./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX --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 954b1f05390ccaafb1cee97c6b5216f4167723fe344c33082a0f73951b4d6f58 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:49:29,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:49:29,243 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:49:29,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:49:29,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:49:29,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:49:29,304 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:49:29,304 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:49:29,306 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:49:29,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:49:29,312 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:49:29,313 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:49:29,314 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:49:29,316 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:49:29,316 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:49:29,317 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:49:29,318 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:49:29,318 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:49:29,319 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:49:29,320 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:49:29,322 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:49:29,323 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:49:29,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:49:29,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:49:29,325 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:49:29,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:49:29,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:49:29,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:49:29,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:49:29,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:49:29,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:49:29,331 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:49:29,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:49:29,331 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:49:29,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:49:29,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:49:29,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:49:29,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:49:29,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:49:29,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:49:29,334 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:49:29,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:49:29,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:49:29,336 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:49:29,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:49:29,337 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 954b1f05390ccaafb1cee97c6b5216f4167723fe344c33082a0f73951b4d6f58 [2023-11-12 00:49:29,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:49:29,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:49:29,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:49:29,744 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:49:29,746 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:49:29,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c [2023-11-12 00:49:32,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:49:33,763 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:49:33,764 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c [2023-11-12 00:49:33,819 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/data/2e75d92d1/0f78c356bd3e417b87ae20ca8539dbb2/FLAG06532c5a4 [2023-11-12 00:49:33,839 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/data/2e75d92d1/0f78c356bd3e417b87ae20ca8539dbb2 [2023-11-12 00:49:33,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:49:33,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:49:33,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:49:33,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:49:33,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:49:33,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:33" (1/1) ... [2023-11-12 00:49:33,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b1b3d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:33, skipping insertion in model container [2023-11-12 00:49:33,868 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:33" (1/1) ... [2023-11-12 00:49:34,147 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:49:36,651 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[378560,378573] [2023-11-12 00:49:36,686 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[383339,383352] [2023-11-12 00:49:36,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:49:36,909 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:49:38,251 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[378560,378573] [2023-11-12 00:49:38,261 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[383339,383352] [2023-11-12 00:49:38,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:49:38,406 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:49:38,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38 WrapperNode [2023-11-12 00:49:38,408 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:49:38,409 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:49:38,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:49:38,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:49:38,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:38,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:38,933 INFO L138 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12634 [2023-11-12 00:49:38,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:49:38,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:49:38,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:49:38,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:49:38,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:38,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,322 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,442 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,499 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,547 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:49:39,549 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:49:39,549 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:49:39,549 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:49:39,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (1/1) ... [2023-11-12 00:49:39,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:49:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:39,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:49:39,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:49:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:49:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 00:49:39,710 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 00:49:39,712 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:49:39,713 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:49:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:49:39,713 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:49:39,713 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:49:39,714 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:49:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:49:39,714 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:49:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:49:39,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:49:39,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:49:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:49:39,715 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:49:39,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:49:39,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:49:39,836 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:49:39,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:49:49,194 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:49:51,674 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:49:51,675 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 00:49:51,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:49:51 BoogieIcfgContainer [2023-11-12 00:49:51,682 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:49:51,684 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:49:51,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:49:51,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:49:51,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:49:33" (1/3) ... [2023-11-12 00:49:51,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5a056d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:49:51, skipping insertion in model container [2023-11-12 00:49:51,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:38" (2/3) ... [2023-11-12 00:49:51,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5a056d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:49:51, skipping insertion in model container [2023-11-12 00:49:51,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:49:51" (3/3) ... [2023-11-12 00:49:51,694 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.02.cil-2.c [2023-11-12 00:49:51,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:49:51,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:49:51,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:49:51,839 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@30275f31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:49:51,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:49:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-12 00:49:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 00:49:51,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:51,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:51,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:51,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1657494942, now seen corresponding path program 1 times [2023-11-12 00:49:51,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:51,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867080100] [2023-11-12 00:49:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:51,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:52,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:52,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867080100] [2023-11-12 00:49:52,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867080100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:52,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:52,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:49:52,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516032869] [2023-11-12 00:49:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:52,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:52,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:52,422 INFO L87 Difference]: Start difference. First operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:49:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:53,534 INFO L93 Difference]: Finished difference Result 3523 states and 6896 transitions. [2023-11-12 00:49:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:49:53,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 38 [2023-11-12 00:49:53,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:53,568 INFO L225 Difference]: With dead ends: 3523 [2023-11-12 00:49:53,569 INFO L226 Difference]: Without dead ends: 1792 [2023-11-12 00:49:53,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:53,588 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3463 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 6388 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:53,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 6388 Invalid, 584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:49:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2023-11-12 00:49:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1791. [2023-11-12 00:49:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1747 states have (on average 1.953062392673154) internal successors, (3412), 1751 states have internal predecessors, (3412), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-12 00:49:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 3470 transitions. [2023-11-12 00:49:53,752 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 3470 transitions. Word has length 38 [2023-11-12 00:49:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:53,753 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 3470 transitions. [2023-11-12 00:49:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:49:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 3470 transitions. [2023-11-12 00:49:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:49:53,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:53,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:53,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:49:53,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1648218271, now seen corresponding path program 1 times [2023-11-12 00:49:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:53,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495089574] [2023-11-12 00:49:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:49:53,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495089574] [2023-11-12 00:49:53,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495089574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108795820] [2023-11-12 00:49:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:53,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:53,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:53,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:53,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:49:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:54,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:49:54,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:49:54,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:54,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108795820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:54,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:54,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:49:54,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726688044] [2023-11-12 00:49:54,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:54,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:54,167 INFO L87 Difference]: Start difference. First operand 1791 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:49:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:54,669 INFO L93 Difference]: Finished difference Result 2074 states and 3857 transitions. [2023-11-12 00:49:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 68 [2023-11-12 00:49:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:54,684 INFO L225 Difference]: With dead ends: 2074 [2023-11-12 00:49:54,685 INFO L226 Difference]: Without dead ends: 1929 [2023-11-12 00:49:54,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:54,687 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3359 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:54,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3274 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:49:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2023-11-12 00:49:54,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1923. [2023-11-12 00:49:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1845 states have (on average 1.9192411924119241) internal successors, (3541), 1850 states have internal predecessors, (3541), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-12 00:49:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 3643 transitions. [2023-11-12 00:49:54,756 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 3643 transitions. Word has length 68 [2023-11-12 00:49:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:54,756 INFO L495 AbstractCegarLoop]: Abstraction has 1923 states and 3643 transitions. [2023-11-12 00:49:54,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:49:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 3643 transitions. [2023-11-12 00:49:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:49:54,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:54,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:54,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:54,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:54,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:54,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1044487167, now seen corresponding path program 1 times [2023-11-12 00:49:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881256667] [2023-11-12 00:49:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:54,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:49:55,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:55,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881256667] [2023-11-12 00:49:55,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881256667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:55,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:55,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:49:55,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919601989] [2023-11-12 00:49:55,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:55,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:49:55,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:49:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:55,381 INFO L87 Difference]: Start difference. First operand 1923 states and 3643 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 00:49:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:56,427 INFO L93 Difference]: Finished difference Result 2485 states and 4385 transitions. [2023-11-12 00:49:56,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:49:56,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 68 [2023-11-12 00:49:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:56,447 INFO L225 Difference]: With dead ends: 2485 [2023-11-12 00:49:56,447 INFO L226 Difference]: Without dead ends: 2209 [2023-11-12 00:49:56,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:49:56,453 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3513 mSDsluCounter, 9369 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3524 SdHoareTripleChecker+Valid, 12528 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:56,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3524 Valid, 12528 Invalid, 1111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:49:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2023-11-12 00:49:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2171. [2023-11-12 00:49:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2027 states have (on average 1.8623581647755303) internal successors, (3775), 2034 states have internal predecessors, (3775), 94 states have call successors, (94), 49 states have call predecessors, (94), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-12 00:49:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3961 transitions. [2023-11-12 00:49:56,563 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3961 transitions. Word has length 68 [2023-11-12 00:49:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:56,565 INFO L495 AbstractCegarLoop]: Abstraction has 2171 states and 3961 transitions. [2023-11-12 00:49:56,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 00:49:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3961 transitions. [2023-11-12 00:49:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:49:56,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:56,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:49:56,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:56,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash 864211484, now seen corresponding path program 1 times [2023-11-12 00:49:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:56,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744188829] [2023-11-12 00:49:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:49:56,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:56,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744188829] [2023-11-12 00:49:56,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744188829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:56,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:56,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329066563] [2023-11-12 00:49:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:56,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:56,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:56,685 INFO L87 Difference]: Start difference. First operand 2171 states and 3961 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:49:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:57,293 INFO L93 Difference]: Finished difference Result 2584 states and 4508 transitions. [2023-11-12 00:49:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 70 [2023-11-12 00:49:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:57,310 INFO L225 Difference]: With dead ends: 2584 [2023-11-12 00:49:57,310 INFO L226 Difference]: Without dead ends: 2304 [2023-11-12 00:49:57,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:57,313 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 37 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6343 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:57,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6343 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:49:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2023-11-12 00:49:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2241. [2023-11-12 00:49:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2089 states have (on average 1.8492101483963619) internal successors, (3863), 2096 states have internal predecessors, (3863), 98 states have call successors, (98), 53 states have call predecessors, (98), 52 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-12 00:49:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 4057 transitions. [2023-11-12 00:49:57,424 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 4057 transitions. Word has length 70 [2023-11-12 00:49:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:57,425 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 4057 transitions. [2023-11-12 00:49:57,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:49:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 4057 transitions. [2023-11-12 00:49:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-12 00:49:57,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:57,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:57,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:49:57,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:57,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:57,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1458871145, now seen corresponding path program 1 times [2023-11-12 00:49:57,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:57,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003212935] [2023-11-12 00:49:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:49:57,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003212935] [2023-11-12 00:49:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003212935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:57,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45889537] [2023-11-12 00:49:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:57,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:57,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:57,523 INFO L87 Difference]: Start difference. First operand 2241 states and 4057 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:49:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:58,052 INFO L93 Difference]: Finished difference Result 3133 states and 5240 transitions. [2023-11-12 00:49:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:58,053 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, (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 89 [2023-11-12 00:49:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:58,068 INFO L225 Difference]: With dead ends: 3133 [2023-11-12 00:49:58,069 INFO L226 Difference]: Without dead ends: 2538 [2023-11-12 00:49:58,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:58,072 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3351 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3275 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:58,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 3275 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:49:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2023-11-12 00:49:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2528. [2023-11-12 00:49:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2306 states have (on average 1.794882914137034) internal successors, (4139), 2315 states have internal predecessors, (4139), 142 states have call successors, (142), 79 states have call predecessors, (142), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-12 00:49:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 4421 transitions. [2023-11-12 00:49:58,183 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 4421 transitions. Word has length 89 [2023-11-12 00:49:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:58,184 INFO L495 AbstractCegarLoop]: Abstraction has 2528 states and 4421 transitions. [2023-11-12 00:49:58,184 INFO L496 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:49:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 4421 transitions. [2023-11-12 00:49:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:49:58,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:58,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:49:58,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:58,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash 741431372, now seen corresponding path program 1 times [2023-11-12 00:49:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:58,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660852981] [2023-11-12 00:49:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 00:49:58,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:58,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660852981] [2023-11-12 00:49:58,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660852981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:58,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185321991] [2023-11-12 00:49:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:58,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:58,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:58,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:58,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:49:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:58,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:49:58,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:49:58,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:58,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185321991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 00:49:58,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814142311] [2023-11-12 00:49:58,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:58,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:58,580 INFO L87 Difference]: Start difference. First operand 2528 states and 4421 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:49:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:59,203 INFO L93 Difference]: Finished difference Result 3313 states and 5463 transitions. [2023-11-12 00:49:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (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 102 [2023-11-12 00:49:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:59,221 INFO L225 Difference]: With dead ends: 3313 [2023-11-12 00:49:59,221 INFO L226 Difference]: Without dead ends: 2719 [2023-11-12 00:49:59,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:59,225 INFO L413 NwaCegarLoop]: 3188 mSDtfsCounter, 54 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 6340 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:59,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 6340 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:49:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2023-11-12 00:49:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2617. [2023-11-12 00:49:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2383 states have (on average 1.7838858581619808) internal successors, (4251), 2392 states have internal predecessors, (4251), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-12 00:49:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 4545 transitions. [2023-11-12 00:49:59,345 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 4545 transitions. Word has length 102 [2023-11-12 00:49:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:59,346 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 4545 transitions. [2023-11-12 00:49:59,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:49:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 4545 transitions. [2023-11-12 00:49:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:49:59,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:59,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:59,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:59,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:59,557 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:59,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1163724898, now seen corresponding path program 2 times [2023-11-12 00:49:59,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:59,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350966529] [2023-11-12 00:49:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:59,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:49:59,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:59,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350966529] [2023-11-12 00:49:59,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350966529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:59,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470410052] [2023-11-12 00:49:59,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:49:59,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:59,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:59,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:59,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:49:59,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:49:59,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:49:59,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:49:59,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:49:59,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:00,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470410052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:00,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:00,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:50:00,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694471970] [2023-11-12 00:50:00,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:00,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:00,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:00,002 INFO L87 Difference]: Start difference. First operand 2617 states and 4545 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 00:50:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:00,635 INFO L93 Difference]: Finished difference Result 3308 states and 5495 transitions. [2023-11-12 00:50:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 102 [2023-11-12 00:50:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:00,653 INFO L225 Difference]: With dead ends: 3308 [2023-11-12 00:50:00,653 INFO L226 Difference]: Without dead ends: 2625 [2023-11-12 00:50:00,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:00,657 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 95 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:00,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6332 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2023-11-12 00:50:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2613. [2023-11-12 00:50:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2379 states have (on average 1.776796973518285) internal successors, (4227), 2388 states have internal predecessors, (4227), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-12 00:50:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 4521 transitions. [2023-11-12 00:50:00,778 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 4521 transitions. Word has length 102 [2023-11-12 00:50:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:00,778 INFO L495 AbstractCegarLoop]: Abstraction has 2613 states and 4521 transitions. [2023-11-12 00:50:00,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 00:50:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 4521 transitions. [2023-11-12 00:50:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:50:00,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:00,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:00,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:00,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:00,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:00,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash -907894300, now seen corresponding path program 1 times [2023-11-12 00:50:00,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:00,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507890810] [2023-11-12 00:50:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:00,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:50:01,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507890810] [2023-11-12 00:50:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507890810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:01,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403041471] [2023-11-12 00:50:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:01,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:01,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:01,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:01,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:50:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:01,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:50:01,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:50:01,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:01,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403041471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:01,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:01,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:50:01,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801008733] [2023-11-12 00:50:01,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:01,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:01,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:01,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:01,474 INFO L87 Difference]: Start difference. First operand 2613 states and 4521 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 00:50:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:01,988 INFO L93 Difference]: Finished difference Result 3437 states and 5580 transitions. [2023-11-12 00:50:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:01,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2023-11-12 00:50:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:02,007 INFO L225 Difference]: With dead ends: 3437 [2023-11-12 00:50:02,008 INFO L226 Difference]: Without dead ends: 2789 [2023-11-12 00:50:02,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:02,013 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3361 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3361 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:02,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3361 Valid, 3178 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:50:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2023-11-12 00:50:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2789. [2023-11-12 00:50:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2527 states have (on average 1.738425009893154) internal successors, (4393), 2536 states have internal predecessors, (4393), 156 states have call successors, (156), 105 states have call predecessors, (156), 104 states have return successors, (154), 148 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-12 00:50:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 4703 transitions. [2023-11-12 00:50:02,146 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 4703 transitions. Word has length 102 [2023-11-12 00:50:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:02,147 INFO L495 AbstractCegarLoop]: Abstraction has 2789 states and 4703 transitions. [2023-11-12 00:50:02,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 00:50:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 4703 transitions. [2023-11-12 00:50:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:50:02,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:02,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:02,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:02,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:02,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash -259538551, now seen corresponding path program 1 times [2023-11-12 00:50:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:02,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673253635] [2023-11-12 00:50:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:50:02,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:02,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673253635] [2023-11-12 00:50:02,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673253635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:02,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138864433] [2023-11-12 00:50:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:02,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:02,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:02,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:50:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:02,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:50:02,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:50:02,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:02,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138864433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:02,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:02,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:50:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128494919] [2023-11-12 00:50:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:02,890 INFO L87 Difference]: Start difference. First operand 2789 states and 4703 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (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) [2023-11-12 00:50:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:03,625 INFO L93 Difference]: Finished difference Result 4363 states and 6696 transitions. [2023-11-12 00:50:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:03,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (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 103 [2023-11-12 00:50:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:03,671 INFO L225 Difference]: With dead ends: 4363 [2023-11-12 00:50:03,672 INFO L226 Difference]: Without dead ends: 3221 [2023-11-12 00:50:03,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:03,679 INFO L413 NwaCegarLoop]: 3165 mSDtfsCounter, 50 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6298 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:03,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 6298 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2023-11-12 00:50:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 2919. [2023-11-12 00:50:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 2637 states have (on average 1.7235494880546076) internal successors, (4545), 2647 states have internal predecessors, (4545), 166 states have call successors, (166), 115 states have call predecessors, (166), 114 states have return successors, (164), 157 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-12 00:50:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 4875 transitions. [2023-11-12 00:50:03,880 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 4875 transitions. Word has length 103 [2023-11-12 00:50:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:03,880 INFO L495 AbstractCegarLoop]: Abstraction has 2919 states and 4875 transitions. [2023-11-12 00:50:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (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) [2023-11-12 00:50:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 4875 transitions. [2023-11-12 00:50:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-12 00:50:03,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:03,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:03,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:04,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:04,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:04,095 INFO L85 PathProgramCache]: Analyzing trace with hash 512203986, now seen corresponding path program 1 times [2023-11-12 00:50:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74367199] [2023-11-12 00:50:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:50:04,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:04,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74367199] [2023-11-12 00:50:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74367199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:04,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149014683] [2023-11-12 00:50:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:04,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:04,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:04,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:04,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:50:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:04,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:50:04,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:50:04,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:04,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149014683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:04,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:04,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-11-12 00:50:04,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271939414] [2023-11-12 00:50:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:04,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:50:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:50:04,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:04,606 INFO L87 Difference]: Start difference. First operand 2919 states and 4875 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:05,773 INFO L93 Difference]: Finished difference Result 4763 states and 7175 transitions. [2023-11-12 00:50:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:50:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 105 [2023-11-12 00:50:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:05,788 INFO L225 Difference]: With dead ends: 4763 [2023-11-12 00:50:05,788 INFO L226 Difference]: Without dead ends: 3491 [2023-11-12 00:50:05,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:50:05,794 INFO L413 NwaCegarLoop]: 3155 mSDtfsCounter, 6817 mSDsluCounter, 6218 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6828 SdHoareTripleChecker+Valid, 9373 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:05,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6828 Valid, 9373 Invalid, 856 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [117 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:50:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2023-11-12 00:50:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3487. [2023-11-12 00:50:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3487 states, 3077 states have (on average 1.6460838479038025) internal successors, (5065), 3090 states have internal predecessors, (5065), 240 states have call successors, (240), 169 states have call predecessors, (240), 168 states have return successors, (238), 228 states have call predecessors, (238), 238 states have call successors, (238) [2023-11-12 00:50:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 5543 transitions. [2023-11-12 00:50:06,078 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 5543 transitions. Word has length 105 [2023-11-12 00:50:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:06,078 INFO L495 AbstractCegarLoop]: Abstraction has 3487 states and 5543 transitions. [2023-11-12 00:50:06,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 5543 transitions. [2023-11-12 00:50:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-12 00:50:06,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:06,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:06,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:06,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:50:06,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:06,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1605301705, now seen corresponding path program 1 times [2023-11-12 00:50:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:06,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163453784] [2023-11-12 00:50:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-12 00:50:06,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163453784] [2023-11-12 00:50:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163453784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976922334] [2023-11-12 00:50:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:06,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:06,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:06,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:50:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:06,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:50:06,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:50:06,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:06,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976922334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:06,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:06,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-12 00:50:06,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681772721] [2023-11-12 00:50:06,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:06,620 INFO L87 Difference]: Start difference. First operand 3487 states and 5543 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:50:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:07,449 INFO L93 Difference]: Finished difference Result 5154 states and 7638 transitions. [2023-11-12 00:50:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (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 106 [2023-11-12 00:50:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:07,465 INFO L225 Difference]: With dead ends: 5154 [2023-11-12 00:50:07,466 INFO L226 Difference]: Without dead ends: 3926 [2023-11-12 00:50:07,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:07,471 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 57 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6350 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:07,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6350 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:50:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2023-11-12 00:50:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3675. [2023-11-12 00:50:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 3233 states have (on average 1.6285184039591711) internal successors, (5265), 3246 states have internal predecessors, (5265), 256 states have call successors, (256), 185 states have call predecessors, (256), 184 states have return successors, (254), 244 states have call predecessors, (254), 254 states have call successors, (254) [2023-11-12 00:50:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5775 transitions. [2023-11-12 00:50:07,689 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5775 transitions. Word has length 106 [2023-11-12 00:50:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:07,690 INFO L495 AbstractCegarLoop]: Abstraction has 3675 states and 5775 transitions. [2023-11-12 00:50:07,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:50:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5775 transitions. [2023-11-12 00:50:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-12 00:50:07,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:07,696 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:07,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:07,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:50:07,908 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:07,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1899927076, now seen corresponding path program 1 times [2023-11-12 00:50:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:07,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094389945] [2023-11-12 00:50:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:50:08,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:08,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094389945] [2023-11-12 00:50:08,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094389945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:08,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520581405] [2023-11-12 00:50:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:08,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:08,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:08,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:08,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:50:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:08,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 00:50:08,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:50:08,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:08,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520581405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:08,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:08,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-11-12 00:50:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925629906] [2023-11-12 00:50:08,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:08,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:50:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:50:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:08,275 INFO L87 Difference]: Start difference. First operand 3675 states and 5775 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:50:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:08,994 INFO L93 Difference]: Finished difference Result 4542 states and 6845 transitions. [2023-11-12 00:50:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:50:08,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 109 [2023-11-12 00:50:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:09,007 INFO L225 Difference]: With dead ends: 4542 [2023-11-12 00:50:09,007 INFO L226 Difference]: Without dead ends: 3808 [2023-11-12 00:50:09,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:50:09,011 INFO L413 NwaCegarLoop]: 3201 mSDtfsCounter, 3355 mSDsluCounter, 3288 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3355 SdHoareTripleChecker+Valid, 6489 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:09,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3355 Valid, 6489 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2023-11-12 00:50:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3756. [2023-11-12 00:50:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3756 states, 3291 states have (on average 1.620480097234883) internal successors, (5333), 3310 states have internal predecessors, (5333), 263 states have call successors, (263), 189 states have call predecessors, (263), 200 states have return successors, (273), 257 states have call predecessors, (273), 261 states have call successors, (273) [2023-11-12 00:50:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3756 states to 3756 states and 5869 transitions. [2023-11-12 00:50:09,382 INFO L78 Accepts]: Start accepts. Automaton has 3756 states and 5869 transitions. Word has length 109 [2023-11-12 00:50:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:09,382 INFO L495 AbstractCegarLoop]: Abstraction has 3756 states and 5869 transitions. [2023-11-12 00:50:09,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:50:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3756 states and 5869 transitions. [2023-11-12 00:50:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:50:09,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:09,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:09,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:09,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:50:09,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:09,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2036897949, now seen corresponding path program 1 times [2023-11-12 00:50:09,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:09,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894415113] [2023-11-12 00:50:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:09,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:50:09,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894415113] [2023-11-12 00:50:09,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894415113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067108766] [2023-11-12 00:50:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:09,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:09,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:09,675 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:09,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:50:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:09,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:50:09,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:50:09,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067108766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:09,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:09,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-12 00:50:09,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934394351] [2023-11-12 00:50:09,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:09,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:09,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:50:09,842 INFO L87 Difference]: Start difference. First operand 3756 states and 5869 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 00:50:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:10,455 INFO L93 Difference]: Finished difference Result 4498 states and 6813 transitions. [2023-11-12 00:50:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 110 [2023-11-12 00:50:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:10,468 INFO L225 Difference]: With dead ends: 4498 [2023-11-12 00:50:10,468 INFO L226 Difference]: Without dead ends: 3689 [2023-11-12 00:50:10,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:50:10,473 INFO L413 NwaCegarLoop]: 3161 mSDtfsCounter, 16 mSDsluCounter, 3147 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6308 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:10,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6308 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3689 states. [2023-11-12 00:50:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3689 to 3565. [2023-11-12 00:50:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3136 states have (on average 1.637436224489796) internal successors, (5135), 3146 states have internal predecessors, (5135), 251 states have call successors, (251), 177 states have call predecessors, (251), 176 states have return successors, (249), 242 states have call predecessors, (249), 249 states have call successors, (249) [2023-11-12 00:50:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5635 transitions. [2023-11-12 00:50:10,666 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5635 transitions. Word has length 110 [2023-11-12 00:50:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:10,667 INFO L495 AbstractCegarLoop]: Abstraction has 3565 states and 5635 transitions. [2023-11-12 00:50:10,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-12 00:50:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5635 transitions. [2023-11-12 00:50:10,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 00:50:10,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:10,673 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:50:10,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:10,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 00:50:10,880 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:10,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1549584960, now seen corresponding path program 1 times [2023-11-12 00:50:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653607944] [2023-11-12 00:50:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 00:50:11,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:11,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653607944] [2023-11-12 00:50:11,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653607944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043741919] [2023-11-12 00:50:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:11,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:11,059 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:11,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:50:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:11,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:50:11,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:50:11,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:11,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043741919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:11,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:11,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-11-12 00:50:11,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846995426] [2023-11-12 00:50:11,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:11,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:11,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:11,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:11,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:11,280 INFO L87 Difference]: Start difference. First operand 3565 states and 5635 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-12 00:50:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:11,832 INFO L93 Difference]: Finished difference Result 5163 states and 7636 transitions. [2023-11-12 00:50:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 111 [2023-11-12 00:50:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:11,846 INFO L225 Difference]: With dead ends: 5163 [2023-11-12 00:50:11,847 INFO L226 Difference]: Without dead ends: 3845 [2023-11-12 00:50:11,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:11,852 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3338 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3338 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:11,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3338 Valid, 3193 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:50:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3845 states. [2023-11-12 00:50:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3845 to 3813. [2023-11-12 00:50:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3361 states have (on average 1.5986313597143706) internal successors, (5373), 3371 states have internal predecessors, (5373), 253 states have call successors, (253), 198 states have call predecessors, (253), 197 states have return successors, (269), 244 states have call predecessors, (269), 251 states have call successors, (269) [2023-11-12 00:50:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5895 transitions. [2023-11-12 00:50:12,069 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5895 transitions. Word has length 111 [2023-11-12 00:50:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:12,070 INFO L495 AbstractCegarLoop]: Abstraction has 3813 states and 5895 transitions. [2023-11-12 00:50:12,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2023-11-12 00:50:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5895 transitions. [2023-11-12 00:50:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-12 00:50:12,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:12,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:12,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 00:50:12,286 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:12,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash -832464723, now seen corresponding path program 1 times [2023-11-12 00:50:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802227607] [2023-11-12 00:50:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:50:12,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802227607] [2023-11-12 00:50:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802227607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:12,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437605165] [2023-11-12 00:50:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:12,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:12,363 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:12,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 00:50:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:12,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:50:12,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:50:12,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:12,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437605165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:12,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-12 00:50:12,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447882263] [2023-11-12 00:50:12,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:12,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:12,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:12,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:12,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:50:12,542 INFO L87 Difference]: Start difference. First operand 3813 states and 5895 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:50:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:13,205 INFO L93 Difference]: Finished difference Result 5293 states and 7769 transitions. [2023-11-12 00:50:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (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 108 [2023-11-12 00:50:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:13,216 INFO L225 Difference]: With dead ends: 5293 [2023-11-12 00:50:13,216 INFO L226 Difference]: Without dead ends: 3811 [2023-11-12 00:50:13,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:50:13,224 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 81 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 6362 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:13,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 6362 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2023-11-12 00:50:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3781. [2023-11-12 00:50:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3329 states have (on average 1.585160708921598) internal successors, (5277), 3339 states have internal predecessors, (5277), 253 states have call successors, (253), 198 states have call predecessors, (253), 197 states have return successors, (269), 244 states have call predecessors, (269), 251 states have call successors, (269) [2023-11-12 00:50:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5799 transitions. [2023-11-12 00:50:13,426 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5799 transitions. Word has length 108 [2023-11-12 00:50:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:13,426 INFO L495 AbstractCegarLoop]: Abstraction has 3781 states and 5799 transitions. [2023-11-12 00:50:13,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-12 00:50:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5799 transitions. [2023-11-12 00:50:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-12 00:50:13,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:13,433 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:13,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:13,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:50:13,639 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:13,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 117086533, now seen corresponding path program 1 times [2023-11-12 00:50:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060366863] [2023-11-12 00:50:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 00:50:14,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:14,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060366863] [2023-11-12 00:50:14,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060366863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:14,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351413574] [2023-11-12 00:50:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:14,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:14,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:14,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:14,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48cf2ae6-af62-4efe-a9e0-6ec95d709a27/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 00:50:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:14,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:50:14,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:50:14,691 INFO L327 TraceCheckSpWp]: Computing backward predicates...