./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/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_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/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_155bd2d4-cbc7-4d4d-bde7-46683741400c/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 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:34:26,329 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:34:26,400 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:34:26,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:34:26,405 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:34:26,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:34:26,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:34:26,432 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:34:26,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:34:26,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:34:26,433 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:34:26,434 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:34:26,434 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:34:26,435 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:34:26,435 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:34:26,436 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:34:26,436 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:34:26,437 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:34:26,437 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:34:26,438 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:34:26,439 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:34:26,439 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:34:26,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:34:26,441 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:34:26,441 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:34:26,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:34:26,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:34:26,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:34:26,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:34:26,443 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:34:26,444 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:34:26,444 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:34:26,444 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:34:26,445 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:34:26,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:34:26,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:34:26,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:34:26,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:34:26,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:34:26,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:34:26,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:34:26,447 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:34:26,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:34:26,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:34:26,447 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:34:26,448 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:34:26,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:34:26,448 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_155bd2d4-cbc7-4d4d-bde7-46683741400c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 [2023-12-02 18:34:26,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:34:26,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:34:26,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:34:26,711 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:34:26,711 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:34:26,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2023-12-02 18:34:29,494 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:34:29,681 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:34:29,682 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2023-12-02 18:34:29,697 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/data/d322666b3/3e1b5751585c4ceb9ebd7ebd7278f191/FLAG4e4c97c66 [2023-12-02 18:34:29,712 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/data/d322666b3/3e1b5751585c4ceb9ebd7ebd7278f191 [2023-12-02 18:34:29,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:34:29,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:34:29,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:34:29,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:34:29,723 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:34:29,724 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:34:29" (1/1) ... [2023-12-02 18:34:29,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fe60432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:29, skipping insertion in model container [2023-12-02 18:34:29,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:34:29" (1/1) ... [2023-12-02 18:34:29,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:34:29,924 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_155bd2d4-cbc7-4d4d-bde7-46683741400c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2023-12-02 18:34:29,979 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_155bd2d4-cbc7-4d4d-bde7-46683741400c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2023-12-02 18:34:30,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:34:30,036 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:34:30,049 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_155bd2d4-cbc7-4d4d-bde7-46683741400c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2023-12-02 18:34:30,071 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_155bd2d4-cbc7-4d4d-bde7-46683741400c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2023-12-02 18:34:30,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:34:30,122 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:34:30,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30 WrapperNode [2023-12-02 18:34:30,122 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:34:30,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:34:30,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:34:30,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:34:30,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,177 INFO L138 Inliner]: procedures = 59, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 530 [2023-12-02 18:34:30,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:34:30,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:34:30,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:34:30,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:34:30,185 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,200 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,207 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:34:30,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:34:30,216 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:34:30,216 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:34:30,217 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (1/1) ... [2023-12-02 18:34:30,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:34:30,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:30,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:34:30,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:34:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:34:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 18:34:30,298 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 18:34:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 18:34:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 18:34:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 18:34:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 18:34:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 18:34:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 18:34:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 18:34:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 18:34:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 18:34:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 18:34:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 18:34:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 18:34:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 18:34:30,301 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 18:34:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 18:34:30,301 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 18:34:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 18:34:30,301 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 18:34:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 18:34:30,301 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 18:34:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:34:30,302 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 18:34:30,302 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 18:34:30,302 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 18:34:30,302 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 18:34:30,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:34:30,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:34:30,302 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 18:34:30,302 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 18:34:30,395 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:34:30,397 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:34:30,851 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:34:31,039 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:34:31,072 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-02 18:34:31,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:34:31 BoogieIcfgContainer [2023-12-02 18:34:31,074 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:34:31,077 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:34:31,077 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:34:31,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:34:31,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:34:29" (1/3) ... [2023-12-02 18:34:31,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1274d67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:34:31, skipping insertion in model container [2023-12-02 18:34:31,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:34:30" (2/3) ... [2023-12-02 18:34:31,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1274d67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:34:31, skipping insertion in model container [2023-12-02 18:34:31,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:34:31" (3/3) ... [2023-12-02 18:34:31,083 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2023-12-02 18:34:31,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:34:31,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 18:34:31,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:34:31,176 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;@10b231e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:34:31,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 18:34:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 117 states have (on average 1.4786324786324787) internal successors, (173), 123 states have internal predecessors, (173), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-02 18:34:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 18:34:31,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:31,195 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] [2023-12-02 18:34:31,196 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:34:31,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:31,202 INFO L85 PathProgramCache]: Analyzing trace with hash 355836622, now seen corresponding path program 1 times [2023-12-02 18:34:31,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296236648] [2023-12-02 18:34:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:31,563 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 18:34:31,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296236648] [2023-12-02 18:34:31,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296236648] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:31,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:31,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:34:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675705546] [2023-12-02 18:34:31,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:31,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:34:31,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:31,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:34:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:34:31,604 INFO L87 Difference]: Start difference. First operand has 165 states, 117 states have (on average 1.4786324786324787) internal successors, (173), 123 states have internal predecessors, (173), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 18:34:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:32,408 INFO L93 Difference]: Finished difference Result 647 states and 962 transitions. [2023-12-02 18:34:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:34:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 40 [2023-12-02 18:34:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:32,426 INFO L225 Difference]: With dead ends: 647 [2023-12-02 18:34:32,426 INFO L226 Difference]: Without dead ends: 477 [2023-12-02 18:34:32,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:34:32,436 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 650 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:32,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 617 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:34:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-12-02 18:34:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 466. [2023-12-02 18:34:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 347 states have (on average 1.3861671469740633) internal successors, (481), 354 states have internal predecessors, (481), 80 states have call successors, (80), 38 states have call predecessors, (80), 37 states have return successors, (104), 75 states have call predecessors, (104), 78 states have call successors, (104) [2023-12-02 18:34:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 665 transitions. [2023-12-02 18:34:32,543 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 665 transitions. Word has length 40 [2023-12-02 18:34:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:32,543 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 665 transitions. [2023-12-02 18:34:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 18:34:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 665 transitions. [2023-12-02 18:34:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 18:34:32,547 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:32,547 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] [2023-12-02 18:34:32,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:34:32,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:34:32,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1233812994, now seen corresponding path program 1 times [2023-12-02 18:34:32,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:32,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865698360] [2023-12-02 18:34:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:32,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:32,644 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 18:34:32,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:32,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865698360] [2023-12-02 18:34:32,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865698360] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:32,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:32,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:34:32,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995372474] [2023-12-02 18:34:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:34:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:32,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:34:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:34:32,649 INFO L87 Difference]: Start difference. First operand 466 states and 665 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 18:34:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:32,916 INFO L93 Difference]: Finished difference Result 590 states and 827 transitions. [2023-12-02 18:34:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:34:32,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 18:34:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:32,923 INFO L225 Difference]: With dead ends: 590 [2023-12-02 18:34:32,923 INFO L226 Difference]: Without dead ends: 526 [2023-12-02 18:34:32,924 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 18:34:32,926 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 275 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:32,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 398 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:34:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-12-02 18:34:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 519. [2023-12-02 18:34:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 385 states have (on average 1.3714285714285714) internal successors, (528), 392 states have internal predecessors, (528), 88 states have call successors, (88), 45 states have call predecessors, (88), 44 states have return successors, (112), 83 states have call predecessors, (112), 86 states have call successors, (112) [2023-12-02 18:34:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 728 transitions. [2023-12-02 18:34:32,980 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 728 transitions. Word has length 45 [2023-12-02 18:34:32,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:32,980 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 728 transitions. [2023-12-02 18:34:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 18:34:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 728 transitions. [2023-12-02 18:34:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 18:34:33,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:33,011 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] [2023-12-02 18:34:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:34:33,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:34:33,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash -314838371, now seen corresponding path program 1 times [2023-12-02 18:34:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513800732] [2023-12-02 18:34:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:33,240 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 18:34:33,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:33,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513800732] [2023-12-02 18:34:33,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513800732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:33,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:33,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:34:33,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721122888] [2023-12-02 18:34:33,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:33,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:34:33,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:33,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:34:33,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:34:33,244 INFO L87 Difference]: Start difference. First operand 519 states and 728 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:34:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:33,882 INFO L93 Difference]: Finished difference Result 700 states and 949 transitions. [2023-12-02 18:34:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:34:33,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-12-02 18:34:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:33,888 INFO L225 Difference]: With dead ends: 700 [2023-12-02 18:34:33,888 INFO L226 Difference]: Without dead ends: 584 [2023-12-02 18:34:33,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:34:33,890 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 338 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:33,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 576 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:34:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-12-02 18:34:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 571. [2023-12-02 18:34:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 422 states have (on average 1.3625592417061612) internal successors, (575), 429 states have internal predecessors, (575), 96 states have call successors, (96), 52 states have call predecessors, (96), 51 states have return successors, (120), 91 states have call predecessors, (120), 94 states have call successors, (120) [2023-12-02 18:34:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 791 transitions. [2023-12-02 18:34:33,956 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 791 transitions. Word has length 45 [2023-12-02 18:34:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:33,957 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 791 transitions. [2023-12-02 18:34:33,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:34:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 791 transitions. [2023-12-02 18:34:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 18:34:33,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:33,959 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] [2023-12-02 18:34:33,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:34:33,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:34:33,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1318058654, now seen corresponding path program 1 times [2023-12-02 18:34:33,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:33,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915832072] [2023-12-02 18:34:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:34,008 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 18:34:34,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915832072] [2023-12-02 18:34:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915832072] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:34,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:34,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:34:34,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609490814] [2023-12-02 18:34:34,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:34,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:34:34,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:34:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:34:34,011 INFO L87 Difference]: Start difference. First operand 571 states and 791 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:34:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:34,147 INFO L93 Difference]: Finished difference Result 899 states and 1197 transitions. [2023-12-02 18:34:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:34:34,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-12-02 18:34:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:34,153 INFO L225 Difference]: With dead ends: 899 [2023-12-02 18:34:34,153 INFO L226 Difference]: Without dead ends: 730 [2023-12-02 18:34:34,154 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 18:34:34,156 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 194 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:34,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 244 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-12-02 18:34:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 711. [2023-12-02 18:34:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 517 states have (on average 1.3249516441005802) internal successors, (685), 524 states have internal predecessors, (685), 120 states have call successors, (120), 73 states have call predecessors, (120), 72 states have return successors, (144), 115 states have call predecessors, (144), 118 states have call successors, (144) [2023-12-02 18:34:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 949 transitions. [2023-12-02 18:34:34,230 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 949 transitions. Word has length 46 [2023-12-02 18:34:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:34,231 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 949 transitions. [2023-12-02 18:34:34,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:34:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 949 transitions. [2023-12-02 18:34:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 18:34:34,233 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:34,233 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] [2023-12-02 18:34:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:34:34,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:34:34,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash 315257465, now seen corresponding path program 1 times [2023-12-02 18:34:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715216438] [2023-12-02 18:34:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:34,274 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 18:34:34,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:34,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715216438] [2023-12-02 18:34:34,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715216438] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:34,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:34,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:34:34,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594565585] [2023-12-02 18:34:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:34,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:34:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:34:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:34:34,277 INFO L87 Difference]: Start difference. First operand 711 states and 949 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:34:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:34,431 INFO L93 Difference]: Finished difference Result 1081 states and 1394 transitions. [2023-12-02 18:34:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:34:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-12-02 18:34:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:34,438 INFO L225 Difference]: With dead ends: 1081 [2023-12-02 18:34:34,438 INFO L226 Difference]: Without dead ends: 818 [2023-12-02 18:34:34,439 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 18:34:34,440 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 67 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:34,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 349 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2023-12-02 18:34:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 812. [2023-12-02 18:34:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 588 states have (on average 1.314625850340136) internal successors, (773), 595 states have internal predecessors, (773), 136 states have call successors, (136), 87 states have call predecessors, (136), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2023-12-02 18:34:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1069 transitions. [2023-12-02 18:34:34,491 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1069 transitions. Word has length 47 [2023-12-02 18:34:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:34,492 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1069 transitions. [2023-12-02 18:34:34,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:34:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1069 transitions. [2023-12-02 18:34:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 18:34:34,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:34,494 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:34:34,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:34:34,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:34:34,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2084524040, now seen corresponding path program 1 times [2023-12-02 18:34:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:34,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666870520] [2023-12-02 18:34:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:34,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:34:34,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:34,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666870520] [2023-12-02 18:34:34,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666870520] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:34,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:34,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:34:34,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871379532] [2023-12-02 18:34:34,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:34,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:34:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:34:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:34:34,566 INFO L87 Difference]: Start difference. First operand 812 states and 1069 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:34:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:34,840 INFO L93 Difference]: Finished difference Result 919 states and 1195 transitions. [2023-12-02 18:34:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:34:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-12-02 18:34:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:34,847 INFO L225 Difference]: With dead ends: 919 [2023-12-02 18:34:34,847 INFO L226 Difference]: Without dead ends: 916 [2023-12-02 18:34:34,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:34:34,849 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 352 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:34,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 227 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:34:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2023-12-02 18:34:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 811. [2023-12-02 18:34:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 588 states have (on average 1.3095238095238095) internal successors, (770), 594 states have internal predecessors, (770), 135 states have call successors, (135), 87 states have call predecessors, (135), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2023-12-02 18:34:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1065 transitions. [2023-12-02 18:34:34,927 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1065 transitions. Word has length 54 [2023-12-02 18:34:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:34,927 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1065 transitions. [2023-12-02 18:34:34,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 18:34:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1065 transitions. [2023-12-02 18:34:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:34:34,929 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:34,930 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:34:34,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:34:34,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:34:34,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash -196513054, now seen corresponding path program 1 times [2023-12-02 18:34:34,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:34,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370595575] [2023-12-02 18:34:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:34,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:34:35,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370595575] [2023-12-02 18:34:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370595575] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220318517] [2023-12-02 18:34:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:35,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:35,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:35,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:34:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:35,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:34:35,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:34:35,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:34:35,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220318517] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:35,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211105962] [2023-12-02 18:34:35,561 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 18:34:35,561 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:35,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:35,568 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:35,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:38,437 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 121 for LOIs [2023-12-02 18:34:38,480 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 117 for LOIs [2023-12-02 18:34:38,521 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 125 for LOIs [2023-12-02 18:34:39,109 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 121 for LOIs [2023-12-02 18:34:39,230 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 121 for LOIs [2023-12-02 18:34:39,372 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 121 for LOIs [2023-12-02 18:34:39,412 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 128 for LOIs [2023-12-02 18:34:39,462 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [211105962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:48,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:48,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-12-02 18:34:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412668774] [2023-12-02 18:34:48,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:48,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 18:34:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 18:34:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 18:34:48,708 INFO L87 Difference]: Start difference. First operand 811 states and 1065 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:35:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:04,057 INFO L93 Difference]: Finished difference Result 1268 states and 1598 transitions. [2023-12-02 18:35:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 18:35:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-12-02 18:35:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:04,064 INFO L225 Difference]: With dead ends: 1268 [2023-12-02 18:35:04,064 INFO L226 Difference]: Without dead ends: 860 [2023-12-02 18:35:04,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 18:35:04,068 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 162 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 3625 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 3774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:04,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1793 Invalid, 3774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3625 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-12-02 18:35:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-12-02 18:35:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 845. [2023-12-02 18:35:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 614 states have (on average 1.299674267100977) internal successors, (798), 620 states have internal predecessors, (798), 137 states have call successors, (137), 93 states have call predecessors, (137), 92 states have return successors, (162), 133 states have call predecessors, (162), 136 states have call successors, (162) [2023-12-02 18:35:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1097 transitions. [2023-12-02 18:35:04,143 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1097 transitions. Word has length 55 [2023-12-02 18:35:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:04,144 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 1097 transitions. [2023-12-02 18:35:04,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:35:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1097 transitions. [2023-12-02 18:35:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 18:35:04,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:04,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:04,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:35:04,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:04,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:04,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:04,347 INFO L85 PathProgramCache]: Analyzing trace with hash 735564824, now seen corresponding path program 1 times [2023-12-02 18:35:04,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:04,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207989757] [2023-12-02 18:35:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:04,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:04,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:04,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207989757] [2023-12-02 18:35:04,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207989757] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:04,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:35:04,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:35:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961282746] [2023-12-02 18:35:04,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:04,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:35:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:35:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:35:04,405 INFO L87 Difference]: Start difference. First operand 845 states and 1097 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:35:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:04,578 INFO L93 Difference]: Finished difference Result 1292 states and 1633 transitions. [2023-12-02 18:35:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:35:04,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-12-02 18:35:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:04,585 INFO L225 Difference]: With dead ends: 1292 [2023-12-02 18:35:04,585 INFO L226 Difference]: Without dead ends: 1026 [2023-12-02 18:35:04,586 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 18:35:04,587 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 43 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:04,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 400 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2023-12-02 18:35:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 897. [2023-12-02 18:35:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 656 states have (on average 1.2972560975609757) internal successors, (851), 662 states have internal predecessors, (851), 142 states have call successors, (142), 98 states have call predecessors, (142), 97 states have return successors, (167), 138 states have call predecessors, (167), 141 states have call successors, (167) [2023-12-02 18:35:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1160 transitions. [2023-12-02 18:35:04,703 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1160 transitions. Word has length 61 [2023-12-02 18:35:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:04,704 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1160 transitions. [2023-12-02 18:35:04,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:35:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1160 transitions. [2023-12-02 18:35:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 18:35:04,706 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:04,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:04,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:35:04,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:04,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1094497684, now seen corresponding path program 1 times [2023-12-02 18:35:04,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:04,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27728992] [2023-12-02 18:35:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:35:04,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:04,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27728992] [2023-12-02 18:35:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27728992] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:04,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:35:04,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:35:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582701692] [2023-12-02 18:35:04,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:04,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:35:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:35:04,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:35:04,858 INFO L87 Difference]: Start difference. First operand 897 states and 1160 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:35:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:05,439 INFO L93 Difference]: Finished difference Result 1571 states and 1947 transitions. [2023-12-02 18:35:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:35:05,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2023-12-02 18:35:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:05,445 INFO L225 Difference]: With dead ends: 1571 [2023-12-02 18:35:05,445 INFO L226 Difference]: Without dead ends: 1158 [2023-12-02 18:35:05,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:35:05,447 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 321 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:05,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 621 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:35:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2023-12-02 18:35:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1123. [2023-12-02 18:35:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 807 states have (on average 1.2688971499380421) internal successors, (1024), 813 states have internal predecessors, (1024), 182 states have call successors, (182), 133 states have call predecessors, (182), 132 states have return successors, (207), 178 states have call predecessors, (207), 181 states have call successors, (207) [2023-12-02 18:35:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1413 transitions. [2023-12-02 18:35:05,547 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1413 transitions. Word has length 63 [2023-12-02 18:35:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:05,547 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1413 transitions. [2023-12-02 18:35:05,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:35:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1413 transitions. [2023-12-02 18:35:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 18:35:05,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:05,550 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:35:05,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 18:35:05,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:05,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash 544790386, now seen corresponding path program 1 times [2023-12-02 18:35:05,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:05,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643749000] [2023-12-02 18:35:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:35:05,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:05,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643749000] [2023-12-02 18:35:05,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643749000] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999961636] [2023-12-02 18:35:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:05,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:05,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:35:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:05,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:35:05,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:05,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:35:05,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999961636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:05,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927568462] [2023-12-02 18:35:05,999 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 18:35:05,999 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:05,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:06,000 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:06,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:11,112 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 121 for LOIs [2023-12-02 18:35:11,148 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 120 for LOIs [2023-12-02 18:35:11,300 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 88 for LOIs [2023-12-02 18:35:11,417 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 125 for LOIs [2023-12-02 18:35:11,887 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 121 for LOIs [2023-12-02 18:35:11,988 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 121 for LOIs [2023-12-02 18:35:12,089 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 121 for LOIs [2023-12-02 18:35:12,127 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 128 for LOIs [2023-12-02 18:35:12,185 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:22,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21980#(and (= ~q_req_up~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_5| 2147483647))) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((|v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| Int) (v_~c_last_read~0_10 Int) (v_~q_free~0_42 Int) (|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| Int)) (and (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1|) (= |v_ULTIMATE.start_start_simulation1_~kernel_st~0#1_BEFORE_CALL_30| 1) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (= ~E_2~0 2) (not (= v_~q_free~0_42 1)) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 0)) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_1| 1) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (= ~t1_i~0 0))) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2023-12-02 18:35:22,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:22,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:22,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 18:35:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879081194] [2023-12-02 18:35:22,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:35:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:35:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 18:35:22,988 INFO L87 Difference]: Start difference. First operand 1123 states and 1413 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 18:35:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:23,536 INFO L93 Difference]: Finished difference Result 2629 states and 3176 transitions. [2023-12-02 18:35:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:35:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2023-12-02 18:35:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:23,554 INFO L225 Difference]: With dead ends: 2629 [2023-12-02 18:35:23,554 INFO L226 Difference]: Without dead ends: 2626 [2023-12-02 18:35:23,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 18:35:23,557 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 581 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:23,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 676 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:35:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2023-12-02 18:35:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1846. [2023-12-02 18:35:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1308 states have (on average 1.2507645259938838) internal successors, (1636), 1314 states have internal predecessors, (1636), 300 states have call successors, (300), 237 states have call predecessors, (300), 236 states have return successors, (325), 296 states have call predecessors, (325), 299 states have call successors, (325) [2023-12-02 18:35:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2261 transitions. [2023-12-02 18:35:23,839 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2261 transitions. Word has length 64 [2023-12-02 18:35:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:23,840 INFO L495 AbstractCegarLoop]: Abstraction has 1846 states and 2261 transitions. [2023-12-02 18:35:23,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-02 18:35:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2261 transitions. [2023-12-02 18:35:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 18:35:23,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:23,843 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:35:23,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:35:24,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 18:35:24,044 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:24,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash -590156260, now seen corresponding path program 2 times [2023-12-02 18:35:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:24,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369498717] [2023-12-02 18:35:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:35:24,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:24,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369498717] [2023-12-02 18:35:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369498717] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:24,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:35:24,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:35:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531016889] [2023-12-02 18:35:24,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:24,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:35:24,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:24,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:35:24,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:35:24,084 INFO L87 Difference]: Start difference. First operand 1846 states and 2261 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:35:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:24,358 INFO L93 Difference]: Finished difference Result 2602 states and 3147 transitions. [2023-12-02 18:35:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:35:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2023-12-02 18:35:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:24,367 INFO L225 Difference]: With dead ends: 2602 [2023-12-02 18:35:24,367 INFO L226 Difference]: Without dead ends: 1436 [2023-12-02 18:35:24,370 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 18:35:24,371 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 192 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:24,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 293 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2023-12-02 18:35:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1429. [2023-12-02 18:35:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1019 states have (on average 1.2443572129538762) internal successors, (1268), 1025 states have internal predecessors, (1268), 232 states have call successors, (232), 177 states have call predecessors, (232), 176 states have return successors, (257), 228 states have call predecessors, (257), 231 states have call successors, (257) [2023-12-02 18:35:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1757 transitions. [2023-12-02 18:35:24,575 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1757 transitions. Word has length 67 [2023-12-02 18:35:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:24,575 INFO L495 AbstractCegarLoop]: Abstraction has 1429 states and 1757 transitions. [2023-12-02 18:35:24,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:35:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1757 transitions. [2023-12-02 18:35:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 18:35:24,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:24,578 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:24,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 18:35:24,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:24,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1409902256, now seen corresponding path program 1 times [2023-12-02 18:35:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:24,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802484023] [2023-12-02 18:35:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:35:24,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:24,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802484023] [2023-12-02 18:35:24,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802484023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:24,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:35:24,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:35:24,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964140662] [2023-12-02 18:35:24,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:24,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:35:24,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:35:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:35:24,630 INFO L87 Difference]: Start difference. First operand 1429 states and 1757 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:35:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:24,927 INFO L93 Difference]: Finished difference Result 2401 states and 2885 transitions. [2023-12-02 18:35:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:35:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-12-02 18:35:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:24,938 INFO L225 Difference]: With dead ends: 2401 [2023-12-02 18:35:24,938 INFO L226 Difference]: Without dead ends: 1605 [2023-12-02 18:35:24,941 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 18:35:24,941 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 38 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:24,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 391 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2023-12-02 18:35:25,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1476. [2023-12-02 18:35:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1058 states have (on average 1.2457466918714555) internal successors, (1318), 1064 states have internal predecessors, (1318), 236 states have call successors, (236), 181 states have call predecessors, (236), 180 states have return successors, (261), 232 states have call predecessors, (261), 235 states have call successors, (261) [2023-12-02 18:35:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1815 transitions. [2023-12-02 18:35:25,167 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1815 transitions. Word has length 71 [2023-12-02 18:35:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:25,167 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 1815 transitions. [2023-12-02 18:35:25,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:35:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1815 transitions. [2023-12-02 18:35:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 18:35:25,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:25,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:25,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 18:35:25,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:25,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:25,169 INFO L85 PathProgramCache]: Analyzing trace with hash 924310535, now seen corresponding path program 1 times [2023-12-02 18:35:25,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:25,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564022028] [2023-12-02 18:35:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:25,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:35:25,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564022028] [2023-12-02 18:35:25,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564022028] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:25,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093605634] [2023-12-02 18:35:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:25,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:25,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:25,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:25,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:35:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:25,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:35:25,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:35:25,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:35:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093605634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:25,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:35:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:35:25,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369406782] [2023-12-02 18:35:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:35:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:35:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:35:25,407 INFO L87 Difference]: Start difference. First operand 1476 states and 1815 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 18:35:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:25,656 INFO L93 Difference]: Finished difference Result 2244 states and 2966 transitions. [2023-12-02 18:35:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:35:25,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 74 [2023-12-02 18:35:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:25,666 INFO L225 Difference]: With dead ends: 2244 [2023-12-02 18:35:25,666 INFO L226 Difference]: Without dead ends: 1852 [2023-12-02 18:35:25,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 18:35:25,668 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 188 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:25,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 273 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2023-12-02 18:35:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1845. [2023-12-02 18:35:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1340 states have (on average 1.269402985074627) internal successors, (1701), 1349 states have internal predecessors, (1701), 293 states have call successors, (293), 211 states have call predecessors, (293), 210 states have return successors, (340), 286 states have call predecessors, (340), 292 states have call successors, (340) [2023-12-02 18:35:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2334 transitions. [2023-12-02 18:35:25,832 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2334 transitions. Word has length 74 [2023-12-02 18:35:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:25,832 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2334 transitions. [2023-12-02 18:35:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 18:35:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2334 transitions. [2023-12-02 18:35:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 18:35:25,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:25,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:25,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:35:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 18:35:26,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -563283195, now seen corresponding path program 1 times [2023-12-02 18:35:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:26,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068113490] [2023-12-02 18:35:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:35:26,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068113490] [2023-12-02 18:35:26,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068113490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:26,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:35:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:35:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564304091] [2023-12-02 18:35:26,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:35:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:26,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:35:26,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:35:26,326 INFO L87 Difference]: Start difference. First operand 1845 states and 2334 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:35:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:26,984 INFO L93 Difference]: Finished difference Result 3087 states and 4135 transitions. [2023-12-02 18:35:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:35:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2023-12-02 18:35:26,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:27,002 INFO L225 Difference]: With dead ends: 3087 [2023-12-02 18:35:27,002 INFO L226 Difference]: Without dead ends: 2327 [2023-12-02 18:35:27,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:35:27,007 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 366 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:27,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 555 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:35:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2023-12-02 18:35:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2275. [2023-12-02 18:35:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 1665 states have (on average 1.281081081081081) internal successors, (2133), 1678 states have internal predecessors, (2133), 362 states have call successors, (362), 247 states have call predecessors, (362), 246 states have return successors, (442), 351 states have call predecessors, (442), 361 states have call successors, (442) [2023-12-02 18:35:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2937 transitions. [2023-12-02 18:35:27,323 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 2937 transitions. Word has length 74 [2023-12-02 18:35:27,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:27,323 INFO L495 AbstractCegarLoop]: Abstraction has 2275 states and 2937 transitions. [2023-12-02 18:35:27,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:35:27,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 2937 transitions. [2023-12-02 18:35:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:35:27,327 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:27,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:27,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 18:35:27,327 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:27,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1831737600, now seen corresponding path program 1 times [2023-12-02 18:35:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:27,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591730886] [2023-12-02 18:35:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:27,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:35:27,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:27,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591730886] [2023-12-02 18:35:27,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591730886] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:27,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:35:27,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:35:27,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916210612] [2023-12-02 18:35:27,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:35:27,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:35:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:35:27,395 INFO L87 Difference]: Start difference. First operand 2275 states and 2937 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 18:35:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:27,742 INFO L93 Difference]: Finished difference Result 3583 states and 4844 transitions. [2023-12-02 18:35:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:35:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 76 [2023-12-02 18:35:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:27,760 INFO L225 Difference]: With dead ends: 3583 [2023-12-02 18:35:27,760 INFO L226 Difference]: Without dead ends: 2543 [2023-12-02 18:35:27,765 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 18:35:27,766 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 48 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:27,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 413 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2023-12-02 18:35:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2418. [2023-12-02 18:35:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 1796 states have (on average 1.296770601336303) internal successors, (2329), 1809 states have internal predecessors, (2329), 368 states have call successors, (368), 253 states have call predecessors, (368), 252 states have return successors, (448), 357 states have call predecessors, (448), 367 states have call successors, (448) [2023-12-02 18:35:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3145 transitions. [2023-12-02 18:35:28,018 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3145 transitions. Word has length 76 [2023-12-02 18:35:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:28,019 INFO L495 AbstractCegarLoop]: Abstraction has 2418 states and 3145 transitions. [2023-12-02 18:35:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 18:35:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3145 transitions. [2023-12-02 18:35:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 18:35:28,023 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:28,023 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 18:35:28,024 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:28,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1562984370, now seen corresponding path program 1 times [2023-12-02 18:35:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833347722] [2023-12-02 18:35:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 18:35:28,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:28,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833347722] [2023-12-02 18:35:28,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833347722] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:28,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070495596] [2023-12-02 18:35:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:28,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:28,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:28,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:28,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:35:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:28,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:35:28,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:28,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:35:28,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070495596] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:28,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:35:28,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2023-12-02 18:35:28,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361694630] [2023-12-02 18:35:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:28,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:35:28,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:35:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:35:28,471 INFO L87 Difference]: Start difference. First operand 2418 states and 3145 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:35:28,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:28,780 INFO L93 Difference]: Finished difference Result 3243 states and 4133 transitions. [2023-12-02 18:35:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:35:28,781 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 18:35:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:28,793 INFO L225 Difference]: With dead ends: 3243 [2023-12-02 18:35:28,793 INFO L226 Difference]: Without dead ends: 2447 [2023-12-02 18:35:28,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:35:28,796 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 46 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:28,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 402 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2023-12-02 18:35:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2414. [2023-12-02 18:35:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 1792 states have (on average 1.2795758928571428) internal successors, (2293), 1805 states have internal predecessors, (2293), 368 states have call successors, (368), 253 states have call predecessors, (368), 252 states have return successors, (448), 357 states have call predecessors, (448), 367 states have call successors, (448) [2023-12-02 18:35:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3109 transitions. [2023-12-02 18:35:29,006 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3109 transitions. Word has length 102 [2023-12-02 18:35:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:29,007 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 3109 transitions. [2023-12-02 18:35:29,007 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:35:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3109 transitions. [2023-12-02 18:35:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 18:35:29,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:29,013 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:29,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 18:35:29,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 18:35:29,217 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:29,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash 13573389, now seen corresponding path program 1 times [2023-12-02 18:35:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:29,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879343319] [2023-12-02 18:35:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 18:35:29,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:29,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879343319] [2023-12-02 18:35:29,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879343319] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:29,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501694512] [2023-12-02 18:35:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:29,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:29,546 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:29,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:35:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:29,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:35:29,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:29,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:35:29,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501694512] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:29,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:35:29,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2023-12-02 18:35:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034664246] [2023-12-02 18:35:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:29,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:35:29,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:35:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:35:29,721 INFO L87 Difference]: Start difference. First operand 2414 states and 3109 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:35:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:30,168 INFO L93 Difference]: Finished difference Result 3276 states and 4113 transitions. [2023-12-02 18:35:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:35:30,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2023-12-02 18:35:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:30,183 INFO L225 Difference]: With dead ends: 3276 [2023-12-02 18:35:30,183 INFO L226 Difference]: Without dead ends: 2229 [2023-12-02 18:35:30,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-12-02 18:35:30,187 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 185 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:30,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 910 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2023-12-02 18:35:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2044. [2023-12-02 18:35:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1554 states have (on average 1.3011583011583012) internal successors, (2022), 1567 states have internal predecessors, (2022), 297 states have call successors, (297), 192 states have call predecessors, (297), 191 states have return successors, (377), 286 states have call predecessors, (377), 296 states have call successors, (377) [2023-12-02 18:35:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2696 transitions. [2023-12-02 18:35:30,383 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2696 transitions. Word has length 102 [2023-12-02 18:35:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:30,383 INFO L495 AbstractCegarLoop]: Abstraction has 2044 states and 2696 transitions. [2023-12-02 18:35:30,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:35:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2696 transitions. [2023-12-02 18:35:30,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 18:35:30,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:30,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:30,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:35:30,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 18:35:30,591 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:30,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1529433121, now seen corresponding path program 1 times [2023-12-02 18:35:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:30,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157666939] [2023-12-02 18:35:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 18:35:30,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:30,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157666939] [2023-12-02 18:35:30,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157666939] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:30,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:35:30,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:35:30,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289559314] [2023-12-02 18:35:30,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:30,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:35:30,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:35:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:35:30,648 INFO L87 Difference]: Start difference. First operand 2044 states and 2696 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (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 18:35:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:31,021 INFO L93 Difference]: Finished difference Result 4641 states and 6492 transitions. [2023-12-02 18:35:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:35:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (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 100 [2023-12-02 18:35:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:31,043 INFO L225 Difference]: With dead ends: 4641 [2023-12-02 18:35:31,043 INFO L226 Difference]: Without dead ends: 3307 [2023-12-02 18:35:31,050 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 18:35:31,050 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 180 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:31,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 274 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2023-12-02 18:35:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3283. [2023-12-02 18:35:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3283 states, 2513 states have (on average 1.310783923597294) internal successors, (3294), 2536 states have internal predecessors, (3294), 475 states have call successors, (475), 294 states have call predecessors, (475), 293 states have return successors, (622), 454 states have call predecessors, (622), 474 states have call successors, (622) [2023-12-02 18:35:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 4391 transitions. [2023-12-02 18:35:31,400 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 4391 transitions. Word has length 100 [2023-12-02 18:35:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:31,400 INFO L495 AbstractCegarLoop]: Abstraction has 3283 states and 4391 transitions. [2023-12-02 18:35:31,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (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 18:35:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 4391 transitions. [2023-12-02 18:35:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:35:31,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:31,410 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:31,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 18:35:31,410 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:31,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1017032389, now seen corresponding path program 1 times [2023-12-02 18:35:31,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:31,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458297291] [2023-12-02 18:35:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:35:31,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458297291] [2023-12-02 18:35:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458297291] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985351634] [2023-12-02 18:35:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:31,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:31,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:31,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:31,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:35:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:31,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:35:31,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:35:31,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:35:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985351634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:35:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 18:35:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846119404] [2023-12-02 18:35:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:31,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:35:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:31,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:35:31,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:35:31,745 INFO L87 Difference]: Start difference. First operand 3283 states and 4391 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:35:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:32,200 INFO L93 Difference]: Finished difference Result 3832 states and 5016 transitions. [2023-12-02 18:35:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:35:32,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2023-12-02 18:35:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:32,213 INFO L225 Difference]: With dead ends: 3832 [2023-12-02 18:35:32,213 INFO L226 Difference]: Without dead ends: 3239 [2023-12-02 18:35:32,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:35:32,215 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 62 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:32,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1030 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:35:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2023-12-02 18:35:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3147. [2023-12-02 18:35:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 2413 states have (on average 1.3166183174471613) internal successors, (3177), 2436 states have internal predecessors, (3177), 456 states have call successors, (456), 277 states have call predecessors, (456), 276 states have return successors, (603), 435 states have call predecessors, (603), 455 states have call successors, (603) [2023-12-02 18:35:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 4236 transitions. [2023-12-02 18:35:32,479 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 4236 transitions. Word has length 112 [2023-12-02 18:35:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:32,479 INFO L495 AbstractCegarLoop]: Abstraction has 3147 states and 4236 transitions. [2023-12-02 18:35:32,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:35:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 4236 transitions. [2023-12-02 18:35:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 18:35:32,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:32,485 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:35:32,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:35:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:32,686 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:32,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:32,686 INFO L85 PathProgramCache]: Analyzing trace with hash 88616740, now seen corresponding path program 1 times [2023-12-02 18:35:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722087022] [2023-12-02 18:35:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 18:35:32,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:32,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722087022] [2023-12-02 18:35:32,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722087022] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:32,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632461801] [2023-12-02 18:35:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:32,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:32,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:32,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:35:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:32,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:35:32,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:35:32,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:35:32,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632461801] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:35:32,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:35:32,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2023-12-02 18:35:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823233678] [2023-12-02 18:35:32,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:35:32,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:35:32,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:35:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:35:32,998 INFO L87 Difference]: Start difference. First operand 3147 states and 4236 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:35:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:33,417 INFO L93 Difference]: Finished difference Result 3896 states and 5081 transitions. [2023-12-02 18:35:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:35:33,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2023-12-02 18:35:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:33,430 INFO L225 Difference]: With dead ends: 3896 [2023-12-02 18:35:33,431 INFO L226 Difference]: Without dead ends: 3439 [2023-12-02 18:35:33,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:35:33,433 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 171 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:33,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 924 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:35:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2023-12-02 18:35:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 3405. [2023-12-02 18:35:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3405 states, 2575 states have (on average 1.3036893203883495) internal successors, (3357), 2604 states have internal predecessors, (3357), 504 states have call successors, (504), 319 states have call predecessors, (504), 324 states have return successors, (663), 483 states have call predecessors, (663), 503 states have call successors, (663) [2023-12-02 18:35:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 4524 transitions. [2023-12-02 18:35:33,703 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 4524 transitions. Word has length 113 [2023-12-02 18:35:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:33,704 INFO L495 AbstractCegarLoop]: Abstraction has 3405 states and 4524 transitions. [2023-12-02 18:35:33,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:35:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 4524 transitions. [2023-12-02 18:35:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 18:35:33,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:33,710 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:33,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 18:35:33,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:33,911 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:35:33,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1702421611, now seen corresponding path program 1 times [2023-12-02 18:35:33,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:33,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648059021] [2023-12-02 18:35:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:35:34,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648059021] [2023-12-02 18:35:34,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648059021] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571118677] [2023-12-02 18:35:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:34,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:34,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:34,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:34,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:35:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:34,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 18:35:34,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:35,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 18:35:37,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571118677] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:37,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002625923] [2023-12-02 18:35:37,069 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-12-02 18:35:37,069 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:37,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:37,069 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:37,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:55,726 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 18:35:55,728 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2023-12-02 18:35:55,729 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 18:35:55,732 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 7 for LOIs [2023-12-02 18:35:55,785 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 7 for LOIs [2023-12-02 18:35:55,794 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 25 for LOIs [2023-12-02 18:35:55,833 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 7 for LOIs [2023-12-02 18:35:55,835 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 7 for LOIs [2023-12-02 18:35:55,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:36:01,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104727#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2023-12-02 18:36:01,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:36:01,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:36:01,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2023-12-02 18:36:01,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457137256] [2023-12-02 18:36:01,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:36:01,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 18:36:01,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:01,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 18:36:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=9800, Unknown=0, NotChecked=0, Total=10506 [2023-12-02 18:36:01,968 INFO L87 Difference]: Start difference. First operand 3405 states and 4524 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2023-12-02 18:36:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:16,012 INFO L93 Difference]: Finished difference Result 6274 states and 8013 transitions. [2023-12-02 18:36:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2023-12-02 18:36:16,013 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2023-12-02 18:36:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:16,024 INFO L225 Difference]: With dead ends: 6274 [2023-12-02 18:36:16,024 INFO L226 Difference]: Without dead ends: 5559 [2023-12-02 18:36:16,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51534 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=11465, Invalid=112791, Unknown=0, NotChecked=0, Total=124256 [2023-12-02 18:36:16,049 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 4267 mSDsluCounter, 2751 mSDsCounter, 0 mSdLazyCounter, 5350 mSolverCounterSat, 1971 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4269 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1971 IncrementalHoareTripleChecker+Valid, 5350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:16,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4269 Valid, 2957 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1971 Valid, 5350 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 18:36:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5559 states. [2023-12-02 18:36:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5559 to 3681. [2023-12-02 18:36:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 2759 states have (on average 1.2932221819499818) internal successors, (3568), 2790 states have internal predecessors, (3568), 549 states have call successors, (549), 356 states have call predecessors, (549), 371 states have return successors, (720), 536 states have call predecessors, (720), 548 states have call successors, (720) [2023-12-02 18:36:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4837 transitions. [2023-12-02 18:36:16,488 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4837 transitions. Word has length 114 [2023-12-02 18:36:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:16,489 INFO L495 AbstractCegarLoop]: Abstraction has 3681 states and 4837 transitions. [2023-12-02 18:36:16,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2023-12-02 18:36:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4837 transitions. [2023-12-02 18:36:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 18:36:16,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:16,497 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:16,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:36:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:16,698 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:16,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1351659071, now seen corresponding path program 1 times [2023-12-02 18:36:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:16,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278284567] [2023-12-02 18:36:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 18:36:17,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:17,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278284567] [2023-12-02 18:36:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278284567] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:17,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460864281] [2023-12-02 18:36:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:17,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:17,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:17,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:17,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:36:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:17,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:36:17,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 18:36:17,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:36:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 18:36:17,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460864281] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:17,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:36:17,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2023-12-02 18:36:17,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298004730] [2023-12-02 18:36:17,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:36:17,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:36:17,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:36:17,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 18:36:17,449 INFO L87 Difference]: Start difference. First operand 3681 states and 4837 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:36:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:18,530 INFO L93 Difference]: Finished difference Result 5005 states and 6385 transitions. [2023-12-02 18:36:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:36:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2023-12-02 18:36:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:18,539 INFO L225 Difference]: With dead ends: 5005 [2023-12-02 18:36:18,540 INFO L226 Difference]: Without dead ends: 4014 [2023-12-02 18:36:18,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-12-02 18:36:18,544 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 270 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:18,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 629 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:36:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2023-12-02 18:36:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 3761. [2023-12-02 18:36:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3761 states, 2804 states have (on average 1.2906562054208275) internal successors, (3619), 2838 states have internal predecessors, (3619), 568 states have call successors, (568), 365 states have call predecessors, (568), 387 states have return successors, (760), 559 states have call predecessors, (760), 567 states have call successors, (760) [2023-12-02 18:36:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 4947 transitions. [2023-12-02 18:36:19,021 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 4947 transitions. Word has length 115 [2023-12-02 18:36:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:19,021 INFO L495 AbstractCegarLoop]: Abstraction has 3761 states and 4947 transitions. [2023-12-02 18:36:19,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:36:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 4947 transitions. [2023-12-02 18:36:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:36:19,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:19,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:36:19,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:36:19,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:19,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:19,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1440492818, now seen corresponding path program 1 times [2023-12-02 18:36:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:19,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365009677] [2023-12-02 18:36:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:19,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 18:36:19,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365009677] [2023-12-02 18:36:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365009677] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383758389] [2023-12-02 18:36:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:19,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:19,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:19,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:19,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:36:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:19,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:36:19,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 18:36:19,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:36:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383758389] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:36:19,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:36:19,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 18:36:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974491746] [2023-12-02 18:36:19,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:36:19,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:36:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:36:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:36:19,493 INFO L87 Difference]: Start difference. First operand 3761 states and 4947 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 18:36:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:20,003 INFO L93 Difference]: Finished difference Result 6247 states and 8472 transitions. [2023-12-02 18:36:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:36:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 112 [2023-12-02 18:36:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:20,016 INFO L225 Difference]: With dead ends: 6247 [2023-12-02 18:36:20,016 INFO L226 Difference]: Without dead ends: 4349 [2023-12-02 18:36:20,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 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 18:36:20,024 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 181 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:20,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 215 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:36:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2023-12-02 18:36:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 4261. [2023-12-02 18:36:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 3235 states have (on average 1.2828438948995364) internal successors, (4150), 3265 states have internal predecessors, (4150), 586 states have call successors, (586), 415 states have call predecessors, (586), 438 states have return successors, (785), 582 states have call predecessors, (785), 585 states have call successors, (785) [2023-12-02 18:36:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 5521 transitions. [2023-12-02 18:36:20,599 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 5521 transitions. Word has length 112 [2023-12-02 18:36:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:20,599 INFO L495 AbstractCegarLoop]: Abstraction has 4261 states and 5521 transitions. [2023-12-02 18:36:20,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 18:36:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 5521 transitions. [2023-12-02 18:36:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:36:20,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:20,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:20,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:36:20,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:20,807 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:20,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1882799791, now seen corresponding path program 1 times [2023-12-02 18:36:20,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:20,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690524483] [2023-12-02 18:36:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:20,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 18:36:20,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690524483] [2023-12-02 18:36:20,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690524483] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334492911] [2023-12-02 18:36:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:20,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:20,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:20,871 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:20,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:36:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:21,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:36:21,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:36:21,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:36:21,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334492911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:36:21,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:36:21,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 18:36:21,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463103341] [2023-12-02 18:36:21,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:36:21,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:36:21,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:21,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:36:21,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:36:21,025 INFO L87 Difference]: Start difference. First operand 4261 states and 5521 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 18:36:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:21,561 INFO L93 Difference]: Finished difference Result 7043 states and 9366 transitions. [2023-12-02 18:36:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:36:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 112 [2023-12-02 18:36:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:21,578 INFO L225 Difference]: With dead ends: 7043 [2023-12-02 18:36:21,578 INFO L226 Difference]: Without dead ends: 4787 [2023-12-02 18:36:21,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 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 18:36:21,586 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 57 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:21,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 406 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:36:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4787 states. [2023-12-02 18:36:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4787 to 4499. [2023-12-02 18:36:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 3449 states have (on average 1.2960278341548275) internal successors, (4470), 3479 states have internal predecessors, (4470), 598 states have call successors, (598), 427 states have call predecessors, (598), 450 states have return successors, (797), 594 states have call predecessors, (797), 597 states have call successors, (797) [2023-12-02 18:36:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 5865 transitions. [2023-12-02 18:36:22,213 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 5865 transitions. Word has length 112 [2023-12-02 18:36:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:22,213 INFO L495 AbstractCegarLoop]: Abstraction has 4499 states and 5865 transitions. [2023-12-02 18:36:22,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 18:36:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 5865 transitions. [2023-12-02 18:36:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:36:22,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:22,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:36:22,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:36:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:22,421 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:22,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1870302384, now seen corresponding path program 2 times [2023-12-02 18:36:22,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:22,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336448989] [2023-12-02 18:36:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 18:36:22,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:22,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336448989] [2023-12-02 18:36:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336448989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013104075] [2023-12-02 18:36:22,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:36:22,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:22,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:22,598 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:22,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:36:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 18:36:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:36:22,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:36:22,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 18:36:22,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:36:22,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013104075] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:36:22,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:36:22,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:36:22,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867301553] [2023-12-02 18:36:22,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:36:22,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:36:22,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:22,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:36:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:36:22,749 INFO L87 Difference]: Start difference. First operand 4499 states and 5865 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (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 18:36:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:23,370 INFO L93 Difference]: Finished difference Result 7626 states and 10342 transitions. [2023-12-02 18:36:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:36:23,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (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 112 [2023-12-02 18:36:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:23,383 INFO L225 Difference]: With dead ends: 7626 [2023-12-02 18:36:23,383 INFO L226 Difference]: Without dead ends: 5132 [2023-12-02 18:36:23,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 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 18:36:23,389 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 113 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:23,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 411 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:36:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2023-12-02 18:36:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 5058. [2023-12-02 18:36:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 3907 states have (on average 1.2910161249040184) internal successors, (5044), 3941 states have internal predecessors, (5044), 657 states have call successors, (657), 470 states have call predecessors, (657), 492 states have return successors, (913), 648 states have call predecessors, (913), 656 states have call successors, (913) [2023-12-02 18:36:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 6614 transitions. [2023-12-02 18:36:23,964 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 6614 transitions. Word has length 112 [2023-12-02 18:36:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:23,964 INFO L495 AbstractCegarLoop]: Abstraction has 5058 states and 6614 transitions. [2023-12-02 18:36:23,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (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 18:36:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 6614 transitions. [2023-12-02 18:36:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 18:36:23,973 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:23,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:36:23,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 18:36:24,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:24,175 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:24,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1081878800, now seen corresponding path program 1 times [2023-12-02 18:36:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:24,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498089249] [2023-12-02 18:36:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:24,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 18:36:24,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:24,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498089249] [2023-12-02 18:36:24,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498089249] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804868728] [2023-12-02 18:36:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:24,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:24,306 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:24,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 18:36:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:24,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:36:24,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:36:24,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:36:24,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804868728] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:36:24,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:36:24,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:36:24,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070165707] [2023-12-02 18:36:24,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:36:24,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:36:24,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:36:24,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:36:24,462 INFO L87 Difference]: Start difference. First operand 5058 states and 6614 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (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 18:36:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:25,189 INFO L93 Difference]: Finished difference Result 10418 states and 14044 transitions. [2023-12-02 18:36:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:36:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (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 113 [2023-12-02 18:36:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:25,209 INFO L225 Difference]: With dead ends: 10418 [2023-12-02 18:36:25,209 INFO L226 Difference]: Without dead ends: 6549 [2023-12-02 18:36:25,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 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 18:36:25,222 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 54 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:25,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 362 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:36:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2023-12-02 18:36:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 5566. [2023-12-02 18:36:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5566 states, 4363 states have (on average 1.3091909236763695) internal successors, (5712), 4398 states have internal predecessors, (5712), 683 states have call successors, (683), 496 states have call predecessors, (683), 518 states have return successors, (939), 673 states have call predecessors, (939), 682 states have call successors, (939) [2023-12-02 18:36:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 7334 transitions. [2023-12-02 18:36:25,867 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 7334 transitions. Word has length 113 [2023-12-02 18:36:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:25,868 INFO L495 AbstractCegarLoop]: Abstraction has 5566 states and 7334 transitions. [2023-12-02 18:36:25,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (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 18:36:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 7334 transitions. [2023-12-02 18:36:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 18:36:25,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:25,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:36:25,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 18:36:26,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 18:36:26,076 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:26,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1984004511, now seen corresponding path program 1 times [2023-12-02 18:36:26,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:26,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286792485] [2023-12-02 18:36:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:36:26,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286792485] [2023-12-02 18:36:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286792485] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060124674] [2023-12-02 18:36:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:26,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:26,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:26,203 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:26,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 18:36:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:26,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:36:26,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:36:26,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:36:26,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060124674] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:36:26,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:36:26,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 18:36:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840954690] [2023-12-02 18:36:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:36:26,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:36:26,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:26,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:36:26,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:36:26,402 INFO L87 Difference]: Start difference. First operand 5566 states and 7334 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 18:36:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:27,515 INFO L93 Difference]: Finished difference Result 11986 states and 16078 transitions. [2023-12-02 18:36:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:36:27,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 115 [2023-12-02 18:36:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:27,534 INFO L225 Difference]: With dead ends: 11986 [2023-12-02 18:36:27,534 INFO L226 Difference]: Without dead ends: 7609 [2023-12-02 18:36:27,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:36:27,546 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 373 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:27,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 416 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:36:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2023-12-02 18:36:28,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 7607. [2023-12-02 18:36:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 6011 states have (on average 1.3039427715854268) internal successors, (7838), 6056 states have internal predecessors, (7838), 913 states have call successors, (913), 659 states have call predecessors, (913), 681 states have return successors, (1262), 893 states have call predecessors, (1262), 912 states have call successors, (1262) [2023-12-02 18:36:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 10013 transitions. [2023-12-02 18:36:28,360 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 10013 transitions. Word has length 115 [2023-12-02 18:36:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:28,361 INFO L495 AbstractCegarLoop]: Abstraction has 7607 states and 10013 transitions. [2023-12-02 18:36:28,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 18:36:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 10013 transitions. [2023-12-02 18:36:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 18:36:28,370 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:28,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:28,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 18:36:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 18:36:28,571 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:28,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1849534162, now seen corresponding path program 1 times [2023-12-02 18:36:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:28,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050510239] [2023-12-02 18:36:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:28,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 18:36:28,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:28,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050510239] [2023-12-02 18:36:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050510239] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62803584] [2023-12-02 18:36:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:28,638 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:28,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 18:36:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:28,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:36:28,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:36:28,793 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:36:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62803584] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:36:28,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:36:28,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 18:36:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458930996] [2023-12-02 18:36:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:36:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:36:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:36:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:36:28,795 INFO L87 Difference]: Start difference. First operand 7607 states and 10013 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:36:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:36:29,759 INFO L93 Difference]: Finished difference Result 13432 states and 18085 transitions. [2023-12-02 18:36:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:36:29,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 116 [2023-12-02 18:36:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:36:29,775 INFO L225 Difference]: With dead ends: 13432 [2023-12-02 18:36:29,775 INFO L226 Difference]: Without dead ends: 9115 [2023-12-02 18:36:29,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 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 18:36:29,785 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 61 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:36:29,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 419 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:36:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9115 states. [2023-12-02 18:36:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9115 to 8393. [2023-12-02 18:36:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8393 states, 6709 states have (on average 1.317931137278283) internal successors, (8842), 6754 states have internal predecessors, (8842), 957 states have call successors, (957), 703 states have call predecessors, (957), 725 states have return successors, (1306), 937 states have call predecessors, (1306), 956 states have call successors, (1306) [2023-12-02 18:36:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8393 states to 8393 states and 11105 transitions. [2023-12-02 18:36:30,659 INFO L78 Accepts]: Start accepts. Automaton has 8393 states and 11105 transitions. Word has length 116 [2023-12-02 18:36:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:36:30,659 INFO L495 AbstractCegarLoop]: Abstraction has 8393 states and 11105 transitions. [2023-12-02 18:36:30,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:36:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 8393 states and 11105 transitions. [2023-12-02 18:36:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 18:36:30,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:36:30,669 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:36:30,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 18:36:30,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 18:36:30,870 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:36:30,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:36:30,870 INFO L85 PathProgramCache]: Analyzing trace with hash 427073209, now seen corresponding path program 1 times [2023-12-02 18:36:30,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:36:30,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257108404] [2023-12-02 18:36:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:30,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:36:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:36:31,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:36:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257108404] [2023-12-02 18:36:31,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257108404] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:36:31,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914955068] [2023-12-02 18:36:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:36:31,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:36:31,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:36:31,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:36:31,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 18:36:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:36:31,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 18:36:31,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:36:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:36:32,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:36:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:36:33,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914955068] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:36:33,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347591989] [2023-12-02 18:36:33,763 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-12-02 18:36:33,763 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:36:33,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:36:33,764 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:36:33,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:36:42,126 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 7 for LOIs [2023-12-02 18:36:42,128 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 81 for LOIs [2023-12-02 18:36:42,172 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2023-12-02 18:36:42,175 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 135 for LOIs [2023-12-02 18:36:42,769 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 136 for LOIs [2023-12-02 18:36:43,326 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 16 for LOIs [2023-12-02 18:36:43,345 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 129 for LOIs [2023-12-02 18:36:43,443 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 140 for LOIs [2023-12-02 18:36:43,557 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:36:53,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249509#(and (= ~q_req_up~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| Int) (v_~q_req_up~0_101 Int) (|v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| Int) (v_~q_free~0_104 Int)) (and (or (and (<= v_~q_free~0_104 1) (<= 0 ~p_dw_pc~0) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1)) (and (= v_~q_free~0_104 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0))) (or (exists ((v_~p_dw_pc~0_47 Int) (v_~p_dw_st~0_133 Int)) (and (or (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (= v_~p_dw_pc~0_47 1) (= v_~p_dw_st~0_133 1) (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~q_req_up~0_101 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (<= ~p_last_write~0 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483647) (= v_~p_dw_st~0_133 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10|) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 2147483648)) (= v_~p_dw_pc~0_47 0) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 1))) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_BEFORE_CALL_10| 0)) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 0)))) (and (= ~p_dw_st~0 0) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_BEFORE_CALL_10| 0)))))) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_BEFORE_CALL_15| 0)))) (= ~c_dr_st~0 1))' at error location [2023-12-02 18:36:53,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:36:53,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:36:53,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2023-12-02 18:36:53,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473248968] [2023-12-02 18:36:53,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:36:53,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 18:36:53,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 18:36:53,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=11434, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 18:36:53,512 INFO L87 Difference]: Start difference. First operand 8393 states and 11105 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2023-12-02 18:37:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:04,157 INFO L93 Difference]: Finished difference Result 10677 states and 13807 transitions. [2023-12-02 18:37:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2023-12-02 18:37:04,158 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2023-12-02 18:37:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:04,179 INFO L225 Difference]: With dead ends: 10677 [2023-12-02 18:37:04,179 INFO L226 Difference]: Without dead ends: 9606 [2023-12-02 18:37:04,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 314 SyntacticMatches, 9 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27783 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=6817, Invalid=62089, Unknown=0, NotChecked=0, Total=68906 [2023-12-02 18:37:04,193 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 4639 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 5566 mSolverCounterSat, 2579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4639 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 8145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2579 IncrementalHoareTripleChecker+Valid, 5566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:04,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4639 Valid, 2604 Invalid, 8145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2579 Valid, 5566 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 18:37:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9606 states. [2023-12-02 18:37:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9606 to 8209. [2023-12-02 18:37:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 6597 states have (on average 1.3209034409580112) internal successors, (8714), 6641 states have internal predecessors, (8714), 917 states have call successors, (917), 671 states have call predecessors, (917), 693 states have return successors, (1256), 898 states have call predecessors, (1256), 916 states have call successors, (1256) [2023-12-02 18:37:05,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 10887 transitions. [2023-12-02 18:37:05,191 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 10887 transitions. Word has length 124 [2023-12-02 18:37:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:05,191 INFO L495 AbstractCegarLoop]: Abstraction has 8209 states and 10887 transitions. [2023-12-02 18:37:05,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2023-12-02 18:37:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 10887 transitions. [2023-12-02 18:37:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 18:37:05,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:05,200 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:05,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 18:37:05,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 18:37:05,401 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:05,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:05,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1595086911, now seen corresponding path program 1 times [2023-12-02 18:37:05,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:05,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053318203] [2023-12-02 18:37:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:05,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 18:37:05,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053318203] [2023-12-02 18:37:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053318203] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068323762] [2023-12-02 18:37:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:05,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:05,560 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:05,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 18:37:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:05,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:37:05,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 18:37:05,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:37:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 18:37:05,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068323762] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:05,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:37:05,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2023-12-02 18:37:05,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434905750] [2023-12-02 18:37:05,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:05,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:37:05,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:05,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:37:05,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:37:05,900 INFO L87 Difference]: Start difference. First operand 8209 states and 10887 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:37:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:07,306 INFO L93 Difference]: Finished difference Result 8864 states and 11628 transitions. [2023-12-02 18:37:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:37:07,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2023-12-02 18:37:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:07,319 INFO L225 Difference]: With dead ends: 8864 [2023-12-02 18:37:07,319 INFO L226 Difference]: Without dead ends: 7977 [2023-12-02 18:37:07,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-12-02 18:37:07,322 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 370 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:07,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 508 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:37:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2023-12-02 18:37:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 7940. [2023-12-02 18:37:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7940 states, 6398 states have (on average 1.3236949046577056) internal successors, (8469), 6442 states have internal predecessors, (8469), 881 states have call successors, (881), 641 states have call predecessors, (881), 659 states have return successors, (1215), 858 states have call predecessors, (1215), 880 states have call successors, (1215) [2023-12-02 18:37:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7940 states to 7940 states and 10565 transitions. [2023-12-02 18:37:08,194 INFO L78 Accepts]: Start accepts. Automaton has 7940 states and 10565 transitions. Word has length 125 [2023-12-02 18:37:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:08,195 INFO L495 AbstractCegarLoop]: Abstraction has 7940 states and 10565 transitions. [2023-12-02 18:37:08,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:37:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7940 states and 10565 transitions. [2023-12-02 18:37:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 18:37:08,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:08,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:08,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 18:37:08,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:08,402 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:08,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -438969524, now seen corresponding path program 1 times [2023-12-02 18:37:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781274407] [2023-12-02 18:37:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:08,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 18:37:08,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781274407] [2023-12-02 18:37:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781274407] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474178552] [2023-12-02 18:37:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:08,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:08,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:08,525 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:08,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 18:37:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:08,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:37:08,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:37:08,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474178552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:08,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:08,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:37:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267168576] [2023-12-02 18:37:08,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:08,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:37:08,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:37:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:37:08,695 INFO L87 Difference]: Start difference. First operand 7940 states and 10565 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 18:37:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:09,721 INFO L93 Difference]: Finished difference Result 13063 states and 18005 transitions. [2023-12-02 18:37:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:37:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 119 [2023-12-02 18:37:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:09,733 INFO L225 Difference]: With dead ends: 13063 [2023-12-02 18:37:09,733 INFO L226 Difference]: Without dead ends: 7960 [2023-12-02 18:37:09,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 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 18:37:09,744 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 93 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:09,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 418 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:37:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2023-12-02 18:37:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7888. [2023-12-02 18:37:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 6346 states have (on average 1.3011345729593444) internal successors, (8257), 6390 states have internal predecessors, (8257), 881 states have call successors, (881), 641 states have call predecessors, (881), 659 states have return successors, (1215), 858 states have call predecessors, (1215), 880 states have call successors, (1215) [2023-12-02 18:37:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 10353 transitions. [2023-12-02 18:37:10,680 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 10353 transitions. Word has length 119 [2023-12-02 18:37:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:10,680 INFO L495 AbstractCegarLoop]: Abstraction has 7888 states and 10353 transitions. [2023-12-02 18:37:10,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 18:37:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 10353 transitions. [2023-12-02 18:37:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 18:37:10,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:10,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:37:10,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 18:37:10,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:10,887 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:10,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1974764564, now seen corresponding path program 1 times [2023-12-02 18:37:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:10,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528367210] [2023-12-02 18:37:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:10,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 18:37:11,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:11,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528367210] [2023-12-02 18:37:11,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528367210] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:11,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795472027] [2023-12-02 18:37:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:11,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:11,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:11,036 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:11,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 18:37:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:11,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:37:11,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:37:11,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:11,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795472027] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:11,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:11,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 18:37:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300392466] [2023-12-02 18:37:11,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:11,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:37:11,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:37:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:37:11,178 INFO L87 Difference]: Start difference. First operand 7888 states and 10353 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 18:37:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:12,186 INFO L93 Difference]: Finished difference Result 11586 states and 15161 transitions. [2023-12-02 18:37:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:37:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 119 [2023-12-02 18:37:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:12,199 INFO L225 Difference]: With dead ends: 11586 [2023-12-02 18:37:12,200 INFO L226 Difference]: Without dead ends: 8132 [2023-12-02 18:37:12,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 120 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 18:37:12,206 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 182 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:12,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 553 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:37:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2023-12-02 18:37:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 8060. [2023-12-02 18:37:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8060 states, 6483 states have (on average 1.2981644300478175) internal successors, (8416), 6539 states have internal predecessors, (8416), 888 states have call successors, (888), 645 states have call predecessors, (888), 687 states have return successors, (1258), 877 states have call predecessors, (1258), 887 states have call successors, (1258) [2023-12-02 18:37:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8060 states to 8060 states and 10562 transitions. [2023-12-02 18:37:13,142 INFO L78 Accepts]: Start accepts. Automaton has 8060 states and 10562 transitions. Word has length 119 [2023-12-02 18:37:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:13,143 INFO L495 AbstractCegarLoop]: Abstraction has 8060 states and 10562 transitions. [2023-12-02 18:37:13,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 18:37:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 8060 states and 10562 transitions. [2023-12-02 18:37:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-02 18:37:13,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:13,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:37:13,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 18:37:13,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:13,353 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:13,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash -148174907, now seen corresponding path program 1 times [2023-12-02 18:37:13,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:13,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829314110] [2023-12-02 18:37:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:37:13,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829314110] [2023-12-02 18:37:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829314110] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764519873] [2023-12-02 18:37:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:13,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:13,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:13,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 18:37:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:13,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:37:13,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 18:37:13,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764519873] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:13,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:37:13,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706838084] [2023-12-02 18:37:13,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:13,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:37:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:37:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:37:13,628 INFO L87 Difference]: Start difference. First operand 8060 states and 10562 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 18:37:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:14,586 INFO L93 Difference]: Finished difference Result 11472 states and 15171 transitions. [2023-12-02 18:37:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:37:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 120 [2023-12-02 18:37:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:14,600 INFO L225 Difference]: With dead ends: 11472 [2023-12-02 18:37:14,600 INFO L226 Difference]: Without dead ends: 7884 [2023-12-02 18:37:14,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 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 18:37:14,607 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 22 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:14,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 366 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:37:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7884 states. [2023-12-02 18:37:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7884 to 7884. [2023-12-02 18:37:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 6331 states have (on average 1.2983730848207233) internal successors, (8220), 6381 states have internal predecessors, (8220), 888 states have call successors, (888), 645 states have call predecessors, (888), 663 states have return successors, (1222), 859 states have call predecessors, (1222), 887 states have call successors, (1222) [2023-12-02 18:37:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 10330 transitions. [2023-12-02 18:37:15,542 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 10330 transitions. Word has length 120 [2023-12-02 18:37:15,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:15,543 INFO L495 AbstractCegarLoop]: Abstraction has 7884 states and 10330 transitions. [2023-12-02 18:37:15,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 18:37:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 10330 transitions. [2023-12-02 18:37:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 18:37:15,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:15,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:37:15,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 18:37:15,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:15,750 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:15,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1990356178, now seen corresponding path program 1 times [2023-12-02 18:37:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:15,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319319075] [2023-12-02 18:37:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 18:37:15,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:15,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319319075] [2023-12-02 18:37:15,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319319075] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:15,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288642447] [2023-12-02 18:37:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:15,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:15,905 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:15,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 18:37:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:16,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:37:16,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 18:37:16,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288642447] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:16,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:16,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 18:37:16,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115511426] [2023-12-02 18:37:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:16,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:37:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:37:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:37:16,066 INFO L87 Difference]: Start difference. First operand 7884 states and 10330 transitions. Second operand has 6 states, 5 states have (on average 16.4) internal successors, (82), 6 states have internal predecessors, (82), 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 18:37:17,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:17,661 INFO L93 Difference]: Finished difference Result 18213 states and 23996 transitions. [2023-12-02 18:37:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:37:17,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 6 states have internal predecessors, (82), 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 121 [2023-12-02 18:37:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:17,680 INFO L225 Difference]: With dead ends: 18213 [2023-12-02 18:37:17,680 INFO L226 Difference]: Without dead ends: 11107 [2023-12-02 18:37:17,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:37:17,690 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 383 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:17,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 390 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:37:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11107 states. [2023-12-02 18:37:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11107 to 11105. [2023-12-02 18:37:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 8930 states have (on average 1.2760358342665175) internal successors, (11395), 8998 states have internal predecessors, (11395), 1247 states have call successors, (1247), 908 states have call predecessors, (1247), 926 states have return successors, (1712), 1200 states have call predecessors, (1712), 1246 states have call successors, (1712) [2023-12-02 18:37:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 14354 transitions. [2023-12-02 18:37:19,071 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 14354 transitions. Word has length 121 [2023-12-02 18:37:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:19,072 INFO L495 AbstractCegarLoop]: Abstraction has 11105 states and 14354 transitions. [2023-12-02 18:37:19,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 6 states have internal predecessors, (82), 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 18:37:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 14354 transitions. [2023-12-02 18:37:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 18:37:19,081 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:19,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:37:19,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 18:37:19,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 18:37:19,282 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:19,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:19,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1454634488, now seen corresponding path program 1 times [2023-12-02 18:37:19,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:19,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368000030] [2023-12-02 18:37:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:19,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 18:37:19,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368000030] [2023-12-02 18:37:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368000030] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55719669] [2023-12-02 18:37:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:19,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:19,342 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:19,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 18:37:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:19,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:37:19,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:37:19,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:19,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55719669] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:19,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:19,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 18:37:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057078553] [2023-12-02 18:37:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:19,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:37:19,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:37:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:37:19,479 INFO L87 Difference]: Start difference. First operand 11105 states and 14354 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 18:37:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:21,093 INFO L93 Difference]: Finished difference Result 20605 states and 26994 transitions. [2023-12-02 18:37:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:37:21,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 121 [2023-12-02 18:37:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:21,118 INFO L225 Difference]: With dead ends: 20605 [2023-12-02 18:37:21,118 INFO L226 Difference]: Without dead ends: 13713 [2023-12-02 18:37:21,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 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 18:37:21,129 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 66 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:21,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 426 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:37:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13713 states. [2023-12-02 18:37:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13713 to 12435. [2023-12-02 18:37:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12435 states, 10084 states have (on average 1.2811384371281238) internal successors, (12919), 10152 states have internal predecessors, (12919), 1335 states have call successors, (1335), 996 states have call predecessors, (1335), 1014 states have return successors, (1800), 1288 states have call predecessors, (1800), 1334 states have call successors, (1800) [2023-12-02 18:37:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12435 states to 12435 states and 16054 transitions. [2023-12-02 18:37:22,623 INFO L78 Accepts]: Start accepts. Automaton has 12435 states and 16054 transitions. Word has length 121 [2023-12-02 18:37:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:22,623 INFO L495 AbstractCegarLoop]: Abstraction has 12435 states and 16054 transitions. [2023-12-02 18:37:22,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 18:37:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12435 states and 16054 transitions. [2023-12-02 18:37:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 18:37:22,633 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:22,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:37:22,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 18:37:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 18:37:22,834 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:22,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash -918206547, now seen corresponding path program 1 times [2023-12-02 18:37:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:22,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056049982] [2023-12-02 18:37:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:22,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:37:22,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:22,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056049982] [2023-12-02 18:37:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056049982] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116036688] [2023-12-02 18:37:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:22,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:22,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:22,954 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:22,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 18:37:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:23,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:37:23,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:37:23,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:23,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116036688] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:23,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:23,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 18:37:23,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951334765] [2023-12-02 18:37:23,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:23,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:37:23,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:23,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:37:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:37:23,110 INFO L87 Difference]: Start difference. First operand 12435 states and 16054 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 18:37:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:24,762 INFO L93 Difference]: Finished difference Result 22164 states and 29241 transitions. [2023-12-02 18:37:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:37:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 125 [2023-12-02 18:37:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:24,787 INFO L225 Difference]: With dead ends: 22164 [2023-12-02 18:37:24,787 INFO L226 Difference]: Without dead ends: 13942 [2023-12-02 18:37:24,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 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 18:37:24,798 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 163 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:24,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 228 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:37:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13942 states. [2023-12-02 18:37:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13942 to 13802. [2023-12-02 18:37:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 11343 states have (on average 1.2642158159217138) internal successors, (14340), 11411 states have internal predecessors, (14340), 1348 states have call successors, (1348), 1091 states have call predecessors, (1348), 1109 states have return successors, (1989), 1301 states have call predecessors, (1989), 1347 states have call successors, (1989) [2023-12-02 18:37:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 17677 transitions. [2023-12-02 18:37:26,612 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 17677 transitions. Word has length 125 [2023-12-02 18:37:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:26,612 INFO L495 AbstractCegarLoop]: Abstraction has 13802 states and 17677 transitions. [2023-12-02 18:37:26,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 18:37:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 17677 transitions. [2023-12-02 18:37:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 18:37:26,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:26,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:26,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-02 18:37:26,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 18:37:26,823 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:26,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1295143151, now seen corresponding path program 1 times [2023-12-02 18:37:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:26,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103848902] [2023-12-02 18:37:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:26,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 18:37:26,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:26,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103848902] [2023-12-02 18:37:26,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103848902] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:26,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119798679] [2023-12-02 18:37:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:26,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:26,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:26,865 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:26,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 18:37:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:26,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:37:26,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:37:27,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119798679] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:27,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:27,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 18:37:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248556467] [2023-12-02 18:37:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:27,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:37:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:37:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:37:27,002 INFO L87 Difference]: Start difference. First operand 13802 states and 17677 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 18:37:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:28,722 INFO L93 Difference]: Finished difference Result 22926 states and 30241 transitions. [2023-12-02 18:37:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:37:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 125 [2023-12-02 18:37:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:28,746 INFO L225 Difference]: With dead ends: 22926 [2023-12-02 18:37:28,746 INFO L226 Difference]: Without dead ends: 13777 [2023-12-02 18:37:28,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 18:37:28,759 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 90 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:28,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 432 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:37:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13777 states. [2023-12-02 18:37:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13777 to 13626. [2023-12-02 18:37:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13626 states, 11167 states have (on average 1.2381122951553685) internal successors, (13826), 11235 states have internal predecessors, (13826), 1348 states have call successors, (1348), 1091 states have call predecessors, (1348), 1109 states have return successors, (1989), 1301 states have call predecessors, (1989), 1347 states have call successors, (1989) [2023-12-02 18:37:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13626 states to 13626 states and 17163 transitions. [2023-12-02 18:37:30,347 INFO L78 Accepts]: Start accepts. Automaton has 13626 states and 17163 transitions. Word has length 125 [2023-12-02 18:37:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:30,347 INFO L495 AbstractCegarLoop]: Abstraction has 13626 states and 17163 transitions. [2023-12-02 18:37:30,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 18:37:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 13626 states and 17163 transitions. [2023-12-02 18:37:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 18:37:30,357 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:30,357 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:30,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 18:37:30,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 18:37:30,558 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:30,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1041359934, now seen corresponding path program 1 times [2023-12-02 18:37:30,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:30,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203444941] [2023-12-02 18:37:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:30,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:37:30,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:30,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203444941] [2023-12-02 18:37:30,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203444941] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:30,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421480442] [2023-12-02 18:37:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:30,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:30,876 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:30,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 18:37:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:30,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:37:30,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:37:31,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421480442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:31,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 18 [2023-12-02 18:37:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572362461] [2023-12-02 18:37:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:37:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:37:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:37:31,063 INFO L87 Difference]: Start difference. First operand 13626 states and 17163 transitions. Second operand has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:37:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:33,336 INFO L93 Difference]: Finished difference Result 27589 states and 35301 transitions. [2023-12-02 18:37:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:37:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 124 [2023-12-02 18:37:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:33,363 INFO L225 Difference]: With dead ends: 27589 [2023-12-02 18:37:33,363 INFO L226 Difference]: Without dead ends: 16097 [2023-12-02 18:37:33,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:37:33,374 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 158 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:33,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1228 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:37:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2023-12-02 18:37:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 13787. [2023-12-02 18:37:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 11328 states have (on average 1.2366701977401129) internal successors, (14009), 11391 states have internal predecessors, (14009), 1344 states have call successors, (1344), 1095 states have call predecessors, (1344), 1113 states have return successors, (1955), 1302 states have call predecessors, (1955), 1343 states have call successors, (1955) [2023-12-02 18:37:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 17308 transitions. [2023-12-02 18:37:35,170 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 17308 transitions. Word has length 124 [2023-12-02 18:37:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:35,171 INFO L495 AbstractCegarLoop]: Abstraction has 13787 states and 17308 transitions. [2023-12-02 18:37:35,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:37:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 17308 transitions. [2023-12-02 18:37:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 18:37:35,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:35,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:35,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 18:37:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:35,384 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:35,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1007378861, now seen corresponding path program 1 times [2023-12-02 18:37:35,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:35,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869846642] [2023-12-02 18:37:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:35,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 18:37:35,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:35,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869846642] [2023-12-02 18:37:35,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869846642] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:35,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797974555] [2023-12-02 18:37:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:35,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:35,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:35,546 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:35,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 18:37:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:35,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:37:35,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:37:35,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797974555] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:35,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:35,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 18:37:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742729480] [2023-12-02 18:37:35,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:35,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:37:35,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:37:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:37:35,724 INFO L87 Difference]: Start difference. First operand 13787 states and 17308 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:37:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:38,252 INFO L93 Difference]: Finished difference Result 26701 states and 33837 transitions. [2023-12-02 18:37:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:37:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 127 [2023-12-02 18:37:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:38,287 INFO L225 Difference]: With dead ends: 26701 [2023-12-02 18:37:38,287 INFO L226 Difference]: Without dead ends: 17496 [2023-12-02 18:37:38,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:37:38,298 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 219 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:38,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 567 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:37:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17496 states. [2023-12-02 18:37:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17496 to 16389. [2023-12-02 18:37:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 13424 states have (on average 1.229886769964243) internal successors, (16510), 13478 states have internal predecessors, (16510), 1646 states have call successors, (1646), 1328 states have call predecessors, (1646), 1317 states have return successors, (2479), 1584 states have call predecessors, (2479), 1645 states have call successors, (2479) [2023-12-02 18:37:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 20635 transitions. [2023-12-02 18:37:40,502 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 20635 transitions. Word has length 127 [2023-12-02 18:37:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:40,502 INFO L495 AbstractCegarLoop]: Abstraction has 16389 states and 20635 transitions. [2023-12-02 18:37:40,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:37:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 20635 transitions. [2023-12-02 18:37:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 18:37:40,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:40,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:40,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 18:37:40,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:40,711 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:40,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -647579307, now seen corresponding path program 1 times [2023-12-02 18:37:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311795742] [2023-12-02 18:37:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 18:37:41,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:41,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311795742] [2023-12-02 18:37:41,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311795742] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:41,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:37:41,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 18:37:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880492020] [2023-12-02 18:37:41,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:41,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:37:41,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:37:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:37:41,014 INFO L87 Difference]: Start difference. First operand 16389 states and 20635 transitions. Second operand has 11 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 18:37:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:44,896 INFO L93 Difference]: Finished difference Result 38949 states and 49832 transitions. [2023-12-02 18:37:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 18:37:44,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 122 [2023-12-02 18:37:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:44,935 INFO L225 Difference]: With dead ends: 38949 [2023-12-02 18:37:44,936 INFO L226 Difference]: Without dead ends: 23852 [2023-12-02 18:37:44,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:37:44,953 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 812 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:44,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 632 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:37:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23852 states. [2023-12-02 18:37:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23852 to 17443. [2023-12-02 18:37:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 14407 states have (on average 1.2238495175956132) internal successors, (17632), 14484 states have internal predecessors, (17632), 1636 states have call successors, (1636), 1366 states have call predecessors, (1636), 1398 states have return successors, (2362), 1594 states have call predecessors, (2362), 1635 states have call successors, (2362) [2023-12-02 18:37:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 21630 transitions. [2023-12-02 18:37:47,324 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 21630 transitions. Word has length 122 [2023-12-02 18:37:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:47,325 INFO L495 AbstractCegarLoop]: Abstraction has 17443 states and 21630 transitions. [2023-12-02 18:37:47,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 18:37:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 21630 transitions. [2023-12-02 18:37:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 18:37:47,331 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:47,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-12-02 18:37:47,331 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:47,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:47,331 INFO L85 PathProgramCache]: Analyzing trace with hash -324753223, now seen corresponding path program 1 times [2023-12-02 18:37:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:47,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479627543] [2023-12-02 18:37:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 18:37:47,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:47,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479627543] [2023-12-02 18:37:47,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479627543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:47,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:37:47,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:37:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605302997] [2023-12-02 18:37:47,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:37:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:37:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:37:47,453 INFO L87 Difference]: Start difference. First operand 17443 states and 21630 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:37:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:51,048 INFO L93 Difference]: Finished difference Result 39988 states and 49882 transitions. [2023-12-02 18:37:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:37:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-12-02 18:37:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:51,082 INFO L225 Difference]: With dead ends: 39988 [2023-12-02 18:37:51,082 INFO L226 Difference]: Without dead ends: 20611 [2023-12-02 18:37:51,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:37:51,100 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 111 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:51,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 622 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:37:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2023-12-02 18:37:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 20039. [2023-12-02 18:37:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20039 states, 16394 states have (on average 1.2093448822740027) internal successors, (19826), 16502 states have internal predecessors, (19826), 1986 states have call successors, (1986), 1644 states have call predecessors, (1986), 1657 states have return successors, (2852), 1894 states have call predecessors, (2852), 1985 states have call successors, (2852) [2023-12-02 18:37:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20039 states to 20039 states and 24664 transitions. [2023-12-02 18:37:53,810 INFO L78 Accepts]: Start accepts. Automaton has 20039 states and 24664 transitions. Word has length 123 [2023-12-02 18:37:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:53,811 INFO L495 AbstractCegarLoop]: Abstraction has 20039 states and 24664 transitions. [2023-12-02 18:37:53,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:37:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 20039 states and 24664 transitions. [2023-12-02 18:37:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 18:37:53,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:53,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:53,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 18:37:53,819 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:37:53,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:53,819 INFO L85 PathProgramCache]: Analyzing trace with hash 791867022, now seen corresponding path program 1 times [2023-12-02 18:37:53,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:53,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217343670] [2023-12-02 18:37:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:53,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-02 18:37:53,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:53,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217343670] [2023-12-02 18:37:53,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217343670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476675045] [2023-12-02 18:37:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:53,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:53,911 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:53,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 18:37:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:54,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:37:54,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 18:37:54,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:37:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476675045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:37:54,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:37:54,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 18:37:54,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630377031] [2023-12-02 18:37:54,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:37:54,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:37:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:37:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:37:54,090 INFO L87 Difference]: Start difference. First operand 20039 states and 24664 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 18:37:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:57,336 INFO L93 Difference]: Finished difference Result 40033 states and 50447 transitions. [2023-12-02 18:37:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:37:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 149 [2023-12-02 18:37:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:57,370 INFO L225 Difference]: With dead ends: 40033 [2023-12-02 18:37:57,370 INFO L226 Difference]: Without dead ends: 22373 [2023-12-02 18:37:57,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 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 18:37:57,388 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 164 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:57,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 227 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:37:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22373 states. [2023-12-02 18:38:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22373 to 21448. [2023-12-02 18:38:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21448 states, 17684 states have (on average 1.1874010404885773) internal successors, (20998), 17857 states have internal predecessors, (20998), 1986 states have call successors, (1986), 1689 states have call predecessors, (1986), 1776 states have return successors, (3030), 1903 states have call predecessors, (3030), 1985 states have call successors, (3030) [2023-12-02 18:38:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21448 states to 21448 states and 26014 transitions. [2023-12-02 18:38:00,527 INFO L78 Accepts]: Start accepts. Automaton has 21448 states and 26014 transitions. Word has length 149 [2023-12-02 18:38:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:38:00,527 INFO L495 AbstractCegarLoop]: Abstraction has 21448 states and 26014 transitions. [2023-12-02 18:38:00,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 18:38:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 21448 states and 26014 transitions. [2023-12-02 18:38:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 18:38:00,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:38:00,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:38:00,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 18:38:00,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:38:00,736 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:38:00,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:38:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash -265826248, now seen corresponding path program 1 times [2023-12-02 18:38:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:38:00,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199092631] [2023-12-02 18:38:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:38:00,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:38:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:38:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 18:38:00,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:38:00,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199092631] [2023-12-02 18:38:00,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199092631] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:38:00,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645711261] [2023-12-02 18:38:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:38:00,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:38:00,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:38:00,857 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:38:00,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 18:38:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:38:00,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:38:00,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:38:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:38:01,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:38:01,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645711261] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:38:01,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:38:01,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 18:38:01,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000894361] [2023-12-02 18:38:01,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:38:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:38:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:38:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:38:01,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:38:01,049 INFO L87 Difference]: Start difference. First operand 21448 states and 26014 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 18:38:05,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:38:05,539 INFO L93 Difference]: Finished difference Result 47586 states and 58389 transitions. [2023-12-02 18:38:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:38:05,540 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), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 152 [2023-12-02 18:38:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:38:05,596 INFO L225 Difference]: With dead ends: 47586 [2023-12-02 18:38:05,596 INFO L226 Difference]: Without dead ends: 29801 [2023-12-02 18:38:05,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:38:05,616 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 234 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:38:05,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 676 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:38:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29801 states. [2023-12-02 18:38:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29801 to 27743. [2023-12-02 18:38:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27743 states, 22761 states have (on average 1.1760906814287597) internal successors, (26769), 23030 states have internal predecessors, (26769), 2632 states have call successors, (2632), 2209 states have call predecessors, (2632), 2348 states have return successors, (4414), 2505 states have call predecessors, (4414), 2631 states have call successors, (4414) [2023-12-02 18:38:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27743 states to 27743 states and 33815 transitions. [2023-12-02 18:38:09,892 INFO L78 Accepts]: Start accepts. Automaton has 27743 states and 33815 transitions. Word has length 152 [2023-12-02 18:38:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:38:09,892 INFO L495 AbstractCegarLoop]: Abstraction has 27743 states and 33815 transitions. [2023-12-02 18:38:09,892 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), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 18:38:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 27743 states and 33815 transitions. [2023-12-02 18:38:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-02 18:38:09,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:38:09,909 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:38:09,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-02 18:38:10,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-02 18:38:10,109 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:38:10,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:38:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash -905851441, now seen corresponding path program 1 times [2023-12-02 18:38:10,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:38:10,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283182247] [2023-12-02 18:38:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:38:10,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:38:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:38:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-12-02 18:38:10,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:38:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283182247] [2023-12-02 18:38:10,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283182247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:38:10,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:38:10,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:38:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942986788] [2023-12-02 18:38:10,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:38:10,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:38:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:38:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:38:10,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:38:10,228 INFO L87 Difference]: Start difference. First operand 27743 states and 33815 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:38:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:38:25,801 INFO L93 Difference]: Finished difference Result 121065 states and 148699 transitions. [2023-12-02 18:38:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:38:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 181 [2023-12-02 18:38:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:38:26,029 INFO L225 Difference]: With dead ends: 121065 [2023-12-02 18:38:26,029 INFO L226 Difference]: Without dead ends: 105207 [2023-12-02 18:38:26,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 18:38:26,061 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 486 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:38:26,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1414 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:38:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105207 states. [2023-12-02 18:38:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105207 to 100534. [2023-12-02 18:38:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100534 states, 82508 states have (on average 1.1842851602268871) internal successors, (97713), 83434 states have internal predecessors, (97713), 9572 states have call successors, (9572), 7861 states have call predecessors, (9572), 8452 states have return successors, (16100), 9240 states have call predecessors, (16100), 9571 states have call successors, (16100) [2023-12-02 18:38:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100534 states to 100534 states and 123385 transitions. [2023-12-02 18:38:41,257 INFO L78 Accepts]: Start accepts. Automaton has 100534 states and 123385 transitions. Word has length 181 [2023-12-02 18:38:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:38:41,258 INFO L495 AbstractCegarLoop]: Abstraction has 100534 states and 123385 transitions. [2023-12-02 18:38:41,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:38:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 100534 states and 123385 transitions. [2023-12-02 18:38:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-02 18:38:41,283 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:38:41,283 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:38:41,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-12-02 18:38:41,284 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:38:41,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:38:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1347717916, now seen corresponding path program 1 times [2023-12-02 18:38:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:38:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388485227] [2023-12-02 18:38:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:38:41,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:38:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:38:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 115 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-12-02 18:38:41,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:38:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388485227] [2023-12-02 18:38:41,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388485227] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:38:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376973145] [2023-12-02 18:38:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:38:41,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:38:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:38:41,709 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:38:41,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 18:38:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:38:41,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:38:41,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:38:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 18:38:41,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:38:41,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376973145] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:38:41,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:38:41,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [19] total 26 [2023-12-02 18:38:41,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674370577] [2023-12-02 18:38:41,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:38:41,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:38:41,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:38:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:38:41,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2023-12-02 18:38:41,965 INFO L87 Difference]: Start difference. First operand 100534 states and 123385 transitions. Second operand has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2023-12-02 18:38:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:38:56,842 INFO L93 Difference]: Finished difference Result 100781 states and 123657 transitions. [2023-12-02 18:38:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:38:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) Word has length 220 [2023-12-02 18:38:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:38:57,061 INFO L225 Difference]: With dead ends: 100781 [2023-12-02 18:38:57,062 INFO L226 Difference]: Without dead ends: 99805 [2023-12-02 18:38:57,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2023-12-02 18:38:57,088 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 171 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:38:57,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1387 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:38:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99805 states. [2023-12-02 18:39:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99805 to 99805. [2023-12-02 18:39:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99805 states, 82013 states have (on average 1.1847755843585772) internal successors, (97167), 82927 states have internal predecessors, (97167), 9456 states have call successors, (9456), 7762 states have call predecessors, (9456), 8335 states have return successors, (15955), 9116 states have call predecessors, (15955), 9456 states have call successors, (15955) [2023-12-02 18:39:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99805 states to 99805 states and 122578 transitions. [2023-12-02 18:39:12,114 INFO L78 Accepts]: Start accepts. Automaton has 99805 states and 122578 transitions. Word has length 220 [2023-12-02 18:39:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:12,114 INFO L495 AbstractCegarLoop]: Abstraction has 99805 states and 122578 transitions. [2023-12-02 18:39:12,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2023-12-02 18:39:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 99805 states and 122578 transitions. [2023-12-02 18:39:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-02 18:39:12,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:12,271 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:12,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 18:39:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-02 18:39:12,472 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:12,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash -292531447, now seen corresponding path program 1 times [2023-12-02 18:39:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226483551] [2023-12-02 18:39:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-12-02 18:39:12,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:12,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226483551] [2023-12-02 18:39:12,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226483551] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:12,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495386439] [2023-12-02 18:39:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:12,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:12,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:12,657 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:12,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 18:39:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:12,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:39:12,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-02 18:39:12,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495386439] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:12,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 18:39:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131808163] [2023-12-02 18:39:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:12,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:39:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:39:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:39:12,860 INFO L87 Difference]: Start difference. First operand 99805 states and 122578 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:39:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:32,252 INFO L93 Difference]: Finished difference Result 239458 states and 294182 transitions. [2023-12-02 18:39:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:39:32,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 195 [2023-12-02 18:39:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:32,583 INFO L225 Difference]: With dead ends: 239458 [2023-12-02 18:39:32,583 INFO L226 Difference]: Without dead ends: 139716 [2023-12-02 18:39:32,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:39:32,863 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 277 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:32,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 290 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:39:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139716 states. [2023-12-02 18:39:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139716 to 138146. [2023-12-02 18:39:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138146 states, 112568 states have (on average 1.1653578281572028) internal successors, (131182), 113764 states have internal predecessors, (131182), 13613 states have call successors, (13613), 11055 states have call predecessors, (13613), 11964 states have return successors, (23912), 13327 states have call predecessors, (23912), 13613 states have call successors, (23912) [2023-12-02 18:39:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138146 states to 138146 states and 168707 transitions. [2023-12-02 18:39:55,161 INFO L78 Accepts]: Start accepts. Automaton has 138146 states and 168707 transitions. Word has length 195 [2023-12-02 18:39:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:55,162 INFO L495 AbstractCegarLoop]: Abstraction has 138146 states and 168707 transitions. [2023-12-02 18:39:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 18:39:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 138146 states and 168707 transitions. [2023-12-02 18:39:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 18:39:55,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:55,187 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:55,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 18:39:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-02 18:39:55,388 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:55,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1936949967, now seen corresponding path program 1 times [2023-12-02 18:39:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:55,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805786445] [2023-12-02 18:39:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:55,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 30 proven. 47 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-12-02 18:39:55,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805786445] [2023-12-02 18:39:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805786445] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486274179] [2023-12-02 18:39:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:55,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:55,615 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:55,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 18:39:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:55,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:39:55,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 29 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 18:39:55,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:39:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2023-12-02 18:39:56,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486274179] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:56,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:39:56,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 6] total 17 [2023-12-02 18:39:56,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295128675] [2023-12-02 18:39:56,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:56,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:39:56,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:39:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:39:56,096 INFO L87 Difference]: Start difference. First operand 138146 states and 168707 transitions. Second operand has 7 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 18:40:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:06,884 INFO L93 Difference]: Finished difference Result 195886 states and 238208 transitions. [2023-12-02 18:40:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:40:06,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 197 [2023-12-02 18:40:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:07,009 INFO L225 Difference]: With dead ends: 195886 [2023-12-02 18:40:07,009 INFO L226 Difference]: Without dead ends: 62252 [2023-12-02 18:40:07,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:40:07,128 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 137 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:07,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 174 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:40:07,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62252 states. [2023-12-02 18:40:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62252 to 57999. [2023-12-02 18:40:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57999 states, 47001 states have (on average 1.1306780706793473) internal successors, (53143), 47185 states have internal predecessors, (53143), 6066 states have call successors, (6066), 4903 states have call predecessors, (6066), 4931 states have return successors, (7670), 5911 states have call predecessors, (7670), 6066 states have call successors, (7670) [2023-12-02 18:40:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57999 states to 57999 states and 66879 transitions. [2023-12-02 18:40:16,882 INFO L78 Accepts]: Start accepts. Automaton has 57999 states and 66879 transitions. Word has length 197 [2023-12-02 18:40:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:16,882 INFO L495 AbstractCegarLoop]: Abstraction has 57999 states and 66879 transitions. [2023-12-02 18:40:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 18:40:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 57999 states and 66879 transitions. [2023-12-02 18:40:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-12-02 18:40:16,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:16,892 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:16,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 18:40:17,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-02 18:40:17,092 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:17,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1907592333, now seen corresponding path program 2 times [2023-12-02 18:40:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:17,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14871078] [2023-12-02 18:40:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-02 18:40:17,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:17,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14871078] [2023-12-02 18:40:17,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14871078] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:17,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15424628] [2023-12-02 18:40:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:40:17,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:17,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:17,310 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:17,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 18:40:17,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 18:40:17,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:40:17,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:40:17,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-12-02 18:40:17,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:17,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15424628] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:17,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:40:17,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-12-02 18:40:17,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260362971] [2023-12-02 18:40:17,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:17,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:40:17,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:17,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:40:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:40:17,511 INFO L87 Difference]: Start difference. First operand 57999 states and 66879 transitions. Second operand has 7 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:40:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:28,056 INFO L93 Difference]: Finished difference Result 116204 states and 134720 transitions. [2023-12-02 18:40:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:40:28,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 198 [2023-12-02 18:40:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:28,175 INFO L225 Difference]: With dead ends: 116204 [2023-12-02 18:40:28,175 INFO L226 Difference]: Without dead ends: 61184 [2023-12-02 18:40:28,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:40:28,225 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 181 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:28,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1046 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:40:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61184 states. [2023-12-02 18:40:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61184 to 55226. [2023-12-02 18:40:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55226 states, 44821 states have (on average 1.1320809442002633) internal successors, (50741), 44993 states have internal predecessors, (50741), 5727 states have call successors, (5727), 4656 states have call predecessors, (5727), 4677 states have return successors, (7289), 5577 states have call predecessors, (7289), 5727 states have call successors, (7289) [2023-12-02 18:40:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55226 states to 55226 states and 63757 transitions. [2023-12-02 18:40:36,914 INFO L78 Accepts]: Start accepts. Automaton has 55226 states and 63757 transitions. Word has length 198 [2023-12-02 18:40:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:36,914 INFO L495 AbstractCegarLoop]: Abstraction has 55226 states and 63757 transitions. [2023-12-02 18:40:36,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:40:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 55226 states and 63757 transitions. [2023-12-02 18:40:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-12-02 18:40:36,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:36,923 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 18:40:36,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 18:40:37,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 18:40:37,123 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:37,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:37,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1756467432, now seen corresponding path program 1 times [2023-12-02 18:40:37,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:37,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255091796] [2023-12-02 18:40:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:37,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-02 18:40:37,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:37,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255091796] [2023-12-02 18:40:37,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255091796] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:37,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542609304] [2023-12-02 18:40:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:37,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:37,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:37,259 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:37,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 18:40:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:37,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:40:37,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-02 18:40:37,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542609304] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:37,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:40:37,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-12-02 18:40:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759276833] [2023-12-02 18:40:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:40:37,437 INFO L87 Difference]: Start difference. First operand 55226 states and 63757 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:40:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:45,473 INFO L93 Difference]: Finished difference Result 91437 states and 105760 transitions. [2023-12-02 18:40:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:40:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 200 [2023-12-02 18:40:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:45,585 INFO L225 Difference]: With dead ends: 91437 [2023-12-02 18:40:45,585 INFO L226 Difference]: Without dead ends: 54395 [2023-12-02 18:40:45,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:40:45,626 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 103 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:45,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 419 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:40:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54395 states. [2023-12-02 18:40:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54395 to 53683. [2023-12-02 18:40:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53683 states, 43559 states have (on average 1.1260589086067174) internal successors, (49050), 43776 states have internal predecessors, (49050), 5568 states have call successors, (5568), 4497 states have call predecessors, (5568), 4555 states have return successors, (7130), 5410 states have call predecessors, (7130), 5568 states have call successors, (7130) [2023-12-02 18:40:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53683 states to 53683 states and 61748 transitions. [2023-12-02 18:40:54,076 INFO L78 Accepts]: Start accepts. Automaton has 53683 states and 61748 transitions. Word has length 200 [2023-12-02 18:40:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:54,077 INFO L495 AbstractCegarLoop]: Abstraction has 53683 states and 61748 transitions. [2023-12-02 18:40:54,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:40:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 53683 states and 61748 transitions. [2023-12-02 18:40:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-12-02 18:40:54,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:54,085 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 18:40:54,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 18:40:54,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 18:40:54,286 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:54,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:54,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1072446050, now seen corresponding path program 1 times [2023-12-02 18:40:54,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:54,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055517868] [2023-12-02 18:40:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:54,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 18:40:54,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:54,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055517868] [2023-12-02 18:40:54,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055517868] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:54,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577821684] [2023-12-02 18:40:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:54,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:54,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:54,931 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:54,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 18:40:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:55,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:40:55,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 135 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 18:40:55,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:40:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-02 18:40:55,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577821684] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:55,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:40:55,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18, 6] total 23 [2023-12-02 18:40:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550142787] [2023-12-02 18:40:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:40:55,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:40:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:40:55,321 INFO L87 Difference]: Start difference. First operand 53683 states and 61748 transitions. Second operand has 7 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 18:41:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:01,966 INFO L93 Difference]: Finished difference Result 76889 states and 88754 transitions. [2023-12-02 18:41:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:41:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 200 [2023-12-02 18:41:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:02,036 INFO L225 Difference]: With dead ends: 76889 [2023-12-02 18:41:02,036 INFO L226 Difference]: Without dead ends: 41390 [2023-12-02 18:41:02,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-12-02 18:41:02,067 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 239 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:02,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 174 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:41:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41390 states. [2023-12-02 18:41:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41390 to 38487. [2023-12-02 18:41:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38487 states, 31186 states have (on average 1.1254088372987878) internal successors, (35097), 31268 states have internal predecessors, (35097), 4052 states have call successors, (4052), 3303 states have call predecessors, (4052), 3248 states have return successors, (4623), 3916 states have call predecessors, (4623), 4052 states have call successors, (4623) [2023-12-02 18:41:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38487 states to 38487 states and 43772 transitions. [2023-12-02 18:41:08,559 INFO L78 Accepts]: Start accepts. Automaton has 38487 states and 43772 transitions. Word has length 200 [2023-12-02 18:41:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:08,559 INFO L495 AbstractCegarLoop]: Abstraction has 38487 states and 43772 transitions. [2023-12-02 18:41:08,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 18:41:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 38487 states and 43772 transitions. [2023-12-02 18:41:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-12-02 18:41:08,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:08,567 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 18:41:08,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 18:41:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 18:41:08,767 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:08,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1126933867, now seen corresponding path program 1 times [2023-12-02 18:41:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826709161] [2023-12-02 18:41:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 71 proven. 118 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 18:41:09,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826709161] [2023-12-02 18:41:09,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826709161] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:41:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528549909] [2023-12-02 18:41:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:09,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:09,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:09,536 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:09,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 18:41:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:09,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 18:41:09,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-12-02 18:41:09,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:41:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 98 proven. 30 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 18:41:10,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528549909] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:41:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142973760] [2023-12-02 18:41:10,188 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-12-02 18:41:10,188 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:41:10,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:41:10,189 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:41:10,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:44:14,783 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 1 for LOIs [2023-12-02 18:44:14,789 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 18:44:14,797 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-12-02 18:44:14,798 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 1 for LOIs [2023-12-02 18:44:14,817 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 18:44:14,878 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 136 for LOIs [2023-12-02 18:44:14,963 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:44:21,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2764756#(and (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~m_pc~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~m_st~0 1) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location [2023-12-02 18:44:21,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:44:21,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:44:21,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 9] total 27 [2023-12-02 18:44:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624191238] [2023-12-02 18:44:21,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:21,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 18:44:21,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:44:21,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 18:44:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=8099, Unknown=0, NotChecked=0, Total=8556 [2023-12-02 18:44:21,739 INFO L87 Difference]: Start difference. First operand 38487 states and 43772 transitions. Second operand has 27 states, 21 states have (on average 13.19047619047619) internal successors, (277), 24 states have internal predecessors, (277), 11 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (46), 12 states have call predecessors, (46), 11 states have call successors, (46) [2023-12-02 18:44:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:31,347 INFO L93 Difference]: Finished difference Result 69952 states and 80556 transitions. [2023-12-02 18:44:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-02 18:44:31,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 13.19047619047619) internal successors, (277), 24 states have internal predecessors, (277), 11 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (46), 12 states have call predecessors, (46), 11 states have call successors, (46) Word has length 201 [2023-12-02 18:44:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:31,414 INFO L225 Difference]: With dead ends: 69952 [2023-12-02 18:44:31,414 INFO L226 Difference]: Without dead ends: 35723 [2023-12-02 18:44:31,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 546 SyntacticMatches, 9 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7018 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1425, Invalid=16397, Unknown=0, NotChecked=0, Total=17822 [2023-12-02 18:44:31,450 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1378 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:31,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1385 Valid, 1703 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 18:44:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2023-12-02 18:44:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 20845. [2023-12-02 18:44:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20845 states, 16751 states have (on average 1.1210077010327741) internal successors, (18778), 16754 states have internal predecessors, (18778), 2303 states have call successors, (2303), 1860 states have call predecessors, (2303), 1790 states have return successors, (2511), 2231 states have call predecessors, (2511), 2303 states have call successors, (2511) [2023-12-02 18:44:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20845 states to 20845 states and 23592 transitions. [2023-12-02 18:44:35,540 INFO L78 Accepts]: Start accepts. Automaton has 20845 states and 23592 transitions. Word has length 201 [2023-12-02 18:44:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:35,541 INFO L495 AbstractCegarLoop]: Abstraction has 20845 states and 23592 transitions. [2023-12-02 18:44:35,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 13.19047619047619) internal successors, (277), 24 states have internal predecessors, (277), 11 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (46), 12 states have call predecessors, (46), 11 states have call successors, (46) [2023-12-02 18:44:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 20845 states and 23592 transitions. [2023-12-02 18:44:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-12-02 18:44:35,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:35,551 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:35,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 18:44:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-12-02 18:44:35,751 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:44:35,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1925712002, now seen corresponding path program 1 times [2023-12-02 18:44:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:44:35,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059750610] [2023-12-02 18:44:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:35,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:44:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 103 proven. 15 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-12-02 18:44:35,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:44:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059750610] [2023-12-02 18:44:35,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059750610] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977791351] [2023-12-02 18:44:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:35,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:35,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:35,886 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:35,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 18:44:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:36,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:44:36,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-12-02 18:44:36,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:44:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977791351] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:44:36,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:44:36,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-12-02 18:44:36,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879116213] [2023-12-02 18:44:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:44:36,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:44:36,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:44:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:44:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:44:36,067 INFO L87 Difference]: Start difference. First operand 20845 states and 23592 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:44:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:39,479 INFO L93 Difference]: Finished difference Result 31411 states and 35550 transitions. [2023-12-02 18:44:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:44:39,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 218 [2023-12-02 18:44:39,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:39,509 INFO L225 Difference]: With dead ends: 31411 [2023-12-02 18:44:39,509 INFO L226 Difference]: Without dead ends: 17659 [2023-12-02 18:44:39,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:44:39,524 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 79 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:39,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 392 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:44:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17659 states. [2023-12-02 18:44:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17659 to 15257. [2023-12-02 18:44:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15257 states, 12347 states have (on average 1.1143597635053049) internal successors, (13759), 12383 states have internal predecessors, (13759), 1634 states have call successors, (1634), 1303 states have call predecessors, (1634), 1275 states have return successors, (1744), 1571 states have call predecessors, (1744), 1634 states have call successors, (1744) [2023-12-02 18:44:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15257 states to 15257 states and 17137 transitions. [2023-12-02 18:44:42,457 INFO L78 Accepts]: Start accepts. Automaton has 15257 states and 17137 transitions. Word has length 218 [2023-12-02 18:44:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:42,458 INFO L495 AbstractCegarLoop]: Abstraction has 15257 states and 17137 transitions. [2023-12-02 18:44:42,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:44:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 15257 states and 17137 transitions. [2023-12-02 18:44:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-02 18:44:42,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:42,467 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:42,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 18:44:42,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-02 18:44:42,667 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:44:42,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1438306541, now seen corresponding path program 1 times [2023-12-02 18:44:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:44:42,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940379724] [2023-12-02 18:44:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:44:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 161 proven. 38 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-12-02 18:44:42,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:44:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940379724] [2023-12-02 18:44:42,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940379724] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039649202] [2023-12-02 18:44:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:42,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:42,989 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:42,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 18:44:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:43,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:44:43,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-12-02 18:44:43,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:44:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039649202] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:44:43,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:44:43,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 18:44:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019613484] [2023-12-02 18:44:43,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:44:43,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:44:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:44:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:44:43,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:44:43,169 INFO L87 Difference]: Start difference. First operand 15257 states and 17137 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:44:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:45,344 INFO L93 Difference]: Finished difference Result 23452 states and 26284 transitions. [2023-12-02 18:44:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:44:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 220 [2023-12-02 18:44:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:45,362 INFO L225 Difference]: With dead ends: 23452 [2023-12-02 18:44:45,362 INFO L226 Difference]: Without dead ends: 11132 [2023-12-02 18:44:45,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:44:45,376 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 98 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:45,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 411 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:44:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2023-12-02 18:44:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 10554. [2023-12-02 18:44:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10554 states, 8583 states have (on average 1.1099848537807293) internal successors, (9527), 8610 states have internal predecessors, (9527), 1102 states have call successors, (1102), 885 states have call predecessors, (1102), 868 states have return successors, (1174), 1059 states have call predecessors, (1174), 1102 states have call successors, (1174) [2023-12-02 18:44:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10554 states to 10554 states and 11803 transitions. [2023-12-02 18:44:47,398 INFO L78 Accepts]: Start accepts. Automaton has 10554 states and 11803 transitions. Word has length 220 [2023-12-02 18:44:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:47,399 INFO L495 AbstractCegarLoop]: Abstraction has 10554 states and 11803 transitions. [2023-12-02 18:44:47,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:44:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 10554 states and 11803 transitions. [2023-12-02 18:44:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-12-02 18:44:47,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:47,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:47,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 18:44:47,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-12-02 18:44:47,607 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:44:47,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:47,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1069186600, now seen corresponding path program 1 times [2023-12-02 18:44:47,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:44:47,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115612735] [2023-12-02 18:44:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:47,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:44:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 165 proven. 38 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-12-02 18:44:47,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:44:47,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115612735] [2023-12-02 18:44:47,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115612735] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:47,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506475513] [2023-12-02 18:44:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:47,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:47,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:47,924 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:47,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 18:44:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:48,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 18:44:48,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 18:44:48,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:44:48,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506475513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:44:48,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:44:48,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2023-12-02 18:44:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208816769] [2023-12-02 18:44:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:44:48,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:44:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:44:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:44:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:44:48,169 INFO L87 Difference]: Start difference. First operand 10554 states and 11803 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 18:44:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:48,880 INFO L93 Difference]: Finished difference Result 11542 states and 12882 transitions. [2023-12-02 18:44:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:44:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 222 [2023-12-02 18:44:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:48,881 INFO L225 Difference]: With dead ends: 11542 [2023-12-02 18:44:48,881 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 18:44:48,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:44:48,890 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 73 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:48,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 328 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:44:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 18:44:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 18:44:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:44:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 18:44:48,891 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 222 [2023-12-02 18:44:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:48,891 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 18:44:48,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 18:44:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 18:44:48,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 18:44:48,894 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-02 18:44:48,894 INFO L805 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-02 18:44:48,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 18:44:49,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155bd2d4-cbc7-4d4d-bde7-46683741400c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:49,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 18:44:57,271 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 513 DAG size of output: 275 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 18:45:45,634 WARN L293 SmtUtils]: Spent 33.83s on a formula simplification. DAG size of input: 1662 DAG size of output: 866 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 18:45:52,687 WARN L293 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 327 DAG size of output: 159 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 18:46:27,068 WARN L293 SmtUtils]: Spent 34.36s on a formula simplification. DAG size of input: 1662 DAG size of output: 866 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 18:46:42,490 WARN L293 SmtUtils]: Spent 9.73s on a formula simplification. DAG size of input: 184 DAG size of output: 120 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 18:46:56,622 WARN L293 SmtUtils]: Spent 9.53s on a formula simplification. DAG size of input: 184 DAG size of output: 120 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 18:47:27,184 WARN L293 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 680 DAG size of output: 480 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)