./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23a748a14ab5667159adb09776d3545981eaa20034460211a51a13329e4251e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:53:57,656 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:53:57,721 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:53:57,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:53:57,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:53:57,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:53:57,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:53:57,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:53:57,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:53:57,793 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:53:57,793 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:53:57,794 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:53:57,795 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:53:57,795 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:53:57,796 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:53:57,796 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:53:57,797 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:53:57,797 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:53:57,798 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:53:57,798 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:53:57,799 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:53:57,800 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:53:57,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:53:57,801 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:53:57,801 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:53:57,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:53:57,802 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:53:57,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:53:57,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:53:57,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:53:57,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:53:57,804 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:53:57,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:53:57,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:53:57,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:53:57,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:53:57,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:53:57,807 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:53:57,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:53:57,808 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:53:57,808 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:53:57,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:53:57,809 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:53:57,810 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:53:57,810 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:53:57,811 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_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23a748a14ab5667159adb09776d3545981eaa20034460211a51a13329e4251e4 [2023-11-12 00:53:58,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:53:58,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:53:58,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:53:58,132 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:53:58,133 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:53:58,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c [2023-11-12 00:54:01,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:54:02,121 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:54:02,121 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c [2023-11-12 00:54:02,199 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/data/5275edbf7/7321d5f6b27946389590ee598974bba6/FLAG5c4751fea [2023-11-12 00:54:02,216 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/data/5275edbf7/7321d5f6b27946389590ee598974bba6 [2023-11-12 00:54:02,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:54:02,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:54:02,224 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:02,224 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:54:02,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:54:02,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:02" (1/1) ... [2023-11-12 00:54:02,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748e6ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:02, skipping insertion in model container [2023-11-12 00:54:02,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:02" (1/1) ... [2023-11-12 00:54:02,565 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:54:05,113 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_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[382357,382370] [2023-11-12 00:54:05,141 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_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[383339,383352] [2023-11-12 00:54:05,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:05,454 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:54:06,797 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_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[382357,382370] [2023-11-12 00:54:06,801 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_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.07.cil-1.c[383339,383352] [2023-11-12 00:54:06,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:06,928 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:54:06,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06 WrapperNode [2023-11-12 00:54:06,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:06,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:06,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:54:06,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:54:06,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:07,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:07,566 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12928 [2023-11-12 00:54:07,567 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:07,568 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:54:07,568 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:54:07,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:54:07,579 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:07,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:07,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:07,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:07,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:08,125 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:08,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:08,206 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:08,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:54:08,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:54:08,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:54:08,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:54:08,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (1/1) ... [2023-11-12 00:54:08,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:54:08,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:08,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:54:08,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:54:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:54:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:54:08,395 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:54:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:54:08,396 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:54:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:54:08,396 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:54:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:54:08,397 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:54:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:54:08,397 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:54:08,397 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:54:08,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:54:08,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:54:08,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:54:08,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:54:08,539 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:54:08,545 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:54:19,070 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:54:22,203 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:54:22,203 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-12 00:54:22,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:22 BoogieIcfgContainer [2023-11-12 00:54:22,210 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:54:22,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:54:22,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:54:22,218 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:54:22,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:54:02" (1/3) ... [2023-11-12 00:54:22,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed49014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:22, skipping insertion in model container [2023-11-12 00:54:22,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:06" (2/3) ... [2023-11-12 00:54:22,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed49014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:54:22, skipping insertion in model container [2023-11-12 00:54:22,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:54:22" (3/3) ... [2023-11-12 00:54:22,221 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.07.cil-1.c [2023-11-12 00:54:22,244 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:54:22,244 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:54:22,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:54:22,373 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;@66fbc5bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:54:22,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:54:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-12 00:54:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 00:54:22,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:22,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:22,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:22,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash -974871680, now seen corresponding path program 1 times [2023-11-12 00:54:22,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:22,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991514460] [2023-11-12 00:54:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:54:23,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:23,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991514460] [2023-11-12 00:54:23,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991514460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:23,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:23,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:54:23,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063668651] [2023-11-12 00:54:23,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:23,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:54:23,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:54:23,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:54:23,131 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:54:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:24,491 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2023-11-12 00:54:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:54:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-11-12 00:54:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:24,528 INFO L225 Difference]: With dead ends: 3692 [2023-11-12 00:54:24,529 INFO L226 Difference]: Without dead ends: 1907 [2023-11-12 00:54:24,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:54:24,551 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:24,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:54:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-11-12 00:54:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2023-11-12 00:54:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-12 00:54:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2023-11-12 00:54:24,759 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2023-11-12 00:54:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:24,760 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2023-11-12 00:54:24,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:54:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2023-11-12 00:54:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:54:24,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:24,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:24,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:54:24,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:24,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:24,777 INFO L85 PathProgramCache]: Analyzing trace with hash 207045448, now seen corresponding path program 1 times [2023-11-12 00:54:24,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335562046] [2023-11-12 00:54:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:24,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:54:25,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:25,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335562046] [2023-11-12 00:54:25,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335562046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:25,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140833638] [2023-11-12 00:54:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:25,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:25,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:25,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:25,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:54:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:25,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:54:25,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:54:25,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:54:25,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140833638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:25,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:54:25,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:54:25,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084947302] [2023-11-12 00:54:25,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:25,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:25,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:25,448 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:26,068 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2023-11-12 00:54:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-12 00:54:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:26,086 INFO L225 Difference]: With dead ends: 2419 [2023-11-12 00:54:26,087 INFO L226 Difference]: Without dead ends: 2159 [2023-11-12 00:54:26,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:26,091 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:26,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2023-11-12 00:54:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2023-11-12 00:54:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-12 00:54:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2023-11-12 00:54:26,180 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2023-11-12 00:54:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:26,180 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2023-11-12 00:54:26,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2023-11-12 00:54:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:54:26,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:26,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:26,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:26,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:26,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:26,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1377792058, now seen corresponding path program 1 times [2023-11-12 00:54:26,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:26,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630291376] [2023-11-12 00:54:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:54:26,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630291376] [2023-11-12 00:54:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630291376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119514521] [2023-11-12 00:54:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:26,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:26,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:26,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:54:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:26,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:54:26,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:54:26,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:54:26,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119514521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:26,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:54:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:54:26,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262950505] [2023-11-12 00:54:26,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:26,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:26,990 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:27,588 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2023-11-12 00:54:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-12 00:54:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:27,609 INFO L225 Difference]: With dead ends: 3160 [2023-11-12 00:54:27,610 INFO L226 Difference]: Without dead ends: 2651 [2023-11-12 00:54:27,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:27,615 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3421 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:27,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3421 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-11-12 00:54:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2023-11-12 00:54:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-12 00:54:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2023-11-12 00:54:27,735 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2023-11-12 00:54:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:27,736 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2023-11-12 00:54:27,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2023-11-12 00:54:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:54:27,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:27,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:27,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:27,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:27,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:27,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:27,950 INFO L85 PathProgramCache]: Analyzing trace with hash -696448376, now seen corresponding path program 1 times [2023-11-12 00:54:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271624512] [2023-11-12 00:54:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:27,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:54:28,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:28,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271624512] [2023-11-12 00:54:28,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271624512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845690186] [2023-11-12 00:54:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:28,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:28,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:28,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:28,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:54:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:28,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:54:28,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:54:28,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:54:28,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845690186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:28,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:54:28,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:54:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49017870] [2023-11-12 00:54:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:28,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:28,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:28,429 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:29,053 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2023-11-12 00:54:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:29,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-12 00:54:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:29,079 INFO L225 Difference]: With dead ends: 4618 [2023-11-12 00:54:29,079 INFO L226 Difference]: Without dead ends: 3619 [2023-11-12 00:54:29,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:29,085 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:29,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2023-11-12 00:54:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2023-11-12 00:54:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-12 00:54:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2023-11-12 00:54:29,268 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2023-11-12 00:54:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:29,269 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2023-11-12 00:54:29,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2023-11-12 00:54:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:54:29,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:29,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:29,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:29,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:29,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:29,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2048986502, now seen corresponding path program 1 times [2023-11-12 00:54:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:29,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834258116] [2023-11-12 00:54:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:29,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:54:29,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834258116] [2023-11-12 00:54:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834258116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:54:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285384459] [2023-11-12 00:54:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:29,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:54:29,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:54:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:29,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:54:29,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:54:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:54:29,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:54:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285384459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:29,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:54:29,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:54:30,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405219630] [2023-11-12 00:54:30,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:30,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:30,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:30,005 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:30,940 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2023-11-12 00:54:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-12 00:54:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:30,980 INFO L225 Difference]: With dead ends: 7486 [2023-11-12 00:54:30,981 INFO L226 Difference]: Without dead ends: 5523 [2023-11-12 00:54:30,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:54:30,991 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:30,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-11-12 00:54:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2023-11-12 00:54:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-12 00:54:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2023-11-12 00:54:31,263 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2023-11-12 00:54:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:31,263 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2023-11-12 00:54:31,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:54:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2023-11-12 00:54:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 00:54:31,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:31,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:31,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:54:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca63aff1-fec0-466c-8289-a7e50e5d5f5a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:54:31,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:31,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1647663356, now seen corresponding path program 1 times [2023-11-12 00:54:31,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:31,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806112777] [2023-11-12 00:54:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:31,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:54:31,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:31,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806112777] [2023-11-12 00:54:31,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806112777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:31,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:31,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:54:31,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441923592] [2023-11-12 00:54:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:31,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:31,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:31,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:31,620 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:54:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:32,450 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2023-11-12 00:54:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2023-11-12 00:54:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:32,512 INFO L225 Difference]: With dead ends: 8563 [2023-11-12 00:54:32,513 INFO L226 Difference]: Without dead ends: 6593 [2023-11-12 00:54:32,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:32,524 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:32,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:54:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-11-12 00:54:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2023-11-12 00:54:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-12 00:54:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2023-11-12 00:54:32,857 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2023-11-12 00:54:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:32,858 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2023-11-12 00:54:32,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:54:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2023-11-12 00:54:32,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-12 00:54:32,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:32,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:32,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:54:32,880 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:32,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:32,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1934126094, now seen corresponding path program 1 times [2023-11-12 00:54:32,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:32,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052899235] [2023-11-12 00:54:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:32,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 00:54:32,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052899235] [2023-11-12 00:54:32,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052899235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:32,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:32,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:54:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023853235] [2023-11-12 00:54:32,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:33,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:33,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:33,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:33,002 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:54:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:34,047 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2023-11-12 00:54:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-12 00:54:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:34,129 INFO L225 Difference]: With dead ends: 15382 [2023-11-12 00:54:34,129 INFO L226 Difference]: Without dead ends: 10755 [2023-11-12 00:54:34,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:34,150 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:34,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:54:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2023-11-12 00:54:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2023-11-12 00:54:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-12 00:54:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2023-11-12 00:54:34,693 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2023-11-12 00:54:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:34,693 INFO L495 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2023-11-12 00:54:34,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:54:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2023-11-12 00:54:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-12 00:54:34,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:34,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:34,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:54:34,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:34,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1273016549, now seen corresponding path program 1 times [2023-11-12 00:54:34,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:34,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96584850] [2023-11-12 00:54:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:34,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 00:54:34,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96584850] [2023-11-12 00:54:34,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96584850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:34,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:34,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:54:34,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771671831] [2023-11-12 00:54:34,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:34,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:34,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:34,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:34,880 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:54:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:36,381 INFO L93 Difference]: Finished difference Result 28534 states and 42036 transitions. [2023-11-12 00:54:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:36,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-12 00:54:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:36,490 INFO L225 Difference]: With dead ends: 28534 [2023-11-12 00:54:36,491 INFO L226 Difference]: Without dead ends: 19475 [2023-11-12 00:54:36,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:36,537 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3436 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:36,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2023-11-12 00:54:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 19377. [2023-11-12 00:54:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16683 states have (on average 1.4773721752682372) internal successors, (24647), 16749 states have internal predecessors, (24647), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-11-12 00:54:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 28367 transitions. [2023-11-12 00:54:38,032 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 28367 transitions. Word has length 138 [2023-11-12 00:54:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:54:38,034 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 28367 transitions. [2023-11-12 00:54:38,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:54:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 28367 transitions. [2023-11-12 00:54:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-12 00:54:38,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:54:38,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:54:38,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:54:38,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:54:38,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:54:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash -436786645, now seen corresponding path program 1 times [2023-11-12 00:54:38,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:54:38,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178837160] [2023-11-12 00:54:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:54:38,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:54:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:54:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 00:54:38,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:54:38,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178837160] [2023-11-12 00:54:38,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178837160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:54:38,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:54:38,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:54:38,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192765375] [2023-11-12 00:54:38,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:54:38,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:54:38,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:54:38,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:54:38,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:38,227 INFO L87 Difference]: Start difference. First operand 19377 states and 28367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:54:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:54:40,276 INFO L93 Difference]: Finished difference Result 54262 states and 78420 transitions. [2023-11-12 00:54:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:54:40,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-12 00:54:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:54:40,478 INFO L225 Difference]: With dead ends: 54262 [2023-11-12 00:54:40,479 INFO L226 Difference]: Without dead ends: 36531 [2023-11-12 00:54:40,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:54:40,672 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3439 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:54:40,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:54:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36531 states.