./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40c1e0608e097577ee5e32b08b857d6e2e7eb2349b5c9e07b4711539a549ac1d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:22:26,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:22:26,453 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:22:26,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:22:26,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:22:26,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:22:26,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:22:26,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:22:26,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:22:26,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:22:26,486 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:22:26,486 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:22:26,487 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:22:26,487 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:22:26,488 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:22:26,488 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:22:26,489 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:22:26,489 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:22:26,490 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:22:26,490 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:22:26,490 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:22:26,491 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:22:26,492 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:22:26,492 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:22:26,493 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:22:26,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:22:26,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:22:26,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:22:26,495 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:22:26,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:22:26,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:22:26,496 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:22:26,496 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:22:26,497 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:22:26,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:22:26,497 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:22:26,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:22:26,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:26,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:22:26,498 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:22:26,498 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:22:26,499 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:22:26,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:22:26,499 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:22:26,499 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:22:26,499 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:22:26,500 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:22:26,500 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_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40c1e0608e097577ee5e32b08b857d6e2e7eb2349b5c9e07b4711539a549ac1d [2023-12-02 12:22:26,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:22:26,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:22:26,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:22:26,754 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:22:26,754 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:22:26,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c [2023-12-02 12:22:29,577 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:22:30,170 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:22:30,171 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c [2023-12-02 12:22:30,221 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/data/00bf5a5d0/0a994cd24f2a4b81bbef9710ea762d3b/FLAGf62fccedc [2023-12-02 12:22:30,233 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/data/00bf5a5d0/0a994cd24f2a4b81bbef9710ea762d3b [2023-12-02 12:22:30,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:22:30,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:22:30,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:30,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:22:30,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:22:30,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:30" (1/1) ... [2023-12-02 12:22:30,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405caa80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:30, skipping insertion in model container [2023-12-02 12:22:30,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:30" (1/1) ... [2023-12-02 12:22:30,455 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:22:32,149 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_a6585479-c942-4826-aacf-e9eea4af9f98/sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c[375709,375722] [2023-12-02 12:22:32,189 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_a6585479-c942-4826-aacf-e9eea4af9f98/sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c[383339,383352] [2023-12-02 12:22:32,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:32,453 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:22:33,453 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_a6585479-c942-4826-aacf-e9eea4af9f98/sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c[375709,375722] [2023-12-02 12:22:33,466 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_a6585479-c942-4826-aacf-e9eea4af9f98/sv-benchmarks/c/combinations/Problem05_label48+token_ring.07.cil-1.c[383339,383352] [2023-12-02 12:22:33,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:33,560 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:22:33,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33 WrapperNode [2023-12-02 12:22:33,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:33,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:33,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:22:33,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:22:33,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:33,641 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:33,979 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12928 [2023-12-02 12:22:33,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:33,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:22:33,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:22:33,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:22:33,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:33,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,406 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,428 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:22:34,481 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:22:34,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:22:34,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:22:34,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (1/1) ... [2023-12-02 12:22:34,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:34,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:22:34,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:22:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:22:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 12:22:34,562 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 12:22:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 12:22:34,562 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 12:22:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 12:22:34,563 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 12:22:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 12:22:34,563 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 12:22:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 12:22:34,563 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 12:22:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 12:22:34,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 12:22:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:22:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:22:34,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:22:34,717 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:22:34,720 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:22:42,679 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:22:44,907 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:22:44,907 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-02 12:22:44,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:44 BoogieIcfgContainer [2023-12-02 12:22:44,910 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:22:44,912 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:22:44,913 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:22:44,916 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:22:44,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:22:30" (1/3) ... [2023-12-02 12:22:44,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55499d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:44, skipping insertion in model container [2023-12-02 12:22:44,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:33" (2/3) ... [2023-12-02 12:22:44,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55499d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:44, skipping insertion in model container [2023-12-02 12:22:44,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:44" (3/3) ... [2023-12-02 12:22:44,920 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.07.cil-1.c [2023-12-02 12:22:44,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:22:44,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 12:22:45,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:22:45,024 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;@c254555, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:22:45,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 12:22:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 12:22:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 12:22:45,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:45,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:45,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:45,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 22995487, now seen corresponding path program 1 times [2023-12-02 12:22:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971791208] [2023-12-02 12:22:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:22:45,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971791208] [2023-12-02 12:22:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971791208] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:45,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:45,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:22:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066643265] [2023-12-02 12:22:45,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:22:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:22:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:22:45,529 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:22:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:46,423 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2023-12-02 12:22:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:22:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-02 12:22:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:46,453 INFO L225 Difference]: With dead ends: 3692 [2023-12-02 12:22:46,453 INFO L226 Difference]: Without dead ends: 1907 [2023-12-02 12:22:46,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:22:46,464 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:46,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 12:22:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-12-02 12:22:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2023-12-02 12:22:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-12-02 12:22:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2023-12-02 12:22:46,590 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2023-12-02 12:22:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:46,591 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2023-12-02 12:22:46,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:22:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2023-12-02 12:22:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 12:22:46,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:46,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:22:46,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:46,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2059766758, now seen corresponding path program 1 times [2023-12-02 12:22:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:46,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493554676] [2023-12-02 12:22:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:46,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:22:46,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:46,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493554676] [2023-12-02 12:22:46,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493554676] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:46,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286924063] [2023-12-02 12:22:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:46,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:46,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:46,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:22:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:47,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:22:47,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 12:22:47,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:22:47,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286924063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:47,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:22:47,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:22:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133021479] [2023-12-02 12:22:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:47,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:47,101 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:47,587 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2023-12-02 12:22:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:47,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 12:22:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:47,605 INFO L225 Difference]: With dead ends: 2419 [2023-12-02 12:22:47,606 INFO L226 Difference]: Without dead ends: 2159 [2023-12-02 12:22:47,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:47,609 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:47,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2023-12-02 12:22:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2023-12-02 12:22:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-12-02 12:22:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2023-12-02 12:22:47,686 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2023-12-02 12:22:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:47,687 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2023-12-02 12:22:47,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2023-12-02 12:22:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 12:22:47,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:47,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:47,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 12:22:47,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:47,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:47,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash 650363032, now seen corresponding path program 1 times [2023-12-02 12:22:47,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:47,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239203064] [2023-12-02 12:22:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:22:48,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239203064] [2023-12-02 12:22:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239203064] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455672015] [2023-12-02 12:22:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:48,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:48,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:48,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:48,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:22:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:48,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:22:48,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:22:48,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:22:48,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455672015] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:48,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:22:48,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:22:48,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437444573] [2023-12-02 12:22:48,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:48,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:48,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:48,376 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:48,931 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2023-12-02 12:22:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 12:22:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:48,947 INFO L225 Difference]: With dead ends: 3160 [2023-12-02 12:22:48,947 INFO L226 Difference]: Without dead ends: 2651 [2023-12-02 12:22:48,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:48,952 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:48,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:22:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-12-02 12:22:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2023-12-02 12:22:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-12-02 12:22:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2023-12-02 12:22:49,041 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2023-12-02 12:22:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:49,041 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2023-12-02 12:22:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2023-12-02 12:22:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 12:22:49,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:49,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:49,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:22:49,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:49,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:49,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -899169386, now seen corresponding path program 1 times [2023-12-02 12:22:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:49,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103796634] [2023-12-02 12:22:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:49,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:22:49,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:49,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103796634] [2023-12-02 12:22:49,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103796634] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:49,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892099715] [2023-12-02 12:22:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:49,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:49,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:49,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:49,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:22:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:49,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:22:49,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 12:22:49,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:22:49,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892099715] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:49,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:22:49,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:22:49,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181518338] [2023-12-02 12:22:49,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:49,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:49,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:49,601 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:50,115 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2023-12-02 12:22:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:50,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 12:22:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:50,142 INFO L225 Difference]: With dead ends: 4618 [2023-12-02 12:22:50,142 INFO L226 Difference]: Without dead ends: 3619 [2023-12-02 12:22:50,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:50,150 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:50,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3419 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2023-12-02 12:22:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2023-12-02 12:22:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-12-02 12:22:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2023-12-02 12:22:50,313 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2023-12-02 12:22:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:50,314 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2023-12-02 12:22:50,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2023-12-02 12:22:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 12:22:50,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:50,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:50,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:22:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:50,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:50,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash -217825704, now seen corresponding path program 1 times [2023-12-02 12:22:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:50,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551217260] [2023-12-02 12:22:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:22:50,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:50,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551217260] [2023-12-02 12:22:50,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551217260] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:50,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497119262] [2023-12-02 12:22:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:50,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:50,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:50,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:50,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:22:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:50,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:22:50,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:22:50,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:22:50,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497119262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:50,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:22:50,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:22:50,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810385234] [2023-12-02 12:22:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:50,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:50,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:50,854 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:51,395 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2023-12-02 12:22:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 12:22:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:51,420 INFO L225 Difference]: With dead ends: 7486 [2023-12-02 12:22:51,420 INFO L226 Difference]: Without dead ends: 5523 [2023-12-02 12:22:51,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:22:51,426 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:51,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-12-02 12:22:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2023-12-02 12:22:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-12-02 12:22:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2023-12-02 12:22:51,565 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2023-12-02 12:22:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:51,566 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2023-12-02 12:22:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:22:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2023-12-02 12:22:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 12:22:51,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:51,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:51,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:22:51,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:51,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:51,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash 380491734, now seen corresponding path program 1 times [2023-12-02 12:22:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:51,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106019105] [2023-12-02 12:22:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:51,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 12:22:51,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106019105] [2023-12-02 12:22:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106019105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:51,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:51,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291835229] [2023-12-02 12:22:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:51,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:51,894 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 12:22:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:52,480 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2023-12-02 12:22:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2023-12-02 12:22:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:52,524 INFO L225 Difference]: With dead ends: 8563 [2023-12-02 12:22:52,524 INFO L226 Difference]: Without dead ends: 6593 [2023-12-02 12:22:52,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:52,533 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:52,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-12-02 12:22:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2023-12-02 12:22:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-12-02 12:22:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2023-12-02 12:22:52,798 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2023-12-02 12:22:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:52,799 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2023-12-02 12:22:52,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 12:22:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2023-12-02 12:22:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 12:22:52,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:52,816 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 12:22:52,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:22:52,816 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:52,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:52,817 INFO L85 PathProgramCache]: Analyzing trace with hash 574296636, now seen corresponding path program 1 times [2023-12-02 12:22:52,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:52,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344566770] [2023-12-02 12:22:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:52,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 12:22:52,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:52,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344566770] [2023-12-02 12:22:52,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344566770] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:52,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:52,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:52,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470546863] [2023-12-02 12:22:52,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:52,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:52,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:52,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:52,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:52,928 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:22:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:53,695 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2023-12-02 12:22:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-12-02 12:22:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:53,745 INFO L225 Difference]: With dead ends: 15382 [2023-12-02 12:22:53,745 INFO L226 Difference]: Without dead ends: 10755 [2023-12-02 12:22:53,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:53,766 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:53,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2023-12-02 12:22:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2023-12-02 12:22:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-12-02 12:22:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2023-12-02 12:22:54,280 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2023-12-02 12:22:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:54,281 INFO L495 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2023-12-02 12:22:54,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:22:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2023-12-02 12:22:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 12:22:54,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:54,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 12:22:54,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:22:54,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:54,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 806005876, now seen corresponding path program 1 times [2023-12-02 12:22:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351630650] [2023-12-02 12:22:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 12:22:54,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:54,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351630650] [2023-12-02 12:22:54,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351630650] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:54,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:54,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:54,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817722724] [2023-12-02 12:22:54,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:54,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:54,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:54,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:54,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:54,453 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:22:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:55,393 INFO L93 Difference]: Finished difference Result 28534 states and 42036 transitions. [2023-12-02 12:22:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-12-02 12:22:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:55,469 INFO L225 Difference]: With dead ends: 28534 [2023-12-02 12:22:55,469 INFO L226 Difference]: Without dead ends: 19475 [2023-12-02 12:22:55,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:55,503 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3436 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:55,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2023-12-02 12:22:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 19377. [2023-12-02 12:22:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16683 states have (on average 1.4773721752682372) internal successors, (24647), 16749 states have internal predecessors, (24647), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-12-02 12:22:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 28367 transitions. [2023-12-02 12:22:56,262 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 28367 transitions. Word has length 138 [2023-12-02 12:22:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:56,262 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 28367 transitions. [2023-12-02 12:22:56,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:22:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 28367 transitions. [2023-12-02 12:22:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 12:22:56,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:56,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 12:22:56,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:22:56,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:56,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1532342951, now seen corresponding path program 1 times [2023-12-02 12:22:56,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284638225] [2023-12-02 12:22:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 12:22:56,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:56,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284638225] [2023-12-02 12:22:56,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284638225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:56,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:56,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260408148] [2023-12-02 12:22:56,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:56,420 INFO L87 Difference]: Start difference. First operand 19377 states and 28367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:22:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:57,918 INFO L93 Difference]: Finished difference Result 54262 states and 78420 transitions. [2023-12-02 12:22:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-12-02 12:22:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:58,055 INFO L225 Difference]: With dead ends: 54262 [2023-12-02 12:22:58,055 INFO L226 Difference]: Without dead ends: 36531 [2023-12-02 12:22:58,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:58,112 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3439 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:58,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36531 states. [2023-12-02 12:22:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36531 to 36337. [2023-12-02 12:22:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36337 states, 31083 states have (on average 1.439468519769649) internal successors, (44743), 31213 states have internal predecessors, (44743), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2023-12-02 12:22:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36337 states to 36337 states and 51919 transitions. [2023-12-02 12:22:59,351 INFO L78 Accepts]: Start accepts. Automaton has 36337 states and 51919 transitions. Word has length 138 [2023-12-02 12:22:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:59,351 INFO L495 AbstractCegarLoop]: Abstraction has 36337 states and 51919 transitions. [2023-12-02 12:22:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:22:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 36337 states and 51919 transitions. [2023-12-02 12:22:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 12:22:59,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:59,437 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 12:22:59,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:22:59,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:59,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:59,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1072351554, now seen corresponding path program 1 times [2023-12-02 12:22:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678293294] [2023-12-02 12:22:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:59,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 12:23:00,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678293294] [2023-12-02 12:23:00,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678293294] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699626045] [2023-12-02 12:23:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:23:00,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:23:00,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:23:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:00,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 12:23:00,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:23:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 12:23:00,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:23:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 12:23:01,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699626045] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:23:01,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094061476] [2023-12-02 12:23:01,389 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-12-02 12:23:01,390 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:23:01,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:23:01,401 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:23:01,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:23:28,615 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 1 for LOIs [2023-12-02 12:23:28,627 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 199 for LOIs [2023-12-02 12:23:28,810 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 12:23:28,811 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 12:23:28,835 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 42 for LOIs [2023-12-02 12:23:28,931 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 12:23:29,172 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:23:43,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '260995#(and (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (not (= ~token~0 (+ 7 ~local~0))) (= ~m_st~0 1) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|))' at error location [2023-12-02 12:23:43,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:23:43,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:23:43,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 12:23:43,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255648341] [2023-12-02 12:23:43,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:23:43,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:23:43,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:23:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=5556, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 12:23:43,212 INFO L87 Difference]: Start difference. First operand 36337 states and 51919 transitions. Second operand has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 12:23:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:47,579 INFO L93 Difference]: Finished difference Result 119673 states and 169811 transitions. [2023-12-02 12:23:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 12:23:47,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 158 [2023-12-02 12:23:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:47,800 INFO L225 Difference]: With dead ends: 119673 [2023-12-02 12:23:47,800 INFO L226 Difference]: Without dead ends: 84983 [2023-12-02 12:23:47,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3366 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=839, Invalid=9463, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 12:23:47,866 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 8788 mSDsluCounter, 19307 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8788 SdHoareTripleChecker+Valid, 22561 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:47,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8788 Valid, 22561 Invalid, 2723 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [670 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 12:23:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84983 states. [2023-12-02 12:23:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84983 to 77777. [2023-12-02 12:23:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77777 states, 66155 states have (on average 1.4048068929030308) internal successors, (92935), 66445 states have internal predecessors, (92935), 7876 states have call successors, (7876), 3744 states have call predecessors, (7876), 3744 states have return successors, (7876), 7588 states have call predecessors, (7876), 7876 states have call successors, (7876) [2023-12-02 12:23:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77777 states to 77777 states and 108687 transitions. [2023-12-02 12:23:50,921 INFO L78 Accepts]: Start accepts. Automaton has 77777 states and 108687 transitions. Word has length 158 [2023-12-02 12:23:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:50,921 INFO L495 AbstractCegarLoop]: Abstraction has 77777 states and 108687 transitions. [2023-12-02 12:23:50,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 12:23:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 77777 states and 108687 transitions. [2023-12-02 12:23:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 12:23:51,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:51,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:51,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:23:51,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:51,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:51,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1647970085, now seen corresponding path program 1 times [2023-12-02 12:23:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:51,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150598307] [2023-12-02 12:23:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 12:23:51,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150598307] [2023-12-02 12:23:51,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150598307] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:51,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324168392] [2023-12-02 12:23:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:51,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:51,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:23:51,409 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:23:51,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:23:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:51,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:23:51,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:23:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 12:23:51,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:23:51,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324168392] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:51,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:23:51,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 12:23:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271365144] [2023-12-02 12:23:51,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:23:51,646 INFO L87 Difference]: Start difference. First operand 77777 states and 108687 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:23:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:55,634 INFO L93 Difference]: Finished difference Result 148661 states and 208657 transitions. [2023-12-02 12:23:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:55,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 160 [2023-12-02 12:23:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:56,080 INFO L225 Difference]: With dead ends: 148661 [2023-12-02 12:23:56,081 INFO L226 Difference]: Without dead ends: 97651 [2023-12-02 12:23:56,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:23:56,182 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 126 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:56,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 6575 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:23:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97651 states. [2023-12-02 12:24:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97651 to 89393. [2023-12-02 12:24:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89393 states, 77195 states have (on average 1.4252607034134335) internal successors, (110023), 77485 states have internal predecessors, (110023), 8164 states have call successors, (8164), 4032 states have call predecessors, (8164), 4032 states have return successors, (8164), 7876 states have call predecessors, (8164), 8164 states have call successors, (8164) [2023-12-02 12:24:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89393 states to 89393 states and 126351 transitions. [2023-12-02 12:24:00,594 INFO L78 Accepts]: Start accepts. Automaton has 89393 states and 126351 transitions. Word has length 160 [2023-12-02 12:24:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:00,595 INFO L495 AbstractCegarLoop]: Abstraction has 89393 states and 126351 transitions. [2023-12-02 12:24:00,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:24:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 89393 states and 126351 transitions. [2023-12-02 12:24:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 12:24:00,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:00,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:24:00,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:24:00,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:00,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:00,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2073609253, now seen corresponding path program 2 times [2023-12-02 12:24:00,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:00,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826730563] [2023-12-02 12:24:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:00,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 12:24:01,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:01,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826730563] [2023-12-02 12:24:01,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826730563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:01,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112211118] [2023-12-02 12:24:01,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:24:01,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:01,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:01,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:01,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:24:01,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:24:01,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:24:01,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:24:01,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:24:01,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:24:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112211118] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:01,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:24:01,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:24:01,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839611536] [2023-12-02 12:24:01,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:01,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:24:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:24:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:01,655 INFO L87 Difference]: Start difference. First operand 89393 states and 126351 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:24:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:05,334 INFO L93 Difference]: Finished difference Result 152213 states and 218065 transitions. [2023-12-02 12:24:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:24:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2023-12-02 12:24:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:05,596 INFO L225 Difference]: With dead ends: 152213 [2023-12-02 12:24:05,596 INFO L226 Difference]: Without dead ends: 89587 [2023-12-02 12:24:05,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:05,691 INFO L413 NwaCegarLoop]: 3369 mSDtfsCounter, 167 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 6584 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:05,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 6584 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:24:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89587 states. [2023-12-02 12:24:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89587 to 89201. [2023-12-02 12:24:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89201 states, 77003 states have (on average 1.4138540056880902) internal successors, (108871), 77293 states have internal predecessors, (108871), 8164 states have call successors, (8164), 4032 states have call predecessors, (8164), 4032 states have return successors, (8164), 7876 states have call predecessors, (8164), 8164 states have call successors, (8164) [2023-12-02 12:24:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89201 states to 89201 states and 125199 transitions. [2023-12-02 12:24:09,094 INFO L78 Accepts]: Start accepts. Automaton has 89201 states and 125199 transitions. Word has length 160 [2023-12-02 12:24:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:09,095 INFO L495 AbstractCegarLoop]: Abstraction has 89201 states and 125199 transitions. [2023-12-02 12:24:09,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:24:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 89201 states and 125199 transitions. [2023-12-02 12:24:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 12:24:09,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:09,213 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:24:09,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:24:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:09,414 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:09,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:09,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2141467801, now seen corresponding path program 1 times [2023-12-02 12:24:09,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:09,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741426693] [2023-12-02 12:24:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 12:24:09,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741426693] [2023-12-02 12:24:09,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741426693] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:09,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233231249] [2023-12-02 12:24:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:09,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:09,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:09,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:24:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:10,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:24:10,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 12:24:10,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:24:10,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233231249] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:10,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:24:10,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:24:10,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624238777] [2023-12-02 12:24:10,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:10,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:24:10,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:10,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:24:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:10,281 INFO L87 Difference]: Start difference. First operand 89201 states and 125199 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:24:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:13,820 INFO L93 Difference]: Finished difference Result 148021 states and 210321 transitions. [2023-12-02 12:24:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:24:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 160 [2023-12-02 12:24:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:14,018 INFO L225 Difference]: With dead ends: 148021 [2023-12-02 12:24:14,018 INFO L226 Difference]: Without dead ends: 89395 [2023-12-02 12:24:14,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:14,091 INFO L413 NwaCegarLoop]: 3332 mSDtfsCounter, 161 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:14,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 6546 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:24:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89395 states. [2023-12-02 12:24:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89395 to 88817. [2023-12-02 12:24:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88817 states, 76619 states have (on average 1.4008927289575692) internal successors, (107335), 76909 states have internal predecessors, (107335), 8164 states have call successors, (8164), 4032 states have call predecessors, (8164), 4032 states have return successors, (8164), 7876 states have call predecessors, (8164), 8164 states have call successors, (8164) [2023-12-02 12:24:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88817 states to 88817 states and 123663 transitions. [2023-12-02 12:24:17,754 INFO L78 Accepts]: Start accepts. Automaton has 88817 states and 123663 transitions. Word has length 160 [2023-12-02 12:24:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:17,754 INFO L495 AbstractCegarLoop]: Abstraction has 88817 states and 123663 transitions. [2023-12-02 12:24:17,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:24:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 88817 states and 123663 transitions. [2023-12-02 12:24:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 12:24:17,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:17,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:24:17,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:24:18,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 12:24:18,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:18,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -568661989, now seen corresponding path program 1 times [2023-12-02 12:24:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:18,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621888257] [2023-12-02 12:24:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 12:24:18,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:18,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621888257] [2023-12-02 12:24:18,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621888257] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:18,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545964843] [2023-12-02 12:24:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:18,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:18,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:24:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:18,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:24:18,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 12:24:18,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:24:18,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545964843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:18,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:24:18,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:24:18,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721587317] [2023-12-02 12:24:18,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:18,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:24:18,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:24:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:18,715 INFO L87 Difference]: Start difference. First operand 88817 states and 123663 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:24:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:23,119 INFO L93 Difference]: Finished difference Result 165851 states and 228820 transitions. [2023-12-02 12:24:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:24:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2023-12-02 12:24:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:23,347 INFO L225 Difference]: With dead ends: 165851 [2023-12-02 12:24:23,348 INFO L226 Difference]: Without dead ends: 107993 [2023-12-02 12:24:23,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:23,418 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3442 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:23,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 3290 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:24:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107993 states. [2023-12-02 12:24:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107993 to 107993. [2023-12-02 12:24:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107993 states, 94083 states have (on average 1.3642315827514004) internal successors, (128351), 94373 states have internal predecessors, (128351), 8732 states have call successors, (8732), 5176 states have call predecessors, (8732), 5176 states have return successors, (8732), 8444 states have call predecessors, (8732), 8732 states have call successors, (8732) [2023-12-02 12:24:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107993 states to 107993 states and 145815 transitions. [2023-12-02 12:24:27,306 INFO L78 Accepts]: Start accepts. Automaton has 107993 states and 145815 transitions. Word has length 160 [2023-12-02 12:24:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:27,306 INFO L495 AbstractCegarLoop]: Abstraction has 107993 states and 145815 transitions. [2023-12-02 12:24:27,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:24:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 107993 states and 145815 transitions. [2023-12-02 12:24:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-12-02 12:24:27,461 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:27,462 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:24:27,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:24:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 12:24:27,663 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:27,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1316409412, now seen corresponding path program 1 times [2023-12-02 12:24:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:27,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027549995] [2023-12-02 12:24:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 12:24:27,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:27,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027549995] [2023-12-02 12:24:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027549995] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793799552] [2023-12-02 12:24:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:27,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:27,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:24:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:28,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:24:28,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:24:28,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:24:28,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793799552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:28,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:24:28,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 12:24:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519243239] [2023-12-02 12:24:28,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:28,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:24:28,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:24:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:24:28,174 INFO L87 Difference]: Start difference. First operand 107993 states and 145815 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 12:24:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:32,240 INFO L93 Difference]: Finished difference Result 154517 states and 208504 transitions. [2023-12-02 12:24:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:24:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 161 [2023-12-02 12:24:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:32,495 INFO L225 Difference]: With dead ends: 154517 [2023-12-02 12:24:32,495 INFO L226 Difference]: Without dead ends: 113497 [2023-12-02 12:24:32,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:24:32,556 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3426 mSDsluCounter, 3455 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 6751 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:32,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 6751 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:24:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113497 states. [2023-12-02 12:24:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113497 to 112879. [2023-12-02 12:24:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112879 states, 98572 states have (on average 1.358702268392647) internal successors, (133930), 99054 states have internal predecessors, (133930), 8740 states have call successors, (8740), 5181 states have call predecessors, (8740), 5565 states have return successors, (9124), 8644 states have call predecessors, (9124), 8740 states have call successors, (9124) [2023-12-02 12:24:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112879 states to 112879 states and 151794 transitions. [2023-12-02 12:24:37,360 INFO L78 Accepts]: Start accepts. Automaton has 112879 states and 151794 transitions. Word has length 161 [2023-12-02 12:24:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:37,360 INFO L495 AbstractCegarLoop]: Abstraction has 112879 states and 151794 transitions. [2023-12-02 12:24:37,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 12:24:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 112879 states and 151794 transitions. [2023-12-02 12:24:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-02 12:24:37,756 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:37,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:24:37,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:24:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 12:24:37,963 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:37,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1901983635, now seen corresponding path program 1 times [2023-12-02 12:24:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:37,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220298730] [2023-12-02 12:24:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 12:24:38,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:38,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220298730] [2023-12-02 12:24:38,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220298730] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:38,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517855431] [2023-12-02 12:24:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:38,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:38,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:38,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:38,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:24:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:38,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:24:38,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 12:24:38,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:24:38,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517855431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:38,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:24:38,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:24:38,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869271013] [2023-12-02 12:24:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:38,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:24:38,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:24:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:38,419 INFO L87 Difference]: Start difference. First operand 112879 states and 151794 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:24:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:42,462 INFO L93 Difference]: Finished difference Result 155835 states and 210653 transitions. [2023-12-02 12:24:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:24:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2023-12-02 12:24:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:42,697 INFO L225 Difference]: With dead ends: 155835 [2023-12-02 12:24:42,697 INFO L226 Difference]: Without dead ends: 107375 [2023-12-02 12:24:42,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:42,748 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 46 mSDsluCounter, 3219 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6462 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:42,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6462 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:24:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107375 states. [2023-12-02 12:24:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107375 to 100335. [2023-12-02 12:24:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100335 states, 87180 states have (on average 1.3740077999541178) internal successors, (119786), 87374 states have internal predecessors, (119786), 8356 states have call successors, (8356), 4797 states have call predecessors, (8356), 4797 states have return successors, (8356), 8164 states have call predecessors, (8356), 8356 states have call successors, (8356) [2023-12-02 12:24:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100335 states to 100335 states and 136498 transitions. [2023-12-02 12:24:47,420 INFO L78 Accepts]: Start accepts. Automaton has 100335 states and 136498 transitions. Word has length 162 [2023-12-02 12:24:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:47,420 INFO L495 AbstractCegarLoop]: Abstraction has 100335 states and 136498 transitions. [2023-12-02 12:24:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:24:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 100335 states and 136498 transitions. [2023-12-02 12:24:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-02 12:24:47,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:47,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 12:24:47,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:24:47,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 12:24:47,946 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:47,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1049207478, now seen corresponding path program 1 times [2023-12-02 12:24:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966933545] [2023-12-02 12:24:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 12:24:48,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966933545] [2023-12-02 12:24:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966933545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647938362] [2023-12-02 12:24:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:48,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:48,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:48,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:48,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:24:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:48,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:24:48,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 12:24:48,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:24:48,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647938362] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:48,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:24:48,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:24:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880747035] [2023-12-02 12:24:48,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:48,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:24:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:24:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:48,500 INFO L87 Difference]: Start difference. First operand 100335 states and 136498 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:24:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:55,342 INFO L93 Difference]: Finished difference Result 240689 states and 330571 transitions. [2023-12-02 12:24:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:24:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2023-12-02 12:24:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:55,674 INFO L225 Difference]: With dead ends: 240689 [2023-12-02 12:24:55,675 INFO L226 Difference]: Without dead ends: 142055 [2023-12-02 12:24:55,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:55,772 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 89 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6454 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:55,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6454 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:24:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142055 states. [2023-12-02 12:25:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142055 to 115731. [2023-12-02 12:25:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115731 states, 101806 states have (on average 1.3947704457497594) internal successors, (141996), 102001 states have internal predecessors, (141996), 8741 states have call successors, (8741), 5182 states have call predecessors, (8741), 5182 states have return successors, (8741), 8548 states have call predecessors, (8741), 8741 states have call successors, (8741) [2023-12-02 12:25:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115731 states to 115731 states and 159478 transitions. [2023-12-02 12:25:01,442 INFO L78 Accepts]: Start accepts. Automaton has 115731 states and 159478 transitions. Word has length 163 [2023-12-02 12:25:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:25:01,443 INFO L495 AbstractCegarLoop]: Abstraction has 115731 states and 159478 transitions. [2023-12-02 12:25:01,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:25:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 115731 states and 159478 transitions. [2023-12-02 12:25:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-12-02 12:25:01,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:25:01,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:25:01,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:25:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 12:25:01,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:25:01,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:25:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash 137764603, now seen corresponding path program 1 times [2023-12-02 12:25:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:25:01,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533495757] [2023-12-02 12:25:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:01,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:25:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 12:25:02,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:25:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533495757] [2023-12-02 12:25:02,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533495757] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:25:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517160366] [2023-12-02 12:25:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:02,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:25:02,030 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:25:02,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:25:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:02,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:25:02,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:25:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 12:25:02,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:25:02,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517160366] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:25:02,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:25:02,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 12:25:02,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508710406] [2023-12-02 12:25:02,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:25:02,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:25:02,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:25:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:25:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:25:02,402 INFO L87 Difference]: Start difference. First operand 115731 states and 159478 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:25:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:25:11,118 INFO L93 Difference]: Finished difference Result 284411 states and 390124 transitions. [2023-12-02 12:25:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:25:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 165 [2023-12-02 12:25:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:25:11,659 INFO L225 Difference]: With dead ends: 284411 [2023-12-02 12:25:11,659 INFO L226 Difference]: Without dead ends: 170381 [2023-12-02 12:25:11,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:25:11,769 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 3777 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3793 SdHoareTripleChecker+Valid, 9637 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:25:11,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3793 Valid, 9637 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 12:25:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170381 states. [2023-12-02 12:25:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170381 to 170379. [2023-12-02 12:25:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170379 states, 149654 states have (on average 1.3800633461183798) internal successors, (206532), 149945 states have internal predecessors, (206532), 12957 states have call successors, (12957), 7766 states have call predecessors, (12957), 7766 states have return successors, (12957), 12668 states have call predecessors, (12957), 12957 states have call successors, (12957) [2023-12-02 12:25:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170379 states to 170379 states and 232446 transitions. [2023-12-02 12:25:20,667 INFO L78 Accepts]: Start accepts. Automaton has 170379 states and 232446 transitions. Word has length 165 [2023-12-02 12:25:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:25:20,667 INFO L495 AbstractCegarLoop]: Abstraction has 170379 states and 232446 transitions. [2023-12-02 12:25:20,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:25:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 170379 states and 232446 transitions. [2023-12-02 12:25:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 12:25:20,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:25:20,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:25:20,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:25:21,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:21,157 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:25:21,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:25:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1196089585, now seen corresponding path program 1 times [2023-12-02 12:25:21,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:25:21,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400235099] [2023-12-02 12:25:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:21,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:25:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 12:25:21,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:25:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400235099] [2023-12-02 12:25:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400235099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:25:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219155067] [2023-12-02 12:25:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:21,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:25:21,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:25:21,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:25:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:21,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:25:21,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:25:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 12:25:21,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:25:21,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219155067] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:25:21,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:25:21,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 12:25:21,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050655353] [2023-12-02 12:25:21,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:25:21,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:25:21,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:25:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:25:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:25:21,602 INFO L87 Difference]: Start difference. First operand 170379 states and 232446 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:25:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:25:34,943 INFO L93 Difference]: Finished difference Result 419267 states and 569604 transitions. [2023-12-02 12:25:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:25:34,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 169 [2023-12-02 12:25:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:25:35,629 INFO L225 Difference]: With dead ends: 419267 [2023-12-02 12:25:35,630 INFO L226 Difference]: Without dead ends: 250589 [2023-12-02 12:25:35,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:25:35,942 INFO L413 NwaCegarLoop]: 3209 mSDtfsCounter, 3772 mSDsluCounter, 6422 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3788 SdHoareTripleChecker+Valid, 9631 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:25:35,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3788 Valid, 9631 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 12:25:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250589 states. [2023-12-02 12:25:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250589 to 250587. [2023-12-02 12:25:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250587 states, 219742 states have (on average 1.3642362406822546) internal successors, (299780), 220177 states have internal predecessors, (299780), 19205 states have call successors, (19205), 11638 states have call predecessors, (19205), 11638 states have return successors, (19205), 18772 states have call predecessors, (19205), 19205 states have call successors, (19205) [2023-12-02 12:25:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250587 states to 250587 states and 338190 transitions. [2023-12-02 12:25:49,827 INFO L78 Accepts]: Start accepts. Automaton has 250587 states and 338190 transitions. Word has length 169 [2023-12-02 12:25:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:25:49,828 INFO L495 AbstractCegarLoop]: Abstraction has 250587 states and 338190 transitions. [2023-12-02 12:25:49,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:25:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 250587 states and 338190 transitions. [2023-12-02 12:25:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 12:25:50,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:25:50,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:25:50,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 12:25:50,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:50,362 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:25:50,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:25:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash -860579845, now seen corresponding path program 1 times [2023-12-02 12:25:50,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:25:50,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108554573] [2023-12-02 12:25:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:50,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:25:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 12:25:50,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:25:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108554573] [2023-12-02 12:25:50,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108554573] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:25:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401505852] [2023-12-02 12:25:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:50,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:50,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:25:50,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:25:50,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6585479-c942-4826-aacf-e9eea4af9f98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:25:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:50,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:25:50,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:25:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 12:25:50,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:25:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401505852] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:25:50,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:25:50,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 12:25:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558288635] [2023-12-02 12:25:50,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:25:50,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:25:50,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:25:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:25:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:25:50,872 INFO L87 Difference]: Start difference. First operand 250587 states and 338190 transitions. Second operand has 6 states, 5 states have (on average 24.4) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:26:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:11,574 INFO L93 Difference]: Finished difference Result 617711 states and 830700 transitions. [2023-12-02 12:26:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:26:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.4) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 173 [2023-12-02 12:26:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:12,548 INFO L225 Difference]: With dead ends: 617711 [2023-12-02 12:26:12,548 INFO L226 Difference]: Without dead ends: 368825 [2023-12-02 12:26:12,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:26:12,978 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 7148 mSDsluCounter, 6326 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7164 SdHoareTripleChecker+Valid, 9536 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:12,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7164 Valid, 9536 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 12:26:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368825 states.