First operand 22812 states and 30217 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 03:41:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:27,650 INFO L93 Difference]: Finished difference Result 48228 states and 62722 transitions. [2024-11-14 03:41:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:41:27,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 135 [2024-11-14 03:41:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:27,733 INFO L225 Difference]: With dead ends: 48228 [2024-11-14 03:41:27,733 INFO L226 Difference]: Without dead ends: 34167 [2024-11-14 03:41:27,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:41:27,762 INFO L432 NwaCegarLoop]: 3262 mSDtfsCounter, 118 mSDsluCounter, 9529 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 12791 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:27,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 12791 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:41:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34167 states. [2024-11-14 03:41:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34167 to 31441. [2024-11-14 03:41:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31441 states, 27091 states have (on average 1.3161197445646156) internal successors, (35655), 27100 states have internal predecessors, (35655), 2421 states have call successors, (2421), 1960 states have call predecessors, (2421), 1927 states have return successors, (2733), 2381 states have call predecessors, (2733), 2419 states have call successors, (2733) [2024-11-14 03:41:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31441 states to 31441 states and 40809 transitions. [2024-11-14 03:41:30,046 INFO L78 Accepts]: Start accepts. Automaton has 31441 states and 40809 transitions. Word has length 135 [2024-11-14 03:41:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:30,047 INFO L471 AbstractCegarLoop]: Abstraction has 31441 states and 40809 transitions. [2024-11-14 03:41:30,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-14 03:41:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 31441 states and 40809 transitions. [2024-11-14 03:41:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-14 03:41:30,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:30,077 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:41:30,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:41:30,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:30,278 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:30,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash 124349349, now seen corresponding path program 1 times [2024-11-14 03:41:30,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:30,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947529356] [2024-11-14 03:41:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:30,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 03:41:30,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947529356] [2024-11-14 03:41:30,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947529356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:30,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255702694] [2024-11-14 03:41:30,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:30,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:30,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:30,385 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:30,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:41:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:30,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:41:30,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 03:41:30,610 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:30,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255702694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:30,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2024-11-14 03:41:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857293625] [2024-11-14 03:41:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:30,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:41:30,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:41:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:41:30,612 INFO L87 Difference]: Start difference. First operand 31441 states and 40809 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:41:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:32,464 INFO L93 Difference]: Finished difference Result 49613 states and 64860 transitions. [2024-11-14 03:41:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:41:32,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 166 [2024-11-14 03:41:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:32,534 INFO L225 Difference]: With dead ends: 49613 [2024-11-14 03:41:32,534 INFO L226 Difference]: Without dead ends: 31410 [2024-11-14 03:41:32,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 167 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 03:41:32,562 INFO L432 NwaCegarLoop]: 3275 mSDtfsCounter, 110 mSDsluCounter, 3173 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6448 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:32,562 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6448 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:41:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31410 states. [2024-11-14 03:41:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31410 to 31074. [2024-11-14 03:41:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31074 states, 26759 states have (on average 1.2935460966403827) internal successors, (34614), 26767 states have internal predecessors, (34614), 2401 states have call successors, (2401), 1944 states have call predecessors, (2401), 1912 states have return successors, (2711), 2363 states have call predecessors, (2711), 2399 states have call successors, (2711) [2024-11-14 03:41:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31074 states to 31074 states and 39726 transitions. [2024-11-14 03:41:34,192 INFO L78 Accepts]: Start accepts. Automaton has 31074 states and 39726 transitions. Word has length 166 [2024-11-14 03:41:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:34,193 INFO L471 AbstractCegarLoop]: Abstraction has 31074 states and 39726 transitions. [2024-11-14 03:41:34,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:41:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31074 states and 39726 transitions. [2024-11-14 03:41:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-14 03:41:34,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:34,222 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:41:34,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 03:41:34,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:34,423 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:34,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash -227935847, now seen corresponding path program 1 times [2024-11-14 03:41:34,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:34,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188704916] [2024-11-14 03:41:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:34,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 23 proven. 72 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:41:34,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188704916] [2024-11-14 03:41:34,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188704916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:34,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123264864] [2024-11-14 03:41:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:34,700 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:34,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:41:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:34,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:41:34,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 03:41:34,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:34,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123264864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:34,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:34,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 03:41:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308506422] [2024-11-14 03:41:34,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:34,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:41:34,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:34,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:41:34,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:41:34,971 INFO L87 Difference]: Start difference. First operand 31074 states and 39726 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:41:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:37,133 INFO L93 Difference]: Finished difference Result 45372 states and 57772 transitions. [2024-11-14 03:41:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:41:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 168 [2024-11-14 03:41:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:37,222 INFO L225 Difference]: With dead ends: 45372 [2024-11-14 03:41:37,222 INFO L226 Difference]: Without dead ends: 33138 [2024-11-14 03:41:37,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 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 03:41:37,247 INFO L432 NwaCegarLoop]: 3202 mSDtfsCounter, 3360 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3360 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:37,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3360 Valid, 3237 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:41:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33138 states. [2024-11-14 03:41:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33138 to 32556. [2024-11-14 03:41:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32556 states, 28095 states have (on average 1.2815803523758675) internal successors, (36006), 28137 states have internal predecessors, (36006), 2417 states have call successors, (2417), 2024 states have call predecessors, (2417), 2042 states have return successors, (2823), 2395 states have call predecessors, (2823), 2415 states have call successors, (2823) [2024-11-14 03:41:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32556 states to 32556 states and 41246 transitions. [2024-11-14 03:41:40,035 INFO L78 Accepts]: Start accepts. Automaton has 32556 states and 41246 transitions. Word has length 168 [2024-11-14 03:41:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:40,035 INFO L471 AbstractCegarLoop]: Abstraction has 32556 states and 41246 transitions. [2024-11-14 03:41:40,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-14 03:41:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 32556 states and 41246 transitions. [2024-11-14 03:41:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-14 03:41:40,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:40,071 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:41:40,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:41:40,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:40,271 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:40,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash -342288886, now seen corresponding path program 1 times [2024-11-14 03:41:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:40,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750848025] [2024-11-14 03:41:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 23 proven. 74 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:41:40,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:40,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750848025] [2024-11-14 03:41:40,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750848025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:40,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768135645] [2024-11-14 03:41:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:40,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:40,644 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:40,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:41:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:40,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:41:40,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:41:40,907 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:40,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768135645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:40,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:40,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-14 03:41:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107279588] [2024-11-14 03:41:40,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:40,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:41:40,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:41:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:41:40,909 INFO L87 Difference]: Start difference. First operand 32556 states and 41246 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-14 03:41:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:43,722 INFO L93 Difference]: Finished difference Result 59948 states and 75132 transitions. [2024-11-14 03:41:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:41:43,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 169 [2024-11-14 03:41:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:43,815 INFO L225 Difference]: With dead ends: 59948 [2024-11-14 03:41:43,815 INFO L226 Difference]: Without dead ends: 41642 [2024-11-14 03:41:43,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:41:43,838 INFO L432 NwaCegarLoop]: 3256 mSDtfsCounter, 114 mSDsluCounter, 6370 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 9626 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:43,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 9626 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:41:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41642 states. [2024-11-14 03:41:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41642 to 38552. [2024-11-14 03:41:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38552 states, 33021 states have (on average 1.2596832318827413) internal successors, (41596), 33083 states have internal predecessors, (41596), 3019 states have call successors, (3019), 2494 states have call predecessors, (3019), 2510 states have return successors, (3623), 2975 states have call predecessors, (3623), 3017 states have call successors, (3623) [2024-11-14 03:41:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38552 states to 38552 states and 48238 transitions. [2024-11-14 03:41:46,275 INFO L78 Accepts]: Start accepts. Automaton has 38552 states and 48238 transitions. Word has length 169 [2024-11-14 03:41:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:46,275 INFO L471 AbstractCegarLoop]: Abstraction has 38552 states and 48238 transitions. [2024-11-14 03:41:46,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-14 03:41:46,275 INFO L276 IsEmpty]: Start isEmpty. Operand 38552 states and 48238 transitions. [2024-11-14 03:41:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-14 03:41:46,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:46,296 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:41:46,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-14 03:41:46,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:46,496 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:46,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:46,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1388164625, now seen corresponding path program 1 times [2024-11-14 03:41:46,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:46,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766239913] [2024-11-14 03:41:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:46,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 67 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-11-14 03:41:46,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766239913] [2024-11-14 03:41:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766239913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312508982] [2024-11-14 03:41:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:46,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:46,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:46,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:46,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:41:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:47,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:41:47,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 03:41:47,111 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312508982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:47,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:47,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2024-11-14 03:41:47,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754381804] [2024-11-14 03:41:47,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:47,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:41:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:47,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:41:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:41:47,113 INFO L87 Difference]: Start difference. First operand 38552 states and 48238 transitions. Second operand has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-14 03:41:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:50,889 INFO L93 Difference]: Finished difference Result 62919 states and 78228 transitions. [2024-11-14 03:41:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:41:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 177 [2024-11-14 03:41:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:51,002 INFO L225 Difference]: With dead ends: 62919 [2024-11-14 03:41:51,002 INFO L226 Difference]: Without dead ends: 40280 [2024-11-14 03:41:51,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:41:51,041 INFO L432 NwaCegarLoop]: 3246 mSDtfsCounter, 97 mSDsluCounter, 12911 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 16157 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:51,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 16157 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:41:51,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40280 states. [2024-11-14 03:41:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40280 to 38421. [2024-11-14 03:41:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38421 states, 32972 states have (on average 1.260584738566056) internal successors, (41564), 33031 states have internal predecessors, (41564), 2968 states have call successors, (2968), 2463 states have call predecessors, (2968), 2479 states have return successors, (3564), 2927 states have call predecessors, (3564), 2966 states have call successors, (3564) [2024-11-14 03:41:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38421 states to 38421 states and 48096 transitions. [2024-11-14 03:41:54,045 INFO L78 Accepts]: Start accepts. Automaton has 38421 states and 48096 transitions. Word has length 177 [2024-11-14 03:41:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:54,046 INFO L471 AbstractCegarLoop]: Abstraction has 38421 states and 48096 transitions. [2024-11-14 03:41:54,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-14 03:41:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38421 states and 48096 transitions. [2024-11-14 03:41:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-14 03:41:54,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:54,065 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:41:54,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:41:54,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 03:41:54,265 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:54,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:54,266 INFO L85 PathProgramCache]: Analyzing trace with hash -290147398, now seen corresponding path program 1 times [2024-11-14 03:41:54,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:54,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984865919] [2024-11-14 03:41:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:54,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 03:41:54,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984865919] [2024-11-14 03:41:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984865919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:54,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979338686] [2024-11-14 03:41:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:54,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:54,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:54,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de4ef2e3-7668-4c65-b9dd-39a203bbcda2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:41:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:54,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 03:41:54,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:41:55,186 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:55,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979338686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:55,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:55,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-11-14 03:41:55,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80661709] [2024-11-14 03:41:55,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:55,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:41:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:41:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:41:55,188 INFO L87 Difference]: Start difference. First operand 38421 states and 48096 transitions. Second operand has 9 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 3 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17)