./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 416d3b74bdc0e830f927a3018e8747e6a310d2a238902dccf396a8065404f3af --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:57:00,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:57:00,966 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:57:00,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:57:00,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:57:01,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:57:01,001 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:57:01,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:57:01,002 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:57:01,002 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:57:01,003 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:57:01,004 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:57:01,004 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:57:01,005 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:57:01,005 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:57:01,006 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:57:01,006 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:57:01,007 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:57:01,007 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:57:01,008 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:57:01,008 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:57:01,011 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:57:01,012 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:57:01,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:57:01,013 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:57:01,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:57:01,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:57:01,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:57:01,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:57:01,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:57:01,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:57:01,016 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:57:01,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:57:01,016 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:57:01,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:57:01,017 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:57:01,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:57:01,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:57:01,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:57:01,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:57:01,018 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:57:01,018 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:57:01,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:57:01,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:57:01,019 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:57:01,019 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:57:01,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:57:01,019 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_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 416d3b74bdc0e830f927a3018e8747e6a310d2a238902dccf396a8065404f3af [2023-12-02 17:57:01,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:57:01,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:57:01,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:57:01,276 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:57:01,276 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:57:01,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c [2023-12-02 17:57:04,125 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:57:04,702 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:57:04,702 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c [2023-12-02 17:57:04,748 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/data/179a470c2/205c28414662445585fd299384079feb/FLAG0f0f89613 [2023-12-02 17:57:04,766 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/data/179a470c2/205c28414662445585fd299384079feb [2023-12-02 17:57:04,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:57:04,771 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:57:04,772 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:57:04,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:57:04,778 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:57:04,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:57:04" (1/1) ... [2023-12-02 17:57:04,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7120f0c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:04, skipping insertion in model container [2023-12-02 17:57:04,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:57:04" (1/1) ... [2023-12-02 17:57:05,036 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:57:07,030 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_91a62e1d-a77a-494d-835f-724f2f7a34d8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c[378560,378573] [2023-12-02 17:57:07,059 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_91a62e1d-a77a-494d-835f-724f2f7a34d8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c[383339,383352] [2023-12-02 17:57:07,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:57:07,254 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:57:08,382 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_91a62e1d-a77a-494d-835f-724f2f7a34d8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c[378560,378573] [2023-12-02 17:57:08,390 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_91a62e1d-a77a-494d-835f-724f2f7a34d8/sv-benchmarks/c/combinations/Problem05_label42+token_ring.03.cil-2.c[383339,383352] [2023-12-02 17:57:08,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:57:08,505 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:57:08,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08 WrapperNode [2023-12-02 17:57:08,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:57:08,507 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:57:08,507 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:57:08,508 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:57:08,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:08,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,033 INFO L138 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12688 [2023-12-02 17:57:09,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:57:09,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:57:09,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:57:09,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:57:09,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,317 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,442 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:57:09,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:57:09,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:57:09,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:57:09,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (1/1) ... [2023-12-02 17:57:09,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:57:09,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:09,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:57:09,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:57:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:57:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 17:57:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 17:57:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 17:57:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 17:57:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 17:57:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 17:57:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 17:57:09,578 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 17:57:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 17:57:09,578 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 17:57:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 17:57:09,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 17:57:09,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:57:09,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:57:09,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:57:09,702 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:57:09,705 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:57:18,403 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:57:20,385 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:57:20,385 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 17:57:20,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:57:20 BoogieIcfgContainer [2023-12-02 17:57:20,388 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:57:20,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:57:20,392 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:57:20,395 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:57:20,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:57:04" (1/3) ... [2023-12-02 17:57:20,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e30392d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:57:20, skipping insertion in model container [2023-12-02 17:57:20,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:57:08" (2/3) ... [2023-12-02 17:57:20,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e30392d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:57:20, skipping insertion in model container [2023-12-02 17:57:20,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:57:20" (3/3) ... [2023-12-02 17:57:20,398 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.03.cil-2.c [2023-12-02 17:57:20,420 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:57:20,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 17:57:20,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:57:20,525 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;@7055e0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:57:20,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 17:57:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 1736 states, 1710 states have (on average 1.972514619883041) internal successors, (3373), 1713 states have internal predecessors, (3373), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 17:57:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 17:57:20,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:20,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:20,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:20,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash 751354514, now seen corresponding path program 1 times [2023-12-02 17:57:20,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:20,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379738550] [2023-12-02 17:57:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:57:20,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:20,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379738550] [2023-12-02 17:57:20,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379738550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:20,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:57:20,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:57:20,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296883774] [2023-12-02 17:57:20,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:20,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:57:20,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:57:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:57:21,006 INFO L87 Difference]: Start difference. First operand has 1736 states, 1710 states have (on average 1.972514619883041) internal successors, (3373), 1713 states have internal predecessors, (3373), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:57:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:21,953 INFO L93 Difference]: Finished difference Result 3548 states and 6935 transitions. [2023-12-02 17:57:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:57:21,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-12-02 17:57:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:21,986 INFO L225 Difference]: With dead ends: 3548 [2023-12-02 17:57:21,986 INFO L226 Difference]: Without dead ends: 1811 [2023-12-02 17:57:21,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:57:22,001 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 3490 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:22,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 6436 Invalid, 596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:57:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2023-12-02 17:57:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1810. [2023-12-02 17:57:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1766 states have (on average 1.9479048697621744) internal successors, (3440), 1769 states have internal predecessors, (3440), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-02 17:57:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3500 transitions. [2023-12-02 17:57:22,144 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3500 transitions. Word has length 40 [2023-12-02 17:57:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:22,144 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 3500 transitions. [2023-12-02 17:57:22,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:57:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3500 transitions. [2023-12-02 17:57:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:57:22,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:22,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:22,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:57:22,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:22,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:22,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1942729003, now seen corresponding path program 1 times [2023-12-02 17:57:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:22,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449920096] [2023-12-02 17:57:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:22,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:57:22,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:22,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449920096] [2023-12-02 17:57:22,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449920096] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:22,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963184732] [2023-12-02 17:57:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:22,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:22,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:22,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:22,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:57:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:22,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:57:22,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:57:22,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963184732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:22,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:22,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:57:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877006849] [2023-12-02 17:57:22,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:22,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:22,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:22,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:22,585 INFO L87 Difference]: Start difference. First operand 1810 states and 3500 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:57:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:23,085 INFO L93 Difference]: Finished difference Result 2131 states and 3949 transitions. [2023-12-02 17:57:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2023-12-02 17:57:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:23,104 INFO L225 Difference]: With dead ends: 2131 [2023-12-02 17:57:23,104 INFO L226 Difference]: Without dead ends: 1967 [2023-12-02 17:57:23,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:23,108 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 3367 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3367 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:23,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3367 Valid, 3287 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:57:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2023-12-02 17:57:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1963. [2023-12-02 17:57:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1883 states have (on average 1.910249601699416) internal successors, (3597), 1887 states have internal predecessors, (3597), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-12-02 17:57:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 3705 transitions. [2023-12-02 17:57:23,193 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 3705 transitions. Word has length 74 [2023-12-02 17:57:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:23,194 INFO L495 AbstractCegarLoop]: Abstraction has 1963 states and 3705 transitions. [2023-12-02 17:57:23,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:57:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 3705 transitions. [2023-12-02 17:57:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:57:23,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:23,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:23,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:57:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:23,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:23,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash 455135273, now seen corresponding path program 1 times [2023-12-02 17:57:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:23,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922576112] [2023-12-02 17:57:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:23,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:57:23,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:23,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922576112] [2023-12-02 17:57:23,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922576112] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:23,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882893588] [2023-12-02 17:57:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:23,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:23,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:23,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:23,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:57:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:23,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:57:23,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:57:23,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:23,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882893588] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:23,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:23,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 17:57:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138598105] [2023-12-02 17:57:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:23,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:23,753 INFO L87 Difference]: Start difference. First operand 1963 states and 3705 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:57:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:24,274 INFO L93 Difference]: Finished difference Result 2584 states and 4564 transitions. [2023-12-02 17:57:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:24,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2023-12-02 17:57:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:24,293 INFO L225 Difference]: With dead ends: 2584 [2023-12-02 17:57:24,293 INFO L226 Difference]: Without dead ends: 2267 [2023-12-02 17:57:24,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:24,297 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 3370 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3370 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:24,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3370 Valid, 3252 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:57:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2023-12-02 17:57:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2261. [2023-12-02 17:57:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2111 states have (on average 1.8469919469445761) internal successors, (3899), 2117 states have internal predecessors, (3899), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2023-12-02 17:57:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 4099 transitions. [2023-12-02 17:57:24,398 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 4099 transitions. Word has length 74 [2023-12-02 17:57:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:24,398 INFO L495 AbstractCegarLoop]: Abstraction has 2261 states and 4099 transitions. [2023-12-02 17:57:24,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:57:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 4099 transitions. [2023-12-02 17:57:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 17:57:24,402 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:24,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:24,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:57:24,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:24,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:24,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash -977115029, now seen corresponding path program 1 times [2023-12-02 17:57:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:24,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308419693] [2023-12-02 17:57:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:57:24,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308419693] [2023-12-02 17:57:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308419693] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:24,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:57:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:57:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822768765] [2023-12-02 17:57:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:24,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:57:24,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:57:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:24,987 INFO L87 Difference]: Start difference. First operand 2261 states and 4099 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 17:57:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:25,989 INFO L93 Difference]: Finished difference Result 3537 states and 5805 transitions. [2023-12-02 17:57:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:57:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2023-12-02 17:57:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:26,013 INFO L225 Difference]: With dead ends: 3537 [2023-12-02 17:57:26,013 INFO L226 Difference]: Without dead ends: 2923 [2023-12-02 17:57:26,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:57:26,018 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3555 mSDsluCounter, 6284 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3567 SdHoareTripleChecker+Valid, 9460 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:26,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3567 Valid, 9460 Invalid, 868 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [65 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:57:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2023-12-02 17:57:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2825. [2023-12-02 17:57:26,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2539 states have (on average 1.7546278062229224) internal successors, (4455), 2549 states have internal predecessors, (4455), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2023-12-02 17:57:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4831 transitions. [2023-12-02 17:57:26,225 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4831 transitions. Word has length 74 [2023-12-02 17:57:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:26,226 INFO L495 AbstractCegarLoop]: Abstraction has 2825 states and 4831 transitions. [2023-12-02 17:57:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 17:57:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4831 transitions. [2023-12-02 17:57:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 17:57:26,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:26,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:57:26,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:26,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash 951480974, now seen corresponding path program 1 times [2023-12-02 17:57:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:26,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521336265] [2023-12-02 17:57:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:57:26,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521336265] [2023-12-02 17:57:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521336265] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479256377] [2023-12-02 17:57:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:26,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:26,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:26,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:26,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:57:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:26,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:57:26,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:57:26,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:26,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479256377] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:26,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:26,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:57:26,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960517941] [2023-12-02 17:57:26,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:26,634 INFO L87 Difference]: Start difference. First operand 2825 states and 4831 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 17:57:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:27,273 INFO L93 Difference]: Finished difference Result 3750 states and 6074 transitions. [2023-12-02 17:57:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2023-12-02 17:57:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:27,294 INFO L225 Difference]: With dead ends: 3750 [2023-12-02 17:57:27,295 INFO L226 Difference]: Without dead ends: 3140 [2023-12-02 17:57:27,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:27,299 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 47 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6372 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:27,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6372 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:57:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2023-12-02 17:57:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3009. [2023-12-02 17:57:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 2707 states have (on average 1.7373476172885112) internal successors, (4703), 2717 states have internal predecessors, (4703), 196 states have call successors, (196), 104 states have call predecessors, (196), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2023-12-02 17:57:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 5095 transitions. [2023-12-02 17:57:27,432 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 5095 transitions. Word has length 88 [2023-12-02 17:57:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:27,433 INFO L495 AbstractCegarLoop]: Abstraction has 3009 states and 5095 transitions. [2023-12-02 17:57:27,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 17:57:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 5095 transitions. [2023-12-02 17:57:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 17:57:27,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:27,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:27,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:57:27,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:27,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:27,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1326791186, now seen corresponding path program 1 times [2023-12-02 17:57:27,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:27,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686826210] [2023-12-02 17:57:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:27,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 17:57:27,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686826210] [2023-12-02 17:57:27,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686826210] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:27,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:57:27,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:57:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932766933] [2023-12-02 17:57:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:57:27,726 INFO L87 Difference]: Start difference. First operand 3009 states and 5095 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:57:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:28,307 INFO L93 Difference]: Finished difference Result 5050 states and 7848 transitions. [2023-12-02 17:57:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 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 98 [2023-12-02 17:57:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:28,328 INFO L225 Difference]: With dead ends: 5050 [2023-12-02 17:57:28,329 INFO L226 Difference]: Without dead ends: 3687 [2023-12-02 17:57:28,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:57:28,335 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 3362 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:28,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3362 Valid, 3287 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:57:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2023-12-02 17:57:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3673. [2023-12-02 17:57:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3227 states have (on average 1.666873256894949) internal successors, (5379), 3241 states have internal predecessors, (5379), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2023-12-02 17:57:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 5955 transitions. [2023-12-02 17:57:28,497 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 5955 transitions. Word has length 98 [2023-12-02 17:57:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:28,498 INFO L495 AbstractCegarLoop]: Abstraction has 3673 states and 5955 transitions. [2023-12-02 17:57:28,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:57:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 5955 transitions. [2023-12-02 17:57:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 17:57:28,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:28,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:28,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:57:28,507 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:28,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1048859573, now seen corresponding path program 1 times [2023-12-02 17:57:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:28,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739866436] [2023-12-02 17:57:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 17:57:28,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:28,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739866436] [2023-12-02 17:57:28,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739866436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887475535] [2023-12-02 17:57:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:28,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:28,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:28,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:28,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:57:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:28,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:57:28,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:57:28,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887475535] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:28,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:28,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:57:28,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071768423] [2023-12-02 17:57:28,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:28,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:28,835 INFO L87 Difference]: Start difference. First operand 3673 states and 5955 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:57:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:29,442 INFO L93 Difference]: Finished difference Result 5469 states and 8385 transitions. [2023-12-02 17:57:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:29,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2023-12-02 17:57:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:29,470 INFO L225 Difference]: With dead ends: 5469 [2023-12-02 17:57:29,470 INFO L226 Difference]: Without dead ends: 4107 [2023-12-02 17:57:29,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:29,477 INFO L413 NwaCegarLoop]: 3206 mSDtfsCounter, 56 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6368 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:29,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 6368 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:57:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2023-12-02 17:57:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3917. [2023-12-02 17:57:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3447 states have (on average 1.656803017116333) internal successors, (5711), 3461 states have internal predecessors, (5711), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2023-12-02 17:57:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 6311 transitions. [2023-12-02 17:57:29,666 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 6311 transitions. Word has length 112 [2023-12-02 17:57:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:29,667 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 6311 transitions. [2023-12-02 17:57:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:57:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 6311 transitions. [2023-12-02 17:57:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 17:57:29,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:29,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:29,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 17:57:29,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:29,882 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:29,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash 463850293, now seen corresponding path program 2 times [2023-12-02 17:57:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:29,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238853019] [2023-12-02 17:57:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:57:30,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238853019] [2023-12-02 17:57:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238853019] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495838715] [2023-12-02 17:57:30,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:57:30,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:30,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:30,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:57:30,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:57:30,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:57:30,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:57:30,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:57:30,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:30,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495838715] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:30,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:30,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:57:30,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625054070] [2023-12-02 17:57:30,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:30,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:30,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:30,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:30,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:30,289 INFO L87 Difference]: Start difference. First operand 3917 states and 6311 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:57:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:30,894 INFO L93 Difference]: Finished difference Result 5533 states and 8581 transitions. [2023-12-02 17:57:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 112 [2023-12-02 17:57:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:30,921 INFO L225 Difference]: With dead ends: 5533 [2023-12-02 17:57:30,921 INFO L226 Difference]: Without dead ends: 3927 [2023-12-02 17:57:30,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:30,929 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 106 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6365 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:30,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 6365 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:57:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2023-12-02 17:57:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3909. [2023-12-02 17:57:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3439 states have (on average 1.6466996219831347) internal successors, (5663), 3453 states have internal predecessors, (5663), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2023-12-02 17:57:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 6263 transitions. [2023-12-02 17:57:31,196 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 6263 transitions. Word has length 112 [2023-12-02 17:57:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:31,197 INFO L495 AbstractCegarLoop]: Abstraction has 3909 states and 6263 transitions. [2023-12-02 17:57:31,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:57:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 6263 transitions. [2023-12-02 17:57:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 17:57:31,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:31,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:31,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:57:31,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:31,409 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:31,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1332723733, now seen corresponding path program 1 times [2023-12-02 17:57:31,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:31,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70356594] [2023-12-02 17:57:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:57:31,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70356594] [2023-12-02 17:57:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70356594] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929827170] [2023-12-02 17:57:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:31,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:31,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:31,632 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:31,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:57:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:31,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:57:31,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:57:31,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929827170] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:31,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:31,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:57:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221450800] [2023-12-02 17:57:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:31,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:31,820 INFO L87 Difference]: Start difference. First operand 3909 states and 6263 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:57:32,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:32,301 INFO L93 Difference]: Finished difference Result 5871 states and 8842 transitions. [2023-12-02 17:57:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:32,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 112 [2023-12-02 17:57:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:32,319 INFO L225 Difference]: With dead ends: 5871 [2023-12-02 17:57:32,320 INFO L226 Difference]: Without dead ends: 4357 [2023-12-02 17:57:32,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:32,328 INFO L413 NwaCegarLoop]: 3171 mSDtfsCounter, 3372 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3372 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:32,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3372 Valid, 3195 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:57:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2023-12-02 17:57:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4357. [2023-12-02 17:57:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4357 states, 3823 states have (on average 1.597436568140204) internal successors, (6107), 3837 states have internal predecessors, (6107), 320 states have call successors, (320), 212 states have call predecessors, (320), 212 states have return successors, (320), 308 states have call predecessors, (320), 320 states have call successors, (320) [2023-12-02 17:57:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4357 states to 4357 states and 6747 transitions. [2023-12-02 17:57:32,553 INFO L78 Accepts]: Start accepts. Automaton has 4357 states and 6747 transitions. Word has length 112 [2023-12-02 17:57:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:32,554 INFO L495 AbstractCegarLoop]: Abstraction has 4357 states and 6747 transitions. [2023-12-02 17:57:32,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:57:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4357 states and 6747 transitions. [2023-12-02 17:57:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 17:57:32,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:32,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:32,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 17:57:32,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:32,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:32,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash -926238852, now seen corresponding path program 1 times [2023-12-02 17:57:32,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:32,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3729647] [2023-12-02 17:57:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:32,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:57:32,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:32,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3729647] [2023-12-02 17:57:32,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3729647] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:32,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264522117] [2023-12-02 17:57:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:32,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:32,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:32,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:32,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:57:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:33,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:57:33,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:57:33,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264522117] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:33,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:33,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 17:57:33,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753672413] [2023-12-02 17:57:33,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:33,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:33,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:33,168 INFO L87 Difference]: Start difference. First operand 4357 states and 6747 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:57:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:33,852 INFO L93 Difference]: Finished difference Result 8123 states and 11672 transitions. [2023-12-02 17:57:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2023-12-02 17:57:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:33,871 INFO L225 Difference]: With dead ends: 8123 [2023-12-02 17:57:33,872 INFO L226 Difference]: Without dead ends: 5413 [2023-12-02 17:57:33,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:57:33,882 INFO L413 NwaCegarLoop]: 3174 mSDtfsCounter, 52 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6323 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:33,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6323 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:57:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2023-12-02 17:57:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 4697. [2023-12-02 17:57:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4127 states have (on average 1.5873515871092803) internal successors, (6551), 4142 states have internal predecessors, (6551), 338 states have call successors, (338), 230 states have call predecessors, (338), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2023-12-02 17:57:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7227 transitions. [2023-12-02 17:57:34,122 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7227 transitions. Word has length 113 [2023-12-02 17:57:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:34,122 INFO L495 AbstractCegarLoop]: Abstraction has 4697 states and 7227 transitions. [2023-12-02 17:57:34,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:57:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7227 transitions. [2023-12-02 17:57:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 17:57:34,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:34,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:34,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:57:34,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:57:34,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:34,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1312893907, now seen corresponding path program 1 times [2023-12-02 17:57:34,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70298989] [2023-12-02 17:57:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:57:34,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70298989] [2023-12-02 17:57:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70298989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59752829] [2023-12-02 17:57:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:34,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:34,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:34,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:57:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:34,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:57:34,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:57:34,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:34,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59752829] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:34,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:34,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 17:57:34,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054854780] [2023-12-02 17:57:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:34,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:57:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:57:34,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:57:34,784 INFO L87 Difference]: Start difference. First operand 4697 states and 7227 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:57:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:35,871 INFO L93 Difference]: Finished difference Result 9151 states and 12967 transitions. [2023-12-02 17:57:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:57:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 115 [2023-12-02 17:57:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:35,886 INFO L225 Difference]: With dead ends: 9151 [2023-12-02 17:57:35,886 INFO L226 Difference]: Without dead ends: 6101 [2023-12-02 17:57:35,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:57:35,893 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3539 mSDsluCounter, 6292 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 9451 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:35,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3551 Valid, 9451 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:57:35,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2023-12-02 17:57:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 6099. [2023-12-02 17:57:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 5259 states have (on average 1.5137858908537745) internal successors, (7961), 5280 states have internal predecessors, (7961), 496 states have call successors, (496), 342 states have call predecessors, (496), 342 states have return successors, (496), 477 states have call predecessors, (496), 496 states have call successors, (496) [2023-12-02 17:57:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 8953 transitions. [2023-12-02 17:57:36,112 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 8953 transitions. Word has length 115 [2023-12-02 17:57:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:36,112 INFO L495 AbstractCegarLoop]: Abstraction has 6099 states and 8953 transitions. [2023-12-02 17:57:36,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 17:57:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 8953 transitions. [2023-12-02 17:57:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 17:57:36,121 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:36,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:36,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 17:57:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 17:57:36,322 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:36,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -100398081, now seen corresponding path program 1 times [2023-12-02 17:57:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980366071] [2023-12-02 17:57:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:57:36,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:36,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980366071] [2023-12-02 17:57:36,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980366071] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:36,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326442249] [2023-12-02 17:57:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:36,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:36,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:57:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:36,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:57:36,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:57:36,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:57:36,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326442249] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:57:36,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:57:36,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:57:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526692164] [2023-12-02 17:57:36,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:57:36,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:57:36,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:57:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:57:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:36,567 INFO L87 Difference]: Start difference. First operand 6099 states and 8953 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:57:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:57:37,277 INFO L93 Difference]: Finished difference Result 10109 states and 14173 transitions. [2023-12-02 17:57:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:57:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 116 [2023-12-02 17:57:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:57:37,300 INFO L225 Difference]: With dead ends: 10109 [2023-12-02 17:57:37,300 INFO L226 Difference]: Without dead ends: 7139 [2023-12-02 17:57:37,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:57:37,310 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 59 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6376 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:57:37,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6376 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:57:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2023-12-02 17:57:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 6651. [2023-12-02 17:57:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6651 states, 5747 states have (on average 1.5049591091004002) internal successors, (8649), 5768 states have internal predecessors, (8649), 528 states have call successors, (528), 374 states have call predecessors, (528), 374 states have return successors, (528), 509 states have call predecessors, (528), 528 states have call successors, (528) [2023-12-02 17:57:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6651 states to 6651 states and 9705 transitions. [2023-12-02 17:57:37,667 INFO L78 Accepts]: Start accepts. Automaton has 6651 states and 9705 transitions. Word has length 116 [2023-12-02 17:57:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:57:37,667 INFO L495 AbstractCegarLoop]: Abstraction has 6651 states and 9705 transitions. [2023-12-02 17:57:37,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:57:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6651 states and 9705 transitions. [2023-12-02 17:57:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 17:57:37,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:57:37,685 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:57:37,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:57:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 17:57:37,887 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:57:37,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:57:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2069975690, now seen corresponding path program 1 times [2023-12-02 17:57:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:57:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924634571] [2023-12-02 17:57:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:37,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:57:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 17:57:38,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:57:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924634571] [2023-12-02 17:57:38,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924634571] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:57:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81017710] [2023-12-02 17:57:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:57:38,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:57:38,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:57:38,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:57:38,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:57:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:57:38,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 17:57:38,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:57:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:57:38,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:57:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 17:57:39,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81017710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:57:39,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033262093] [2023-12-02 17:57:39,123 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-12-02 17:57:39,123 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:57:39,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:57:39,134 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:57:39,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:57:47,896 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 67 for LOIs [2023-12-02 17:57:47,924 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 149 for LOIs [2023-12-02 17:57:48,092 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 67 for LOIs [2023-12-02 17:57:48,099 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 67 for LOIs [2023-12-02 17:57:48,137 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 94 for LOIs [2023-12-02 17:57:48,346 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 67 for LOIs [2023-12-02 17:57:49,261 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:58:02,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '132792#(and (= ~a15~0 1) (= 5 ~a20~0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 (+ ~local~0 2147483648)) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~a27~0 1) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10))' at error location [2023-12-02 17:58:02,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:58:02,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:58:02,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 16 [2023-12-02 17:58:02,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030292604] [2023-12-02 17:58:02,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:58:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:58:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:02,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:58:02,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3823, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 17:58:02,328 INFO L87 Difference]: Start difference. First operand 6651 states and 9705 transitions. Second operand has 16 states, 14 states have (on average 10.428571428571429) internal successors, (146), 14 states have internal predecessors, (146), 8 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-12-02 17:58:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:07,841 INFO L93 Difference]: Finished difference Result 17067 states and 23512 transitions. [2023-12-02 17:58:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-12-02 17:58:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 10.428571428571429) internal successors, (146), 14 states have internal predecessors, (146), 8 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) Word has length 122 [2023-12-02 17:58:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:07,867 INFO L225 Difference]: With dead ends: 17067 [2023-12-02 17:58:07,867 INFO L226 Difference]: Without dead ends: 12063 [2023-12-02 17:58:07,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 361 SyntacticMatches, 10 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14175 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=2915, Invalid=30027, Unknown=0, NotChecked=0, Total=32942 [2023-12-02 17:58:07,888 INFO L413 NwaCegarLoop]: 3422 mSDtfsCounter, 10909 mSDsluCounter, 27185 mSDsCounter, 0 mSdLazyCounter, 4083 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10915 SdHoareTripleChecker+Valid, 30607 SdHoareTripleChecker+Invalid, 4382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 4083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:07,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10915 Valid, 30607 Invalid, 4382 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [299 Valid, 4083 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:58:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12063 states. [2023-12-02 17:58:08,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12063 to 9136. [2023-12-02 17:58:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 7964 states have (on average 1.420894023103968) internal successors, (11316), 7991 states have internal predecessors, (11316), 633 states have call successors, (633), 537 states have call predecessors, (633), 537 states have return successors, (633), 608 states have call predecessors, (633), 633 states have call successors, (633) [2023-12-02 17:58:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 12582 transitions. [2023-12-02 17:58:08,580 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 12582 transitions. Word has length 122 [2023-12-02 17:58:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:08,580 INFO L495 AbstractCegarLoop]: Abstraction has 9136 states and 12582 transitions. [2023-12-02 17:58:08,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 10.428571428571429) internal successors, (146), 14 states have internal predecessors, (146), 8 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-12-02 17:58:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 12582 transitions. [2023-12-02 17:58:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 17:58:08,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:08,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:08,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 17:58:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 17:58:08,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:08,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1498387408, now seen corresponding path program 1 times [2023-12-02 17:58:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:08,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302802146] [2023-12-02 17:58:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:08,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:58:08,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302802146] [2023-12-02 17:58:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302802146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880416959] [2023-12-02 17:58:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:08,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:08,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:08,918 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:08,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:58:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:09,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:58:09,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:58:09,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:58:09,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880416959] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:58:09,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:58:09,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 17:58:09,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915336309] [2023-12-02 17:58:09,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:09,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:58:09,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:09,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:58:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:58:09,115 INFO L87 Difference]: Start difference. First operand 9136 states and 12582 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:58:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:09,969 INFO L93 Difference]: Finished difference Result 15494 states and 20661 transitions. [2023-12-02 17:58:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:58:09,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2023-12-02 17:58:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:09,999 INFO L225 Difference]: With dead ends: 15494 [2023-12-02 17:58:09,999 INFO L226 Difference]: Without dead ends: 10132 [2023-12-02 17:58:10,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:58:10,013 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 65 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 6386 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:10,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 6386 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:58:10,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2023-12-02 17:58:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 9585. [2023-12-02 17:58:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9585 states, 8330 states have (on average 1.4115246098439376) internal successors, (11758), 8353 states have internal predecessors, (11758), 674 states have call successors, (674), 579 states have call predecessors, (674), 579 states have return successors, (674), 653 states have call predecessors, (674), 674 states have call successors, (674) [2023-12-02 17:58:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9585 states to 9585 states and 13106 transitions. [2023-12-02 17:58:10,656 INFO L78 Accepts]: Start accepts. Automaton has 9585 states and 13106 transitions. Word has length 121 [2023-12-02 17:58:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:10,656 INFO L495 AbstractCegarLoop]: Abstraction has 9585 states and 13106 transitions. [2023-12-02 17:58:10,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:58:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9585 states and 13106 transitions. [2023-12-02 17:58:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:58:10,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:10,666 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:10,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 17:58:10,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:58:10,867 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:10,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 652278079, now seen corresponding path program 1 times [2023-12-02 17:58:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:10,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715752611] [2023-12-02 17:58:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:58:11,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:11,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715752611] [2023-12-02 17:58:11,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715752611] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:11,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952019229] [2023-12-02 17:58:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:11,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:11,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:11,022 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:11,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:58:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:11,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:58:11,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:58:11,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:58:11,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952019229] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:58:11,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:58:11,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 17:58:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333624959] [2023-12-02 17:58:11,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:11,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:58:11,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:58:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:58:11,208 INFO L87 Difference]: Start difference. First operand 9585 states and 13106 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:58:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:12,041 INFO L93 Difference]: Finished difference Result 13384 states and 17841 transitions. [2023-12-02 17:58:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:58:12,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2023-12-02 17:58:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:12,066 INFO L225 Difference]: With dead ends: 13384 [2023-12-02 17:58:12,067 INFO L226 Difference]: Without dead ends: 9874 [2023-12-02 17:58:12,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:58:12,077 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3336 mSDsluCounter, 3301 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3336 SdHoareTripleChecker+Valid, 6506 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:12,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3336 Valid, 6506 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:58:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2023-12-02 17:58:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 9789. [2023-12-02 17:58:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9789 states, 8498 states have (on average 1.4090374205695457) internal successors, (11974), 8539 states have internal predecessors, (11974), 674 states have call successors, (674), 579 states have call predecessors, (674), 615 states have return successors, (710), 671 states have call predecessors, (710), 674 states have call successors, (710) [2023-12-02 17:58:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9789 states to 9789 states and 13358 transitions. [2023-12-02 17:58:12,678 INFO L78 Accepts]: Start accepts. Automaton has 9789 states and 13358 transitions. Word has length 123 [2023-12-02 17:58:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:12,679 INFO L495 AbstractCegarLoop]: Abstraction has 9789 states and 13358 transitions. [2023-12-02 17:58:12,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:58:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9789 states and 13358 transitions. [2023-12-02 17:58:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 17:58:12,692 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:12,692 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:12,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:58:12,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 17:58:12,893 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:12,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:12,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1818626970, now seen corresponding path program 1 times [2023-12-02 17:58:12,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:12,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161155107] [2023-12-02 17:58:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:12,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 17:58:12,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161155107] [2023-12-02 17:58:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161155107] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689051252] [2023-12-02 17:58:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:12,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:12,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:12,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:12,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:58:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:13,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:58:13,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 17:58:13,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:58:13,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689051252] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:58:13,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:58:13,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 17:58:13,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112839367] [2023-12-02 17:58:13,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:13,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:58:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:13,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:58:13,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:58:13,144 INFO L87 Difference]: Start difference. First operand 9789 states and 13358 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:14,063 INFO L93 Difference]: Finished difference Result 13356 states and 17863 transitions. [2023-12-02 17:58:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:58:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2023-12-02 17:58:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:14,081 INFO L225 Difference]: With dead ends: 13356 [2023-12-02 17:58:14,081 INFO L226 Difference]: Without dead ends: 9522 [2023-12-02 17:58:14,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:58:14,092 INFO L413 NwaCegarLoop]: 3172 mSDtfsCounter, 22 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6328 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:14,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6328 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:58:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2023-12-02 17:58:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 9111. [2023-12-02 17:58:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 7928 states have (on average 1.4195257315842584) internal successors, (11254), 7942 states have internal predecessors, (11254), 638 states have call successors, (638), 543 states have call predecessors, (638), 543 states have return successors, (638), 626 states have call predecessors, (638), 638 states have call successors, (638) [2023-12-02 17:58:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 12530 transitions. [2023-12-02 17:58:14,830 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 12530 transitions. Word has length 124 [2023-12-02 17:58:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:14,831 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 12530 transitions. [2023-12-02 17:58:14,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 12530 transitions. [2023-12-02 17:58:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 17:58:14,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:14,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:14,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:58:15,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:15,047 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:15,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1158971461, now seen corresponding path program 1 times [2023-12-02 17:58:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:15,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880969858] [2023-12-02 17:58:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:58:15,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:15,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880969858] [2023-12-02 17:58:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880969858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:15,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576622926] [2023-12-02 17:58:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:15,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:15,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:15,200 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:15,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:58:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:15,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:58:15,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:58:15,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:58:15,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576622926] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:58:15,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:58:15,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 17:58:15,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761546812] [2023-12-02 17:58:15,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:15,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:58:15,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:58:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:58:15,410 INFO L87 Difference]: Start difference. First operand 9111 states and 12530 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:16,112 INFO L93 Difference]: Finished difference Result 14913 states and 19886 transitions. [2023-12-02 17:58:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:58:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 125 [2023-12-02 17:58:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:16,125 INFO L225 Difference]: With dead ends: 14913 [2023-12-02 17:58:16,126 INFO L226 Difference]: Without dead ends: 9611 [2023-12-02 17:58:16,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:58:16,136 INFO L413 NwaCegarLoop]: 3178 mSDtfsCounter, 3343 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:16,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 3209 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:58:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2023-12-02 17:58:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9548. [2023-12-02 17:58:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9548 states, 8319 states have (on average 1.404014905637697) internal successors, (11680), 8333 states have internal predecessors, (11680), 649 states have call successors, (649), 578 states have call predecessors, (649), 578 states have return successors, (679), 637 states have call predecessors, (679), 649 states have call successors, (679) [2023-12-02 17:58:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9548 states to 9548 states and 13008 transitions. [2023-12-02 17:58:16,609 INFO L78 Accepts]: Start accepts. Automaton has 9548 states and 13008 transitions. Word has length 125 [2023-12-02 17:58:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:16,610 INFO L495 AbstractCegarLoop]: Abstraction has 9548 states and 13008 transitions. [2023-12-02 17:58:16,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 9548 states and 13008 transitions. [2023-12-02 17:58:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 17:58:16,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:16,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:16,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 17:58:16,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:16,825 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:16,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -922646137, now seen corresponding path program 1 times [2023-12-02 17:58:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:16,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304347396] [2023-12-02 17:58:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:58:16,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304347396] [2023-12-02 17:58:16,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304347396] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400307042] [2023-12-02 17:58:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:16,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:16,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:16,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:58:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:16,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:58:17,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:58:17,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:58:17,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400307042] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:58:17,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:58:17,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 17:58:17,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27120956] [2023-12-02 17:58:17,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:17,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:58:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:58:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:58:17,028 INFO L87 Difference]: Start difference. First operand 9548 states and 13008 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:58:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:17,892 INFO L93 Difference]: Finished difference Result 15169 states and 20163 transitions. [2023-12-02 17:58:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:58:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2023-12-02 17:58:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:17,906 INFO L225 Difference]: With dead ends: 15169 [2023-12-02 17:58:17,906 INFO L226 Difference]: Without dead ends: 9545 [2023-12-02 17:58:17,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:58:17,915 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 89 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6395 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:17,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6395 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:58:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2023-12-02 17:58:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 9415. [2023-12-02 17:58:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9415 states, 8186 states have (on average 1.3840703640361594) internal successors, (11330), 8200 states have internal predecessors, (11330), 649 states have call successors, (649), 578 states have call predecessors, (649), 578 states have return successors, (679), 637 states have call predecessors, (679), 649 states have call successors, (679) [2023-12-02 17:58:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9415 states to 9415 states and 12658 transitions. [2023-12-02 17:58:18,482 INFO L78 Accepts]: Start accepts. Automaton has 9415 states and 12658 transitions. Word has length 125 [2023-12-02 17:58:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:18,482 INFO L495 AbstractCegarLoop]: Abstraction has 9415 states and 12658 transitions. [2023-12-02 17:58:18,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 17:58:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 9415 states and 12658 transitions. [2023-12-02 17:58:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 17:58:18,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:18,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:18,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:58:18,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:58:18,692 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:18,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash 478395897, now seen corresponding path program 1 times [2023-12-02 17:58:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527048504] [2023-12-02 17:58:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 17:58:18,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:18,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527048504] [2023-12-02 17:58:18,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527048504] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:18,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801718379] [2023-12-02 17:58:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:18,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:18,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:18,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:18,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:58:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:19,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:58:19,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:58:19,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:58:19,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801718379] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:58:19,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:58:19,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 17:58:19,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074449929] [2023-12-02 17:58:19,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:19,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:58:19,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:19,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:58:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:58:19,118 INFO L87 Difference]: Start difference. First operand 9415 states and 12658 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 17:58:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:20,526 INFO L93 Difference]: Finished difference Result 16303 states and 21121 transitions. [2023-12-02 17:58:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:58:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 127 [2023-12-02 17:58:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:20,544 INFO L225 Difference]: With dead ends: 16303 [2023-12-02 17:58:20,544 INFO L226 Difference]: Without dead ends: 11070 [2023-12-02 17:58:20,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:58:20,554 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 192 mSDsluCounter, 12513 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 15741 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:20,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 15741 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:58:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11070 states. [2023-12-02 17:58:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11070 to 10005. [2023-12-02 17:58:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 8642 states have (on average 1.3705160842397592) internal successors, (11844), 8658 states have internal predecessors, (11844), 730 states have call successors, (730), 639 states have call predecessors, (730), 631 states have return successors, (780), 708 states have call predecessors, (780), 730 states have call successors, (780) [2023-12-02 17:58:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 13354 transitions. [2023-12-02 17:58:21,325 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 13354 transitions. Word has length 127 [2023-12-02 17:58:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:21,325 INFO L495 AbstractCegarLoop]: Abstraction has 10005 states and 13354 transitions. [2023-12-02 17:58:21,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 17:58:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 13354 transitions. [2023-12-02 17:58:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 17:58:21,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:21,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:21,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 17:58:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:21,534 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:21,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1404044829, now seen corresponding path program 1 times [2023-12-02 17:58:21,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:21,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307306973] [2023-12-02 17:58:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:21,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:58:21,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307306973] [2023-12-02 17:58:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307306973] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351489413] [2023-12-02 17:58:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:21,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:21,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:21,778 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:21,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:58:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:21,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:58:21,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:58:22,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:58:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 17:58:22,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351489413] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:22,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:58:22,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8] total 17 [2023-12-02 17:58:22,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98221025] [2023-12-02 17:58:22,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:22,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:58:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:58:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:58:22,294 INFO L87 Difference]: Start difference. First operand 10005 states and 13354 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:23,278 INFO L93 Difference]: Finished difference Result 14795 states and 19249 transitions. [2023-12-02 17:58:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:58:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 122 [2023-12-02 17:58:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:23,294 INFO L225 Difference]: With dead ends: 14795 [2023-12-02 17:58:23,294 INFO L226 Difference]: Without dead ends: 10429 [2023-12-02 17:58:23,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:58:23,302 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 3366 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 6387 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:23,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 6387 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:58:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10429 states. [2023-12-02 17:58:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10429 to 10360. [2023-12-02 17:58:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10360 states, 8954 states have (on average 1.356823765914675) internal successors, (12149), 8982 states have internal predecessors, (12149), 736 states have call successors, (736), 659 states have call predecessors, (736), 668 states have return successors, (793), 719 states have call predecessors, (793), 736 states have call successors, (793) [2023-12-02 17:58:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10360 states to 10360 states and 13678 transitions. [2023-12-02 17:58:23,868 INFO L78 Accepts]: Start accepts. Automaton has 10360 states and 13678 transitions. Word has length 122 [2023-12-02 17:58:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:23,868 INFO L495 AbstractCegarLoop]: Abstraction has 10360 states and 13678 transitions. [2023-12-02 17:58:23,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10360 states and 13678 transitions. [2023-12-02 17:58:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 17:58:23,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:23,875 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:23,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 17:58:24,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:24,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:24,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash -928776739, now seen corresponding path program 1 times [2023-12-02 17:58:24,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:24,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716648527] [2023-12-02 17:58:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:24,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 17:58:24,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716648527] [2023-12-02 17:58:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716648527] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317960447] [2023-12-02 17:58:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:24,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:24,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:24,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:24,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:58:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:24,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:58:24,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:58:24,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:58:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 17:58:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317960447] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:58:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000733090] [2023-12-02 17:58:25,086 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2023-12-02 17:58:25,086 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:58:25,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:58:25,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:58:25,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:58:31,673 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2023-12-02 17:58:31,834 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 151 for LOIs [2023-12-02 17:58:32,010 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 68 for LOIs [2023-12-02 17:58:32,017 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 68 for LOIs [2023-12-02 17:58:32,056 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 95 for LOIs [2023-12-02 17:58:32,249 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2023-12-02 17:58:32,824 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:58:46,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '372835#(and (= ~a15~0 1) (<= ~t1_pc~0 1) (= 5 ~a20~0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 (+ ~local~0 2147483648)) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~a27~0 1) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0))' at error location [2023-12-02 17:58:46,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:58:46,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:58:46,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2023-12-02 17:58:46,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900073033] [2023-12-02 17:58:46,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:58:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:58:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:58:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=4736, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 17:58:46,336 INFO L87 Difference]: Start difference. First operand 10360 states and 13678 transitions. Second operand has 17 states, 14 states have (on average 10.357142857142858) internal successors, (145), 15 states have internal predecessors, (145), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2023-12-02 17:58:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:53,951 INFO L93 Difference]: Finished difference Result 24579 states and 31858 transitions. [2023-12-02 17:58:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2023-12-02 17:58:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 10.357142857142858) internal successors, (145), 15 states have internal predecessors, (145), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 127 [2023-12-02 17:58:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:53,980 INFO L225 Difference]: With dead ends: 24579 [2023-12-02 17:58:53,980 INFO L226 Difference]: Without dead ends: 16853 [2023-12-02 17:58:54,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 427 SyntacticMatches, 3 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31650 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=5819, Invalid=64141, Unknown=0, NotChecked=0, Total=69960 [2023-12-02 17:58:54,006 INFO L413 NwaCegarLoop]: 3611 mSDtfsCounter, 12028 mSDsluCounter, 22149 mSDsCounter, 0 mSdLazyCounter, 4573 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12040 SdHoareTripleChecker+Valid, 25760 SdHoareTripleChecker+Invalid, 5003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 4573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:54,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12040 Valid, 25760 Invalid, 5003 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [430 Valid, 4573 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 17:58:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16853 states. [2023-12-02 17:58:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16853 to 8275. [2023-12-02 17:58:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8275 states, 7255 states have (on average 1.3881461061337008) internal successors, (10071), 7275 states have internal predecessors, (10071), 520 states have call successors, (520), 491 states have call predecessors, (520), 498 states have return successors, (563), 509 states have call predecessors, (563), 520 states have call successors, (563) [2023-12-02 17:58:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 11154 transitions. [2023-12-02 17:58:54,682 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 11154 transitions. Word has length 127 [2023-12-02 17:58:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 8275 states and 11154 transitions. [2023-12-02 17:58:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 10.357142857142858) internal successors, (145), 15 states have internal predecessors, (145), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2023-12-02 17:58:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 11154 transitions. [2023-12-02 17:58:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 17:58:54,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:54,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:54,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 17:58:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 17:58:54,888 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:54,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -858266983, now seen corresponding path program 1 times [2023-12-02 17:58:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:54,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504252265] [2023-12-02 17:58:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:54,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 17:58:55,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:55,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504252265] [2023-12-02 17:58:55,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504252265] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:58:55,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:58:55,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:58:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841302240] [2023-12-02 17:58:55,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:58:55,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:58:55,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:58:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:58:55,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:58:55,034 INFO L87 Difference]: Start difference. First operand 8275 states and 11154 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:58:56,260 INFO L93 Difference]: Finished difference Result 13152 states and 16977 transitions. [2023-12-02 17:58:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:58:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-12-02 17:58:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:58:56,279 INFO L225 Difference]: With dead ends: 13152 [2023-12-02 17:58:56,280 INFO L226 Difference]: Without dead ends: 9624 [2023-12-02 17:58:56,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:58:56,287 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 83 mSDsluCounter, 6320 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 9535 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:58:56,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 9535 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:58:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9624 states. [2023-12-02 17:58:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9624 to 9227. [2023-12-02 17:58:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9227 states, 8029 states have (on average 1.3696599825632083) internal successors, (10997), 8046 states have internal predecessors, (10997), 616 states have call successors, (616), 575 states have call predecessors, (616), 580 states have return successors, (680), 606 states have call predecessors, (680), 616 states have call successors, (680) [2023-12-02 17:58:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9227 states to 9227 states and 12293 transitions. [2023-12-02 17:58:56,943 INFO L78 Accepts]: Start accepts. Automaton has 9227 states and 12293 transitions. Word has length 123 [2023-12-02 17:58:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:58:56,944 INFO L495 AbstractCegarLoop]: Abstraction has 9227 states and 12293 transitions. [2023-12-02 17:58:56,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 17:58:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9227 states and 12293 transitions. [2023-12-02 17:58:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 17:58:56,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:58:56,948 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:58:56,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 17:58:56,948 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:58:56,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:58:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1816644031, now seen corresponding path program 1 times [2023-12-02 17:58:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:58:56,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500067190] [2023-12-02 17:58:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:56,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:58:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:58:57,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:58:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500067190] [2023-12-02 17:58:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500067190] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:58:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517908639] [2023-12-02 17:58:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:58:57,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:58:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:58:57,214 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:58:57,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:58:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:58:57,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 17:58:57,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:58:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:58:57,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:58:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 17:58:57,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517908639] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:58:57,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109591039] [2023-12-02 17:58:57,866 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-12-02 17:58:57,866 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:58:57,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:58:57,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:58:57,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:59:06,988 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 69 for LOIs [2023-12-02 17:59:07,018 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 153 for LOIs [2023-12-02 17:59:07,196 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 69 for LOIs [2023-12-02 17:59:07,203 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 69 for LOIs [2023-12-02 17:59:07,242 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 101 for LOIs [2023-12-02 17:59:07,557 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 69 for LOIs [2023-12-02 17:59:08,629 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:59:24,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '440647#(and (= ~a15~0 1) (<= ~t1_pc~0 1) (= 5 ~a20~0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~a27~0 1) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0))' at error location [2023-12-02 17:59:24,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:59:24,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:59:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 18 [2023-12-02 17:59:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689678999] [2023-12-02 17:59:24,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:59:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:59:24,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:59:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:59:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=5489, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 17:59:24,907 INFO L87 Difference]: Start difference. First operand 9227 states and 12293 transitions. Second operand has 18 states, 15 states have (on average 9.866666666666667) internal successors, (148), 16 states have internal predecessors, (148), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2023-12-02 17:59:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:59:31,052 INFO L93 Difference]: Finished difference Result 18105 states and 23440 transitions. [2023-12-02 17:59:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-12-02 17:59:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 9.866666666666667) internal successors, (148), 16 states have internal predecessors, (148), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 129 [2023-12-02 17:59:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:59:31,069 INFO L225 Difference]: With dead ends: 18105 [2023-12-02 17:59:31,069 INFO L226 Difference]: Without dead ends: 11824 [2023-12-02 17:59:31,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 384 SyntacticMatches, 4 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21628 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=3586, Invalid=45920, Unknown=0, NotChecked=0, Total=49506 [2023-12-02 17:59:31,079 INFO L413 NwaCegarLoop]: 3559 mSDtfsCounter, 14670 mSDsluCounter, 28286 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14678 SdHoareTripleChecker+Valid, 31845 SdHoareTripleChecker+Invalid, 4904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:59:31,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14678 Valid, 31845 Invalid, 4904 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [315 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 17:59:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11824 states. [2023-12-02 17:59:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11824 to 7720. [2023-12-02 17:59:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7720 states, 6760 states have (on average 1.3958579881656805) internal successors, (9436), 6775 states have internal predecessors, (9436), 487 states have call successors, (487), 464 states have call predecessors, (487), 471 states have return successors, (545), 481 states have call predecessors, (545), 487 states have call successors, (545) [2023-12-02 17:59:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7720 states to 7720 states and 10468 transitions. [2023-12-02 17:59:31,656 INFO L78 Accepts]: Start accepts. Automaton has 7720 states and 10468 transitions. Word has length 129 [2023-12-02 17:59:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:59:31,657 INFO L495 AbstractCegarLoop]: Abstraction has 7720 states and 10468 transitions. [2023-12-02 17:59:31,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 9.866666666666667) internal successors, (148), 16 states have internal predecessors, (148), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2023-12-02 17:59:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7720 states and 10468 transitions. [2023-12-02 17:59:31,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 17:59:31,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:59:31,661 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:59:31,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 17:59:31,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 17:59:31,861 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:59:31,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:59:31,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1708228843, now seen corresponding path program 1 times [2023-12-02 17:59:31,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:59:31,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249336203] [2023-12-02 17:59:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:59:31,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:59:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:59:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:59:32,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:59:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249336203] [2023-12-02 17:59:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249336203] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:59:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285239595] [2023-12-02 17:59:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:59:32,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:59:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:59:32,511 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:59:32,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:59:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:59:32,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 17:59:32,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:59:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:59:33,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:59:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 17:59:33,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285239595] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:59:33,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497010425] [2023-12-02 17:59:33,647 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 17:59:33,647 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:59:33,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:59:33,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:59:33,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:59:42,526 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 70 for LOIs [2023-12-02 17:59:42,555 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 155 for LOIs [2023-12-02 17:59:42,767 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 70 for LOIs [2023-12-02 17:59:42,775 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 70 for LOIs [2023-12-02 17:59:42,816 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 103 for LOIs [2023-12-02 17:59:43,068 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 70 for LOIs [2023-12-02 17:59:44,322 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:00:03,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '472907#(and (= ~a15~0 1) (<= ~t1_pc~0 1) (= 5 ~a20~0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0))' at error location [2023-12-02 18:00:03,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:00:03,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:00:03,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2023-12-02 18:00:03,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292876778] [2023-12-02 18:00:03,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:00:03,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 18:00:03,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 18:00:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=9210, Unknown=0, NotChecked=0, Total=9900 [2023-12-02 18:00:03,324 INFO L87 Difference]: Start difference. First operand 7720 states and 10468 transitions. Second operand has 36 states, 24 states have (on average 8.916666666666666) internal successors, (214), 27 states have internal predecessors, (214), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2023-12-02 18:00:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:09,862 INFO L93 Difference]: Finished difference Result 17423 states and 22356 transitions. [2023-12-02 18:00:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 18:00:09,862 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.916666666666666) internal successors, (214), 27 states have internal predecessors, (214), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 131 [2023-12-02 18:00:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:09,879 INFO L225 Difference]: With dead ends: 17423 [2023-12-02 18:00:09,880 INFO L226 Difference]: Without dead ends: 12362 [2023-12-02 18:00:09,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9777 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=2360, Invalid=23080, Unknown=0, NotChecked=0, Total=25440 [2023-12-02 18:00:09,887 INFO L413 NwaCegarLoop]: 3138 mSDtfsCounter, 29460 mSDsluCounter, 37660 mSDsCounter, 0 mSdLazyCounter, 4938 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29460 SdHoareTripleChecker+Valid, 40798 SdHoareTripleChecker+Invalid, 6143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 4938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:09,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29460 Valid, 40798 Invalid, 6143 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 4938 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 18:00:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12362 states. [2023-12-02 18:00:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12362 to 7429. [2023-12-02 18:00:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 6520 states have (on average 1.400920245398773) internal successors, (9134), 6533 states have internal predecessors, (9134), 467 states have call successors, (467), 440 states have call predecessors, (467), 440 states have return successors, (467), 456 states have call predecessors, (467), 467 states have call successors, (467) [2023-12-02 18:00:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 10068 transitions. [2023-12-02 18:00:10,558 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 10068 transitions. Word has length 131 [2023-12-02 18:00:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:10,558 INFO L495 AbstractCegarLoop]: Abstraction has 7429 states and 10068 transitions. [2023-12-02 18:00:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.916666666666666) internal successors, (214), 27 states have internal predecessors, (214), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2023-12-02 18:00:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 10068 transitions. [2023-12-02 18:00:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 18:00:10,561 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:10,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:10,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-02 18:00:10,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 18:00:10,762 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:10,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash 704833540, now seen corresponding path program 1 times [2023-12-02 18:00:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:10,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072061553] [2023-12-02 18:00:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:10,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-02 18:00:10,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072061553] [2023-12-02 18:00:10,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072061553] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774311241] [2023-12-02 18:00:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:10,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:10,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:10,910 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:10,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 18:00:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:11,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:00:11,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 18:00:11,134 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:00:11,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774311241] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:11,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:00:11,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 18:00:11,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066276649] [2023-12-02 18:00:11,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:11,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:00:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:00:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:00:11,136 INFO L87 Difference]: Start difference. First operand 7429 states and 10068 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:00:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:12,191 INFO L93 Difference]: Finished difference Result 12819 states and 16518 transitions. [2023-12-02 18:00:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:00:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 149 [2023-12-02 18:00:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:12,207 INFO L225 Difference]: With dead ends: 12819 [2023-12-02 18:00:12,207 INFO L226 Difference]: Without dead ends: 7717 [2023-12-02 18:00:12,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:00:12,217 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3343 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 3205 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:12,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 3205 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:00:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7717 states. [2023-12-02 18:00:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7717 to 7535. [2023-12-02 18:00:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7535 states, 6620 states have (on average 1.3874622356495467) internal successors, (9185), 6633 states have internal predecessors, (9185), 467 states have call successors, (467), 446 states have call predecessors, (467), 446 states have return successors, (477), 456 states have call predecessors, (477), 467 states have call successors, (477) [2023-12-02 18:00:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7535 states to 7535 states and 10129 transitions. [2023-12-02 18:00:12,925 INFO L78 Accepts]: Start accepts. Automaton has 7535 states and 10129 transitions. Word has length 149 [2023-12-02 18:00:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:12,925 INFO L495 AbstractCegarLoop]: Abstraction has 7535 states and 10129 transitions. [2023-12-02 18:00:12,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:00:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7535 states and 10129 transitions. [2023-12-02 18:00:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 18:00:12,930 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:12,930 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:12,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 18:00:13,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 18:00:13,131 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:13,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2066179645, now seen corresponding path program 1 times [2023-12-02 18:00:13,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:13,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273277128] [2023-12-02 18:00:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 18:00:13,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:13,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273277128] [2023-12-02 18:00:13,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273277128] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:13,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010982677] [2023-12-02 18:00:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:13,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:13,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:13,183 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:13,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 18:00:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:13,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:00:13,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 18:00:13,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:00:13,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010982677] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:13,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:00:13,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 18:00:13,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164829901] [2023-12-02 18:00:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:13,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:00:13,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:00:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:00:13,384 INFO L87 Difference]: Start difference. First operand 7535 states and 10129 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 18:00:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:14,468 INFO L93 Difference]: Finished difference Result 12385 states and 15977 transitions. [2023-12-02 18:00:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:00:14,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 149 [2023-12-02 18:00:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:14,479 INFO L225 Difference]: With dead ends: 12385 [2023-12-02 18:00:14,479 INFO L226 Difference]: Without dead ends: 7174 [2023-12-02 18:00:14,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:00:14,486 INFO L413 NwaCegarLoop]: 3217 mSDtfsCounter, 86 mSDsluCounter, 3138 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 6355 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:14,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6355 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:00:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7174 states. [2023-12-02 18:00:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7174 to 7074. [2023-12-02 18:00:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 6205 states have (on average 1.370668815471394) internal successors, (8505), 6218 states have internal predecessors, (8505), 444 states have call successors, (444), 423 states have call predecessors, (444), 423 states have return successors, (454), 433 states have call predecessors, (454), 444 states have call successors, (454) [2023-12-02 18:00:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 9403 transitions. [2023-12-02 18:00:15,096 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 9403 transitions. Word has length 149 [2023-12-02 18:00:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:15,096 INFO L495 AbstractCegarLoop]: Abstraction has 7074 states and 9403 transitions. [2023-12-02 18:00:15,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 18:00:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 9403 transitions. [2023-12-02 18:00:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 18:00:15,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:15,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:15,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 18:00:15,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:15,300 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:15,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1728071932, now seen corresponding path program 1 times [2023-12-02 18:00:15,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:15,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397335205] [2023-12-02 18:00:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:15,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 18:00:15,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:15,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397335205] [2023-12-02 18:00:15,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397335205] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:15,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943052230] [2023-12-02 18:00:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:15,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:15,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:15,582 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:15,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 18:00:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:15,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:00:15,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:00:15,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:00:15,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943052230] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:15,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:00:15,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 18:00:15,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824098163] [2023-12-02 18:00:15,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:15,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:00:15,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:00:15,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:00:15,796 INFO L87 Difference]: Start difference. First operand 7074 states and 9403 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 18:00:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:17,324 INFO L93 Difference]: Finished difference Result 12756 states and 15904 transitions. [2023-12-02 18:00:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:00:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 152 [2023-12-02 18:00:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:17,337 INFO L225 Difference]: With dead ends: 12756 [2023-12-02 18:00:17,337 INFO L226 Difference]: Without dead ends: 8096 [2023-12-02 18:00:17,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:00:17,345 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 207 mSDsluCounter, 12496 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 15707 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:17,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 15707 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:00:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2023-12-02 18:00:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 7561. [2023-12-02 18:00:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7561 states, 6558 states have (on average 1.351479109484599) internal successors, (8863), 6578 states have internal predecessors, (8863), 514 states have call successors, (514), 477 states have call predecessors, (514), 487 states have return successors, (564), 506 states have call predecessors, (564), 514 states have call successors, (564) [2023-12-02 18:00:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7561 states to 7561 states and 9941 transitions. [2023-12-02 18:00:18,053 INFO L78 Accepts]: Start accepts. Automaton has 7561 states and 9941 transitions. Word has length 152 [2023-12-02 18:00:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:18,053 INFO L495 AbstractCegarLoop]: Abstraction has 7561 states and 9941 transitions. [2023-12-02 18:00:18,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 18:00:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 7561 states and 9941 transitions. [2023-12-02 18:00:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-02 18:00:18,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:18,058 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:18,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 18:00:18,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:18,258 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:18,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash 335851464, now seen corresponding path program 1 times [2023-12-02 18:00:18,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:18,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128430513] [2023-12-02 18:00:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:18,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-12-02 18:00:18,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128430513] [2023-12-02 18:00:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128430513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:18,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:00:18,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:00:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742095794] [2023-12-02 18:00:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:00:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:00:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:00:18,452 INFO L87 Difference]: Start difference. First operand 7561 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:00:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:21,573 INFO L93 Difference]: Finished difference Result 21542 states and 25877 transitions. [2023-12-02 18:00:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:00:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 181 [2023-12-02 18:00:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:21,603 INFO L225 Difference]: With dead ends: 21542 [2023-12-02 18:00:21,603 INFO L226 Difference]: Without dead ends: 18621 [2023-12-02 18:00:21,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:00:21,612 INFO L413 NwaCegarLoop]: 3403 mSDtfsCounter, 3641 mSDsluCounter, 9917 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3641 SdHoareTripleChecker+Valid, 13320 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:21,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3641 Valid, 13320 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:00:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18621 states. [2023-12-02 18:00:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18621 to 11821. [2023-12-02 18:00:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11821 states, 10044 states have (on average 1.2772799681401832) internal successors, (12829), 10074 states have internal predecessors, (12829), 920 states have call successors, (920), 836 states have call predecessors, (920), 855 states have return successors, (1022), 911 states have call predecessors, (1022), 920 states have call successors, (1022) [2023-12-02 18:00:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11821 states to 11821 states and 14771 transitions. [2023-12-02 18:00:23,004 INFO L78 Accepts]: Start accepts. Automaton has 11821 states and 14771 transitions. Word has length 181 [2023-12-02 18:00:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:23,005 INFO L495 AbstractCegarLoop]: Abstraction has 11821 states and 14771 transitions. [2023-12-02 18:00:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:00:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 11821 states and 14771 transitions. [2023-12-02 18:00:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 18:00:23,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:23,011 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:23,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 18:00:23,012 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:23,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:23,012 INFO L85 PathProgramCache]: Analyzing trace with hash 385043903, now seen corresponding path program 1 times [2023-12-02 18:00:23,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:23,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308919063] [2023-12-02 18:00:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:23,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 42 proven. 75 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-12-02 18:00:23,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308919063] [2023-12-02 18:00:23,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308919063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281416172] [2023-12-02 18:00:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:23,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:23,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:23,726 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:23,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 18:00:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:23,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 18:00:23,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 18:00:24,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:00:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 50 proven. 19 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-12-02 18:00:24,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281416172] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:00:24,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671242669] [2023-12-02 18:00:24,477 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-12-02 18:00:24,477 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:00:24,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:00:24,478 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:00:24,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:00:32,913 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 6 for LOIs [2023-12-02 18:00:32,920 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 141 for LOIs [2023-12-02 18:00:33,051 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 6 for LOIs [2023-12-02 18:00:33,052 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 6 for LOIs [2023-12-02 18:00:33,061 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 1 for LOIs [2023-12-02 18:00:33,091 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 18:00:33,167 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:00:39,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '616345#(and (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (<= 0 ~t2_pc~0) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (not (= ~token~0 (+ 3 ~local~0))) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (<= 0 ~t3_pc~0) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|))' at error location [2023-12-02 18:00:39,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:00:39,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:00:39,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 12] total 31 [2023-12-02 18:00:39,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896409050] [2023-12-02 18:00:39,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:00:39,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 18:00:39,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 18:00:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=9172, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 18:00:39,168 INFO L87 Difference]: Start difference. First operand 11821 states and 14771 transitions. Second operand has 31 states, 20 states have (on average 12.05) internal successors, (241), 24 states have internal predecessors, (241), 12 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2023-12-02 18:00:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:47,335 INFO L93 Difference]: Finished difference Result 22488 states and 27100 transitions. [2023-12-02 18:00:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-12-02 18:00:47,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 20 states have (on average 12.05) internal successors, (241), 24 states have internal predecessors, (241), 12 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 197 [2023-12-02 18:00:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:47,355 INFO L225 Difference]: With dead ends: 22488 [2023-12-02 18:00:47,356 INFO L226 Difference]: Without dead ends: 13489 [2023-12-02 18:00:47,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 529 SyntacticMatches, 7 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13642 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2998, Invalid=32534, Unknown=0, NotChecked=0, Total=35532 [2023-12-02 18:00:47,368 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 38758 mSDsluCounter, 25850 mSDsCounter, 0 mSdLazyCounter, 5626 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38759 SdHoareTripleChecker+Valid, 29019 SdHoareTripleChecker+Invalid, 6601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 5626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:47,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38759 Valid, 29019 Invalid, 6601 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [975 Valid, 5626 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 18:00:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13489 states. [2023-12-02 18:00:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13489 to 10202. [2023-12-02 18:00:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 8739 states have (on average 1.297631307929969) internal successors, (11340), 8769 states have internal predecessors, (11340), 764 states have call successors, (764), 697 states have call predecessors, (764), 697 states have return successors, (764), 736 states have call predecessors, (764), 764 states have call successors, (764) [2023-12-02 18:00:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 12868 transitions. [2023-12-02 18:00:48,626 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 12868 transitions. Word has length 197 [2023-12-02 18:00:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:48,626 INFO L495 AbstractCegarLoop]: Abstraction has 10202 states and 12868 transitions. [2023-12-02 18:00:48,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 20 states have (on average 12.05) internal successors, (241), 24 states have internal predecessors, (241), 12 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2023-12-02 18:00:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 12868 transitions. [2023-12-02 18:00:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-12-02 18:00:48,631 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:48,631 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:48,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 18:00:48,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 18:00:48,832 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:48,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1099882444, now seen corresponding path program 1 times [2023-12-02 18:00:48,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:48,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832676428] [2023-12-02 18:00:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:48,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 55 proven. 63 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2023-12-02 18:00:48,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:48,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832676428] [2023-12-02 18:00:48,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832676428] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:48,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492964262] [2023-12-02 18:00:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:48,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:48,984 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:48,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 18:00:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:49,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:00:49,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-12-02 18:00:49,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:00:49,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492964262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:49,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:00:49,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 18:00:49,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261302323] [2023-12-02 18:00:49,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:49,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:00:49,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:00:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:00:49,167 INFO L87 Difference]: Start difference. First operand 10202 states and 12868 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 18:00:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:50,496 INFO L93 Difference]: Finished difference Result 14714 states and 17848 transitions. [2023-12-02 18:00:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:00:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 218 [2023-12-02 18:00:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:50,508 INFO L225 Difference]: With dead ends: 14714 [2023-12-02 18:00:50,508 INFO L226 Difference]: Without dead ends: 7353 [2023-12-02 18:00:50,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:00:50,516 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3340 mSDsluCounter, 3301 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3340 SdHoareTripleChecker+Valid, 6509 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:50,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3340 Valid, 6509 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:00:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7353 states. [2023-12-02 18:00:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7353 to 7056. [2023-12-02 18:00:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7056 states, 6150 states have (on average 1.3497560975609757) internal successors, (8301), 6169 states have internal predecessors, (8301), 470 states have call successors, (470), 434 states have call predecessors, (470), 434 states have return successors, (470), 453 states have call predecessors, (470), 470 states have call successors, (470) [2023-12-02 18:00:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7056 states to 7056 states and 9241 transitions. [2023-12-02 18:00:51,347 INFO L78 Accepts]: Start accepts. Automaton has 7056 states and 9241 transitions. Word has length 218 [2023-12-02 18:00:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:51,347 INFO L495 AbstractCegarLoop]: Abstraction has 7056 states and 9241 transitions. [2023-12-02 18:00:51,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 18:00:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7056 states and 9241 transitions. [2023-12-02 18:00:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-12-02 18:00:51,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:51,352 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:51,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 18:00:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:51,552 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:51,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash 279087896, now seen corresponding path program 2 times [2023-12-02 18:00:51,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:51,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47612430] [2023-12-02 18:00:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:51,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 92 proven. 70 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-12-02 18:00:51,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:51,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47612430] [2023-12-02 18:00:51,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47612430] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:51,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584654997] [2023-12-02 18:00:51,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:00:51,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:51,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:51,706 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:51,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 18:00:51,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 18:00:51,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:00:51,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:00:51,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-12-02 18:00:51,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:00:51,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584654997] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:51,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:00:51,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 18:00:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152216810] [2023-12-02 18:00:51,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:51,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:00:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:00:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:00:51,843 INFO L87 Difference]: Start difference. First operand 7056 states and 9241 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:00:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:52,988 INFO L93 Difference]: Finished difference Result 10158 states and 12621 transitions. [2023-12-02 18:00:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:00:52,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 218 [2023-12-02 18:00:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:52,997 INFO L225 Difference]: With dead ends: 10158 [2023-12-02 18:00:52,997 INFO L226 Difference]: Without dead ends: 5730 [2023-12-02 18:00:53,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:00:53,002 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3335 mSDsluCounter, 3298 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3335 SdHoareTripleChecker+Valid, 6503 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:53,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3335 Valid, 6503 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:00:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2023-12-02 18:00:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5509. [2023-12-02 18:00:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5509 states, 4894 states have (on average 1.4029423784225583) internal successors, (6866), 4905 states have internal predecessors, (6866), 316 states have call successors, (316), 297 states have call predecessors, (316), 297 states have return successors, (316), 307 states have call predecessors, (316), 316 states have call successors, (316) [2023-12-02 18:00:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5509 states to 5509 states and 7498 transitions. [2023-12-02 18:00:53,566 INFO L78 Accepts]: Start accepts. Automaton has 5509 states and 7498 transitions. Word has length 218 [2023-12-02 18:00:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:53,566 INFO L495 AbstractCegarLoop]: Abstraction has 5509 states and 7498 transitions. [2023-12-02 18:00:53,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:00:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5509 states and 7498 transitions. [2023-12-02 18:00:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-02 18:00:53,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:53,570 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:53,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 18:00:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:53,770 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:53,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1244620739, now seen corresponding path program 1 times [2023-12-02 18:00:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083860508] [2023-12-02 18:00:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 96 proven. 70 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2023-12-02 18:00:53,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:53,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083860508] [2023-12-02 18:00:53,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083860508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:53,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694398801] [2023-12-02 18:00:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:53,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:53,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:53,978 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:53,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 18:00:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:54,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:00:54,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-12-02 18:00:54,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:00:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694398801] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:00:54,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 18:00:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892164962] [2023-12-02 18:00:54,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:54,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:00:54,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:00:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:00:54,184 INFO L87 Difference]: Start difference. First operand 5509 states and 7498 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:00:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:55,278 INFO L93 Difference]: Finished difference Result 8305 states and 10534 transitions. [2023-12-02 18:00:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:00:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 220 [2023-12-02 18:00:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:55,286 INFO L225 Difference]: With dead ends: 8305 [2023-12-02 18:00:55,286 INFO L226 Difference]: Without dead ends: 5501 [2023-12-02 18:00:55,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:00:55,289 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3342 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3342 SdHoareTripleChecker+Valid, 6566 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:55,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3342 Valid, 6566 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:00:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2023-12-02 18:00:55,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 5261. [2023-12-02 18:00:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 4688 states have (on average 1.4012372013651877) internal successors, (6569), 4700 states have internal predecessors, (6569), 296 states have call successors, (296), 275 states have call predecessors, (296), 275 states have return successors, (296), 286 states have call predecessors, (296), 296 states have call successors, (296) [2023-12-02 18:00:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7161 transitions. [2023-12-02 18:00:55,808 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7161 transitions. Word has length 220 [2023-12-02 18:00:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:55,808 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 7161 transitions. [2023-12-02 18:00:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:00:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7161 transitions. [2023-12-02 18:00:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-12-02 18:00:55,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:55,812 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:55,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 18:00:56,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 18:00:56,013 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:56,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash 289421934, now seen corresponding path program 1 times [2023-12-02 18:00:56,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:56,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791643895] [2023-12-02 18:00:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:56,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 165 proven. 38 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-12-02 18:00:56,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:00:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791643895] [2023-12-02 18:00:56,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791643895] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:00:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627892121] [2023-12-02 18:00:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:56,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:00:56,314 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:00:56,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 18:00:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:00:56,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 18:00:56,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:00:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 18:00:56,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:00:56,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627892121] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:00:56,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:00:56,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2023-12-02 18:00:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400936434] [2023-12-02 18:00:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:00:56,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:00:56,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:00:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:00:56,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:00:56,575 INFO L87 Difference]: Start difference. First operand 5261 states and 7161 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 18:00:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:00:57,493 INFO L93 Difference]: Finished difference Result 5729 states and 7661 transitions. [2023-12-02 18:00:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:00:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 222 [2023-12-02 18:00:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:00:57,496 INFO L225 Difference]: With dead ends: 5729 [2023-12-02 18:00:57,496 INFO L226 Difference]: Without dead ends: 1642 [2023-12-02 18:00:57,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:00:57,500 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 71 mSDsluCounter, 6293 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 9486 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:00:57,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 9486 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:00:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2023-12-02 18:00:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2023-12-02 18:00:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.9914686166971358) internal successors, (3268), 1641 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:00:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2023-12-02 18:00:57,520 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 222 [2023-12-02 18:00:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:00:57,520 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2023-12-02 18:00:57,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 18:00:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2023-12-02 18:00:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2023-12-02 18:00:57,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:00:57,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:00:57,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 18:00:57,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:00:57,752 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:00:57,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:00:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash -841778888, now seen corresponding path program 1 times [2023-12-02 18:00:57,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:00:57,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554296282] [2023-12-02 18:00:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:00:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:00:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:00,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:01:00,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554296282] [2023-12-02 18:01:00,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554296282] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:00,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:00,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:01:00,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716698808] [2023-12-02 18:01:00,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:00,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:01:00,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:01:00,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:01:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:01:00,707 INFO L87 Difference]: Start difference. First operand 1642 states and 3268 transitions. Second operand has 4 states, 4 states have (on average 408.0) internal successors, (1632), 3 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:15,098 INFO L93 Difference]: Finished difference Result 8193 states and 16325 transitions. [2023-12-02 18:01:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:01:15,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 408.0) internal successors, (1632), 3 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1632 [2023-12-02 18:01:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:15,107 INFO L225 Difference]: With dead ends: 8193 [2023-12-02 18:01:15,107 INFO L226 Difference]: Without dead ends: 6553 [2023-12-02 18:01:15,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:15,110 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 3699 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9654 mSolverCounterSat, 5550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3699 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 15204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5550 IncrementalHoareTripleChecker+Valid, 9654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:15,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3699 Valid, 481 Invalid, 15204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5550 Valid, 9654 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2023-12-02 18:01:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2023-12-02 18:01:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 4918. [2023-12-02 18:01:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4917 states have (on average 1.5603009965426073) internal successors, (7672), 4917 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 7672 transitions. [2023-12-02 18:01:15,165 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 7672 transitions. Word has length 1632 [2023-12-02 18:01:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:15,167 INFO L495 AbstractCegarLoop]: Abstraction has 4918 states and 7672 transitions. [2023-12-02 18:01:15,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 408.0) internal successors, (1632), 3 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 7672 transitions. [2023-12-02 18:01:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1753 [2023-12-02 18:01:15,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:15,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:15,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 18:01:15,197 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:01:15,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:15,198 INFO L85 PathProgramCache]: Analyzing trace with hash 83262348, now seen corresponding path program 1 times [2023-12-02 18:01:15,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:01:15,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586284136] [2023-12-02 18:01:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:15,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:01:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:16,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:01:16,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586284136] [2023-12-02 18:01:16,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586284136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:16,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:01:16,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950437102] [2023-12-02 18:01:16,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:16,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:01:16,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:01:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:01:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:01:16,443 INFO L87 Difference]: Start difference. First operand 4918 states and 7672 transitions. Second operand has 3 states, 3 states have (on average 584.0) internal successors, (1752), 3 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:22,903 INFO L93 Difference]: Finished difference Result 13110 states and 21367 transitions. [2023-12-02 18:01:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:01:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 584.0) internal successors, (1752), 3 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1752 [2023-12-02 18:01:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:22,912 INFO L225 Difference]: With dead ends: 13110 [2023-12-02 18:01:22,912 INFO L226 Difference]: Without dead ends: 8194 [2023-12-02 18:01:22,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:01:22,916 INFO L413 NwaCegarLoop]: 2814 mSDtfsCounter, 1643 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 6788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1422 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:22,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 2826 Invalid, 6788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-12-02 18:01:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2023-12-02 18:01:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 8194. [2023-12-02 18:01:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8194 states, 8193 states have (on average 1.4168192359331135) internal successors, (11608), 8193 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8194 states to 8194 states and 11608 transitions. [2023-12-02 18:01:22,997 INFO L78 Accepts]: Start accepts. Automaton has 8194 states and 11608 transitions. Word has length 1752 [2023-12-02 18:01:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:22,998 INFO L495 AbstractCegarLoop]: Abstraction has 8194 states and 11608 transitions. [2023-12-02 18:01:22,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 584.0) internal successors, (1752), 3 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 8194 states and 11608 transitions. [2023-12-02 18:01:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1760 [2023-12-02 18:01:23,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:23,032 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:23,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 18:01:23,032 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:01:23,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:23,033 INFO L85 PathProgramCache]: Analyzing trace with hash -148370582, now seen corresponding path program 1 times [2023-12-02 18:01:23,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:01:23,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546852462] [2023-12-02 18:01:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:01:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:01:25,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:01:25,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546852462] [2023-12-02 18:01:25,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546852462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:25,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:25,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:01:25,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274713929] [2023-12-02 18:01:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:25,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:01:25,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:01:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:01:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:01:25,212 INFO L87 Difference]: Start difference. First operand 8194 states and 11608 transitions. Second operand has 3 states, 3 states have (on average 583.0) internal successors, (1749), 3 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:30,718 INFO L93 Difference]: Finished difference Result 19662 states and 27150 transitions. [2023-12-02 18:01:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:01:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 583.0) internal successors, (1749), 3 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1759 [2023-12-02 18:01:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:30,731 INFO L225 Difference]: With dead ends: 19662 [2023-12-02 18:01:30,731 INFO L226 Difference]: Without dead ends: 11470 [2023-12-02 18:01:30,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:01:30,737 INFO L413 NwaCegarLoop]: 2897 mSDtfsCounter, 1632 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5341 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 5539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 5341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:30,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 2909 Invalid, 5539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 5341 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-02 18:01:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11470 states. [2023-12-02 18:01:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 11470. [2023-12-02 18:01:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11470 states, 11469 states have (on average 1.3375185282064697) internal successors, (15340), 11469 states have internal predecessors, (15340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11470 states to 11470 states and 15340 transitions. [2023-12-02 18:01:30,852 INFO L78 Accepts]: Start accepts. Automaton has 11470 states and 15340 transitions. Word has length 1759 [2023-12-02 18:01:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:30,852 INFO L495 AbstractCegarLoop]: Abstraction has 11470 states and 15340 transitions. [2023-12-02 18:01:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 583.0) internal successors, (1749), 3 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 11470 states and 15340 transitions. [2023-12-02 18:01:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1766 [2023-12-02 18:01:30,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:30,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:30,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 18:01:30,888 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:01:30,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1060148512, now seen corresponding path program 1 times [2023-12-02 18:01:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:01:30,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099507423] [2023-12-02 18:01:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:01:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 18:01:31,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:01:31,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099507423] [2023-12-02 18:01:31,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099507423] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:31,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:31,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:01:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344092308] [2023-12-02 18:01:31,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:31,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:01:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:01:31,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:01:31,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:01:31,884 INFO L87 Difference]: Start difference. First operand 11470 states and 15340 transitions. Second operand has 3 states, 3 states have (on average 581.3333333333334) internal successors, (1744), 2 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:38,613 INFO L93 Difference]: Finished difference Result 32766 states and 44371 transitions. [2023-12-02 18:01:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:01:38,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 581.3333333333334) internal successors, (1744), 2 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1765 [2023-12-02 18:01:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:38,635 INFO L225 Difference]: With dead ends: 32766 [2023-12-02 18:01:38,635 INFO L226 Difference]: Without dead ends: 21298 [2023-12-02 18:01:38,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:01:38,643 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 1600 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4554 mSolverCounterSat, 2253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 6807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2253 IncrementalHoareTripleChecker+Valid, 4554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:38,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 1372 Invalid, 6807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2253 Valid, 4554 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-12-02 18:01:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21298 states. [2023-12-02 18:01:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21298 to 21298. [2023-12-02 18:01:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21298 states, 21297 states have (on average 1.2646382119547355) internal successors, (26933), 21297 states have internal predecessors, (26933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21298 states to 21298 states and 26933 transitions. [2023-12-02 18:01:38,854 INFO L78 Accepts]: Start accepts. Automaton has 21298 states and 26933 transitions. Word has length 1765 [2023-12-02 18:01:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:38,855 INFO L495 AbstractCegarLoop]: Abstraction has 21298 states and 26933 transitions. [2023-12-02 18:01:38,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 581.3333333333334) internal successors, (1744), 2 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:01:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 21298 states and 26933 transitions. [2023-12-02 18:01:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1778 [2023-12-02 18:01:38,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:38,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:38,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-12-02 18:01:38,896 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:01:38,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1886269710, now seen corresponding path program 1 times [2023-12-02 18:01:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:01:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502821765] [2023-12-02 18:01:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:38,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:01:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 18:01:41,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:01:41,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502821765] [2023-12-02 18:01:41,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502821765] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:41,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:41,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:01:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342824425] [2023-12-02 18:01:41,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:41,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:01:41,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:01:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:01:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:41,941 INFO L87 Difference]: Start difference. First operand 21298 states and 26933 transitions. Second operand has 5 states, 5 states have (on average 348.6) internal successors, (1743), 4 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:01,606 INFO L93 Difference]: Finished difference Result 70437 states and 93695 transitions. [2023-12-02 18:02:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:02:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 348.6) internal successors, (1743), 4 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1777 [2023-12-02 18:02:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:01,656 INFO L225 Difference]: With dead ends: 70437 [2023-12-02 18:02:01,656 INFO L226 Difference]: Without dead ends: 45868 [2023-12-02 18:02:01,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:02:01,674 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 6749 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 17315 mSolverCounterSat, 6236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6749 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 23551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6236 IncrementalHoareTripleChecker+Valid, 17315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:01,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6749 Valid, 696 Invalid, 23551 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6236 Valid, 17315 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2023-12-02 18:02:01,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45868 states. [2023-12-02 18:02:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45868 to 42592. [2023-12-02 18:02:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42592 states, 42591 states have (on average 1.1514404451644713) internal successors, (49041), 42591 states have internal predecessors, (49041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42592 states to 42592 states and 49041 transitions. [2023-12-02 18:02:02,134 INFO L78 Accepts]: Start accepts. Automaton has 42592 states and 49041 transitions. Word has length 1777 [2023-12-02 18:02:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:02,135 INFO L495 AbstractCegarLoop]: Abstraction has 42592 states and 49041 transitions. [2023-12-02 18:02:02,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 348.6) internal successors, (1743), 4 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 42592 states and 49041 transitions. [2023-12-02 18:02:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2023 [2023-12-02 18:02:02,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:02,266 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:02,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-12-02 18:02:02,266 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:02:02,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1841713954, now seen corresponding path program 1 times [2023-12-02 18:02:02,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:02:02,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710868597] [2023-12-02 18:02:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:02,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:02:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-12-02 18:02:03,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:02:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710868597] [2023-12-02 18:02:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710868597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:03,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:02:03,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133351122] [2023-12-02 18:02:03,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:03,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:02:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:02:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:02:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:03,752 INFO L87 Difference]: Start difference. First operand 42592 states and 49041 transitions. Second operand has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:10,596 INFO L93 Difference]: Finished difference Result 99924 states and 116180 transitions. [2023-12-02 18:02:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:02:10,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2022 [2023-12-02 18:02:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:10,663 INFO L225 Difference]: With dead ends: 99924 [2023-12-02 18:02:10,663 INFO L226 Difference]: Without dead ends: 57334 [2023-12-02 18:02:10,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:10,690 INFO L413 NwaCegarLoop]: 2840 mSDtfsCounter, 1650 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5778 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 7081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 5778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:10,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 2851 Invalid, 7081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 5778 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-12-02 18:02:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57334 states. [2023-12-02 18:02:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57334 to 55696. [2023-12-02 18:02:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55696 states, 55695 states have (on average 1.1430110422838675) internal successors, (63660), 55695 states have internal predecessors, (63660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55696 states to 55696 states and 63660 transitions. [2023-12-02 18:02:11,386 INFO L78 Accepts]: Start accepts. Automaton has 55696 states and 63660 transitions. Word has length 2022 [2023-12-02 18:02:11,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:11,387 INFO L495 AbstractCegarLoop]: Abstraction has 55696 states and 63660 transitions. [2023-12-02 18:02:11,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 626.6666666666666) internal successors, (1880), 3 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 55696 states and 63660 transitions. [2023-12-02 18:02:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2046 [2023-12-02 18:02:11,465 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:11,467 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:11,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-12-02 18:02:11,467 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:02:11,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1837219801, now seen corresponding path program 1 times [2023-12-02 18:02:11,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:02:11,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053344420] [2023-12-02 18:02:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:11,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:02:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 511 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-02 18:02:12,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:02:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053344420] [2023-12-02 18:02:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053344420] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:12,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:02:12,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720913841] [2023-12-02 18:02:12,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:12,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:02:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:02:12,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:02:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:12,988 INFO L87 Difference]: Start difference. First operand 55696 states and 63660 transitions. Second operand has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:20,400 INFO L93 Difference]: Finished difference Result 134322 states and 156598 transitions. [2023-12-02 18:02:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:02:20,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2045 [2023-12-02 18:02:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:20,485 INFO L225 Difference]: With dead ends: 134322 [2023-12-02 18:02:20,485 INFO L226 Difference]: Without dead ends: 78628 [2023-12-02 18:02:20,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:20,517 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 1840 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4817 mSolverCounterSat, 2019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 6836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2019 IncrementalHoareTripleChecker+Valid, 4817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:20,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 1138 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2019 Valid, 4817 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-12-02 18:02:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78628 states. [2023-12-02 18:02:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78628 to 78628. [2023-12-02 18:02:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78628 states, 78627 states have (on average 1.1579101326516337) internal successors, (91043), 78627 states have internal predecessors, (91043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78628 states to 78628 states and 91043 transitions. [2023-12-02 18:02:21,341 INFO L78 Accepts]: Start accepts. Automaton has 78628 states and 91043 transitions. Word has length 2045 [2023-12-02 18:02:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:21,342 INFO L495 AbstractCegarLoop]: Abstraction has 78628 states and 91043 transitions. [2023-12-02 18:02:21,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 78628 states and 91043 transitions. [2023-12-02 18:02:21,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2060 [2023-12-02 18:02:21,432 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:21,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:21,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-12-02 18:02:21,434 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:02:21,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 782755362, now seen corresponding path program 1 times [2023-12-02 18:02:21,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:02:21,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303583672] [2023-12-02 18:02:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:21,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:02:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-12-02 18:02:23,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:02:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303583672] [2023-12-02 18:02:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303583672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:23,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:23,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:02:23,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690093382] [2023-12-02 18:02:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:23,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:02:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:02:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:02:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:23,174 INFO L87 Difference]: Start difference. First operand 78628 states and 91043 transitions. Second operand has 3 states, 3 states have (on average 639.0) internal successors, (1917), 3 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:31,045 INFO L93 Difference]: Finished difference Result 208032 states and 240903 transitions. [2023-12-02 18:02:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:02:31,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 639.0) internal successors, (1917), 3 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2059 [2023-12-02 18:02:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:31,193 INFO L225 Difference]: With dead ends: 208032 [2023-12-02 18:02:31,194 INFO L226 Difference]: Without dead ends: 129406 [2023-12-02 18:02:31,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:31,238 INFO L413 NwaCegarLoop]: 2830 mSDtfsCounter, 1612 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5063 mSolverCounterSat, 1923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 6986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1923 IncrementalHoareTripleChecker+Valid, 5063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:31,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 2842 Invalid, 6986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1923 Valid, 5063 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-12-02 18:02:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129406 states. [2023-12-02 18:02:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129406 to 124492. [2023-12-02 18:02:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124492 states, 124491 states have (on average 1.127350571527259) internal successors, (140345), 124491 states have internal predecessors, (140345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124492 states to 124492 states and 140345 transitions. [2023-12-02 18:02:33,030 INFO L78 Accepts]: Start accepts. Automaton has 124492 states and 140345 transitions. Word has length 2059 [2023-12-02 18:02:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:33,030 INFO L495 AbstractCegarLoop]: Abstraction has 124492 states and 140345 transitions. [2023-12-02 18:02:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 639.0) internal successors, (1917), 3 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 124492 states and 140345 transitions. [2023-12-02 18:02:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2077 [2023-12-02 18:02:33,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:33,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 18:02:33,254 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:02:33,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1821930724, now seen corresponding path program 1 times [2023-12-02 18:02:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:02:33,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429777047] [2023-12-02 18:02:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:02:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 625 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-12-02 18:02:36,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:02:36,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429777047] [2023-12-02 18:02:36,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429777047] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:36,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:36,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:02:36,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333184011] [2023-12-02 18:02:36,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:36,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:02:36,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:02:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:02:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:36,300 INFO L87 Difference]: Start difference. First operand 124492 states and 140345 transitions. Second operand has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:43,273 INFO L93 Difference]: Finished difference Result 252258 states and 284078 transitions. [2023-12-02 18:02:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:02:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2076 [2023-12-02 18:02:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:43,421 INFO L225 Difference]: With dead ends: 252258 [2023-12-02 18:02:43,421 INFO L226 Difference]: Without dead ends: 127768 [2023-12-02 18:02:43,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:43,465 INFO L413 NwaCegarLoop]: 3019 mSDtfsCounter, 1610 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5452 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 5452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:43,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 3031 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 5452 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 18:02:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127768 states. [2023-12-02 18:02:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127768 to 126130. [2023-12-02 18:02:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126130 states, 126129 states have (on average 1.1239366045873669) internal successors, (141761), 126129 states have internal predecessors, (141761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126130 states to 126130 states and 141761 transitions. [2023-12-02 18:02:45,373 INFO L78 Accepts]: Start accepts. Automaton has 126130 states and 141761 transitions. Word has length 2076 [2023-12-02 18:02:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:45,375 INFO L495 AbstractCegarLoop]: Abstraction has 126130 states and 141761 transitions. [2023-12-02 18:02:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 632.6666666666666) internal successors, (1898), 3 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 126130 states and 141761 transitions. [2023-12-02 18:02:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2140 [2023-12-02 18:02:45,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:45,588 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:45,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-12-02 18:02:45,589 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:02:45,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:45,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1058131919, now seen corresponding path program 1 times [2023-12-02 18:02:45,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:02:45,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195378087] [2023-12-02 18:02:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:45,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:02:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 728 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-12-02 18:02:47,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:02:47,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195378087] [2023-12-02 18:02:47,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195378087] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:47,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:47,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:02:47,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069748761] [2023-12-02 18:02:47,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:47,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:02:47,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:02:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:02:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:47,426 INFO L87 Difference]: Start difference. First operand 126130 states and 141761 transitions. Second operand has 3 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:55,050 INFO L93 Difference]: Finished difference Result 291570 states and 329221 transitions. [2023-12-02 18:02:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:02:55,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2139 [2023-12-02 18:02:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:55,248 INFO L225 Difference]: With dead ends: 291570 [2023-12-02 18:02:55,248 INFO L226 Difference]: Without dead ends: 165442 [2023-12-02 18:02:55,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:55,278 INFO L413 NwaCegarLoop]: 2202 mSDtfsCounter, 1774 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5393 mSolverCounterSat, 1417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 6810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1417 IncrementalHoareTripleChecker+Valid, 5393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:55,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1774 Valid, 2214 Invalid, 6810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1417 Valid, 5393 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-12-02 18:02:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165442 states. [2023-12-02 18:02:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165442 to 165442. [2023-12-02 18:02:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165442 states, 165441 states have (on average 1.094214856051402) internal successors, (181028), 165441 states have internal predecessors, (181028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165442 states to 165442 states and 181028 transitions. [2023-12-02 18:02:57,458 INFO L78 Accepts]: Start accepts. Automaton has 165442 states and 181028 transitions. Word has length 2139 [2023-12-02 18:02:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:57,459 INFO L495 AbstractCegarLoop]: Abstraction has 165442 states and 181028 transitions. [2023-12-02 18:02:57,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 629.6666666666666) internal successors, (1889), 3 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:02:57,460 INFO L276 IsEmpty]: Start isEmpty. Operand 165442 states and 181028 transitions. [2023-12-02 18:02:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2307 [2023-12-02 18:02:57,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:57,618 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 2, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:57,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-12-02 18:02:57,618 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:02:57,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1251455739, now seen corresponding path program 1 times [2023-12-02 18:02:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:02:57,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459104371] [2023-12-02 18:02:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:57,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:02:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 1049 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-12-02 18:02:59,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:02:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459104371] [2023-12-02 18:02:59,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459104371] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:59,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:59,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:02:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070996919] [2023-12-02 18:02:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:59,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:02:59,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:02:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:02:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:02:59,705 INFO L87 Difference]: Start difference. First operand 165442 states and 181028 transitions. Second operand has 3 states, 3 states have (on average 643.6666666666666) internal successors, (1931), 3 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:07,479 INFO L93 Difference]: Finished difference Result 393126 states and 428301 transitions. [2023-12-02 18:03:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:03:07,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 643.6666666666666) internal successors, (1931), 3 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2306 [2023-12-02 18:03:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:07,751 INFO L225 Difference]: With dead ends: 393126 [2023-12-02 18:03:07,752 INFO L226 Difference]: Without dead ends: 216220 [2023-12-02 18:03:07,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:07,804 INFO L413 NwaCegarLoop]: 2908 mSDtfsCounter, 1702 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4664 mSolverCounterSat, 1622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 2920 SdHoareTripleChecker+Invalid, 6286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1622 IncrementalHoareTripleChecker+Valid, 4664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:07,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1702 Valid, 2920 Invalid, 6286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1622 Valid, 4664 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-12-02 18:03:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216220 states. [2023-12-02 18:03:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216220 to 214582. [2023-12-02 18:03:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214582 states, 214581 states have (on average 1.0414388971996589) internal successors, (223473), 214581 states have internal predecessors, (223473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214582 states to 214582 states and 223473 transitions. [2023-12-02 18:03:10,813 INFO L78 Accepts]: Start accepts. Automaton has 214582 states and 223473 transitions. Word has length 2306 [2023-12-02 18:03:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:10,814 INFO L495 AbstractCegarLoop]: Abstraction has 214582 states and 223473 transitions. [2023-12-02 18:03:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 643.6666666666666) internal successors, (1931), 3 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 214582 states and 223473 transitions. [2023-12-02 18:03:10,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2320 [2023-12-02 18:03:10,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:10,993 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-12-02 18:03:10,993 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:03:10,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1717534838, now seen corresponding path program 1 times [2023-12-02 18:03:10,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:03:10,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054689541] [2023-12-02 18:03:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:10,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:03:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1585 backedges. 1281 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-12-02 18:03:13,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:03:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054689541] [2023-12-02 18:03:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054689541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:03:13,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:03:13,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:03:13,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924826848] [2023-12-02 18:03:13,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:03:13,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:03:13,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:03:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:03:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:13,065 INFO L87 Difference]: Start difference. First operand 214582 states and 223473 transitions. Second operand has 3 states, 3 states have (on average 684.3333333333334) internal successors, (2053), 3 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:19,860 INFO L93 Difference]: Finished difference Result 438990 states and 456977 transitions. [2023-12-02 18:03:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:03:19,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 684.3333333333334) internal successors, (2053), 3 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2319 [2023-12-02 18:03:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:20,153 INFO L225 Difference]: With dead ends: 438990 [2023-12-02 18:03:20,153 INFO L226 Difference]: Without dead ends: 224410 [2023-12-02 18:03:20,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:20,232 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1496 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 4942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 4392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:20,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1496 Valid, 561 Invalid, 4942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 4392 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-02 18:03:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224410 states. [2023-12-02 18:03:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224410 to 216220. [2023-12-02 18:03:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216220 states, 216219 states have (on average 1.0375313917833309) internal successors, (224334), 216219 states have internal predecessors, (224334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216220 states to 216220 states and 224334 transitions. [2023-12-02 18:03:23,226 INFO L78 Accepts]: Start accepts. Automaton has 216220 states and 224334 transitions. Word has length 2319 [2023-12-02 18:03:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:23,227 INFO L495 AbstractCegarLoop]: Abstraction has 216220 states and 224334 transitions. [2023-12-02 18:03:23,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 684.3333333333334) internal successors, (2053), 3 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 216220 states and 224334 transitions. [2023-12-02 18:03:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2646 [2023-12-02 18:03:23,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:23,780 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:23,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-12-02 18:03:23,781 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:03:23,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1884074674, now seen corresponding path program 1 times [2023-12-02 18:03:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:03:23,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25250361] [2023-12-02 18:03:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:23,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:03:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2961 backedges. 2188 proven. 0 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2023-12-02 18:03:26,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:03:26,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25250361] [2023-12-02 18:03:26,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25250361] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:03:26,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:03:26,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:03:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096136149] [2023-12-02 18:03:26,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:03:26,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:03:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:03:26,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:03:26,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:26,189 INFO L87 Difference]: Start difference. First operand 216220 states and 224334 transitions. Second operand has 3 states, 3 states have (on average 701.3333333333334) internal successors, (2104), 3 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:32,835 INFO L93 Difference]: Finished difference Result 443904 states and 462029 transitions. [2023-12-02 18:03:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:03:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 701.3333333333334) internal successors, (2104), 3 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2645 [2023-12-02 18:03:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:33,126 INFO L225 Difference]: With dead ends: 443904 [2023-12-02 18:03:33,126 INFO L226 Difference]: Without dead ends: 227686 [2023-12-02 18:03:33,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:33,219 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1462 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4340 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 5337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 4340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:33,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 442 Invalid, 5337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 4340 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-02 18:03:33,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227686 states. [2023-12-02 18:03:35,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227686 to 226048. [2023-12-02 18:03:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226048 states, 226047 states have (on average 1.036421629130225) internal successors, (234280), 226047 states have internal predecessors, (234280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226048 states to 226048 states and 234280 transitions. [2023-12-02 18:03:36,310 INFO L78 Accepts]: Start accepts. Automaton has 226048 states and 234280 transitions. Word has length 2645 [2023-12-02 18:03:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:36,311 INFO L495 AbstractCegarLoop]: Abstraction has 226048 states and 234280 transitions. [2023-12-02 18:03:36,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 701.3333333333334) internal successors, (2104), 3 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 226048 states and 234280 transitions. [2023-12-02 18:03:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2774 [2023-12-02 18:03:36,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:36,845 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:36,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-12-02 18:03:36,846 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:03:36,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:36,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1753989387, now seen corresponding path program 1 times [2023-12-02 18:03:36,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:03:36,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484852078] [2023-12-02 18:03:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:36,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:03:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 1352 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-12-02 18:03:41,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:03:41,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484852078] [2023-12-02 18:03:41,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484852078] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:03:41,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:03:41,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:03:41,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214028769] [2023-12-02 18:03:41,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:03:41,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:03:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:03:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:03:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:41,743 INFO L87 Difference]: Start difference. First operand 226048 states and 234280 transitions. Second operand has 3 states, 3 states have (on average 883.0) internal successors, (2649), 3 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:48,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:48,525 INFO L93 Difference]: Finished difference Result 509424 states and 527283 transitions. [2023-12-02 18:03:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:03:48,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 883.0) internal successors, (2649), 3 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2773 [2023-12-02 18:03:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:48,877 INFO L225 Difference]: With dead ends: 509424 [2023-12-02 18:03:48,877 INFO L226 Difference]: Without dead ends: 283378 [2023-12-02 18:03:48,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:48,930 INFO L413 NwaCegarLoop]: 2285 mSDtfsCounter, 740 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 5020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 4506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:48,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 2297 Invalid, 5020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 4506 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 18:03:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283378 states. [2023-12-02 18:03:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283378 to 276826. [2023-12-02 18:03:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276826 states, 276825 states have (on average 1.031008760046961) internal successors, (285409), 276825 states have internal predecessors, (285409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276826 states to 276826 states and 285409 transitions. [2023-12-02 18:03:52,329 INFO L78 Accepts]: Start accepts. Automaton has 276826 states and 285409 transitions. Word has length 2773 [2023-12-02 18:03:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:52,330 INFO L495 AbstractCegarLoop]: Abstraction has 276826 states and 285409 transitions. [2023-12-02 18:03:52,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 883.0) internal successors, (2649), 3 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:03:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 276826 states and 285409 transitions. [2023-12-02 18:03:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2954 [2023-12-02 18:03:53,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:53,053 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:53,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-12-02 18:03:53,054 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:03:53,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1840442901, now seen corresponding path program 1 times [2023-12-02 18:03:53,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:03:53,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902209201] [2023-12-02 18:03:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:03:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 2789 proven. 0 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2023-12-02 18:03:56,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:03:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902209201] [2023-12-02 18:03:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902209201] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:03:56,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:03:56,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:03:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644692087] [2023-12-02 18:03:56,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:03:56,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:03:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:03:56,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:03:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:03:56,179 INFO L87 Difference]: Start difference. First operand 276826 states and 285409 transitions. Second operand has 3 states, 3 states have (on average 679.6666666666666) internal successors, (2039), 3 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:04:03,177 INFO L93 Difference]: Finished difference Result 566754 states and 583977 transitions. [2023-12-02 18:04:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:04:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 679.6666666666666) internal successors, (2039), 3 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2953 [2023-12-02 18:04:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:04:03,539 INFO L225 Difference]: With dead ends: 566754 [2023-12-02 18:04:03,540 INFO L226 Difference]: Without dead ends: 276826 [2023-12-02 18:04:03,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:04:03,637 INFO L413 NwaCegarLoop]: 1891 mSDtfsCounter, 1634 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:04:03,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 1902 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 18:04:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276826 states. [2023-12-02 18:04:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276826 to 276826. [2023-12-02 18:04:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276826 states, 276825 states have (on average 1.0238056533911315) internal successors, (283415), 276825 states have internal predecessors, (283415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276826 states to 276826 states and 283415 transitions. [2023-12-02 18:04:07,547 INFO L78 Accepts]: Start accepts. Automaton has 276826 states and 283415 transitions. Word has length 2953 [2023-12-02 18:04:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:04:07,548 INFO L495 AbstractCegarLoop]: Abstraction has 276826 states and 283415 transitions. [2023-12-02 18:04:07,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 679.6666666666666) internal successors, (2039), 3 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 276826 states and 283415 transitions. [2023-12-02 18:04:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3033 [2023-12-02 18:04:07,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:04:07,828 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:04:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-12-02 18:04:07,829 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:04:07,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:04:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash -949301397, now seen corresponding path program 1 times [2023-12-02 18:04:07,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:04:07,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725945813] [2023-12-02 18:04:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:07,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:04:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4474 backedges. 3287 proven. 0 refuted. 0 times theorem prover too weak. 1187 trivial. 0 not checked. [2023-12-02 18:04:12,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:04:12,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725945813] [2023-12-02 18:04:12,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725945813] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:04:12,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:04:12,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:04:12,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608228805] [2023-12-02 18:04:12,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:04:12,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:04:12,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:04:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:04:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:04:12,480 INFO L87 Difference]: Start difference. First operand 276826 states and 283415 transitions. Second operand has 3 states, 3 states have (on average 705.3333333333334) internal successors, (2116), 3 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:04:18,828 INFO L93 Difference]: Finished difference Result 553650 states and 566828 transitions. [2023-12-02 18:04:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:04:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 705.3333333333334) internal successors, (2116), 3 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3032 [2023-12-02 18:04:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:04:19,185 INFO L225 Difference]: With dead ends: 553650 [2023-12-02 18:04:19,185 INFO L226 Difference]: Without dead ends: 276826 [2023-12-02 18:04:19,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:04:19,280 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 1471 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4055 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 4504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 4055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:04:19,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 489 Invalid, 4504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 4055 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 18:04:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276826 states. [2023-12-02 18:04:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276826 to 276826. [2023-12-02 18:04:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276826 states, 276825 states have (on average 1.0237261808001445) internal successors, (283393), 276825 states have internal predecessors, (283393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276826 states to 276826 states and 283393 transitions. [2023-12-02 18:04:23,178 INFO L78 Accepts]: Start accepts. Automaton has 276826 states and 283393 transitions. Word has length 3032 [2023-12-02 18:04:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:04:23,179 INFO L495 AbstractCegarLoop]: Abstraction has 276826 states and 283393 transitions. [2023-12-02 18:04:23,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 705.3333333333334) internal successors, (2116), 3 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 276826 states and 283393 transitions. [2023-12-02 18:04:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3048 [2023-12-02 18:04:23,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:04:23,480 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:04:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-12-02 18:04:23,481 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:04:23,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:04:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash 487796840, now seen corresponding path program 1 times [2023-12-02 18:04:23,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:04:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171964930] [2023-12-02 18:04:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:23,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:04:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 2530 proven. 10 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2023-12-02 18:04:31,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:04:31,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171964930] [2023-12-02 18:04:31,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171964930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:04:31,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971794108] [2023-12-02 18:04:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:31,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:04:31,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:04:31,458 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:04:31,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 18:04:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:32,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 3434 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:04:32,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:04:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3497 backedges. 2625 proven. 0 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2023-12-02 18:04:32,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:04:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971794108] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:04:32,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:04:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-12-02 18:04:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620152182] [2023-12-02 18:04:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:04:32,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:04:32,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:04:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:04:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:04:32,933 INFO L87 Difference]: Start difference. First operand 276826 states and 283393 transitions. Second operand has 3 states, 3 states have (on average 786.0) internal successors, (2358), 3 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:04:39,334 INFO L93 Difference]: Finished difference Result 555288 states and 568569 transitions. [2023-12-02 18:04:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:04:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 786.0) internal successors, (2358), 3 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3047 [2023-12-02 18:04:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:04:39,693 INFO L225 Difference]: With dead ends: 555288 [2023-12-02 18:04:39,693 INFO L226 Difference]: Without dead ends: 278464 [2023-12-02 18:04:39,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3053 GetRequests, 3046 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:04:39,809 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1535 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 4999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:04:39,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1535 Valid, 304 Invalid, 4999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 4215 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 18:04:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278464 states. [2023-12-02 18:04:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278464 to 278464. [2023-12-02 18:04:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278464 states, 278463 states have (on average 1.0209543099083183) internal successors, (284298), 278463 states have internal predecessors, (284298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278464 states to 278464 states and 284298 transitions. [2023-12-02 18:04:43,331 INFO L78 Accepts]: Start accepts. Automaton has 278464 states and 284298 transitions. Word has length 3047 [2023-12-02 18:04:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:04:43,332 INFO L495 AbstractCegarLoop]: Abstraction has 278464 states and 284298 transitions. [2023-12-02 18:04:43,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 786.0) internal successors, (2358), 3 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 278464 states and 284298 transitions. [2023-12-02 18:04:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3107 [2023-12-02 18:04:43,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:04:43,618 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:04:43,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 18:04:43,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 18:04:43,819 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:04:43,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:04:43,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1320543691, now seen corresponding path program 1 times [2023-12-02 18:04:43,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:04:43,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117549172] [2023-12-02 18:04:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:43,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:04:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 2685 proven. 0 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2023-12-02 18:04:48,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:04:48,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117549172] [2023-12-02 18:04:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117549172] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:04:48,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:04:48,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:04:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064632737] [2023-12-02 18:04:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:04:48,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:04:48,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:04:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:04:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:04:48,870 INFO L87 Difference]: Start difference. First operand 278464 states and 284298 transitions. Second operand has 4 states, 4 states have (on average 605.25) internal successors, (2421), 3 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:04:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:04:58,238 INFO L93 Difference]: Finished difference Result 558564 states and 570322 transitions. [2023-12-02 18:04:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:04:58,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 605.25) internal successors, (2421), 3 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3106 [2023-12-02 18:04:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:04:58,626 INFO L225 Difference]: With dead ends: 558564 [2023-12-02 18:04:58,626 INFO L226 Difference]: Without dead ends: 280102 [2023-12-02 18:04:58,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:04:58,745 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 3109 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7462 mSolverCounterSat, 1372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3109 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 8834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1372 IncrementalHoareTripleChecker+Valid, 7462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:04:58,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3109 Valid, 253 Invalid, 8834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1372 Valid, 7462 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-12-02 18:04:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280102 states. [2023-12-02 18:05:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280102 to 280102. [2023-12-02 18:05:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280102 states, 280101 states have (on average 1.0194893984669815) internal successors, (285560), 280101 states have internal predecessors, (285560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:05:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280102 states to 280102 states and 285560 transitions. [2023-12-02 18:05:02,059 INFO L78 Accepts]: Start accepts. Automaton has 280102 states and 285560 transitions. Word has length 3106 [2023-12-02 18:05:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:02,060 INFO L495 AbstractCegarLoop]: Abstraction has 280102 states and 285560 transitions. [2023-12-02 18:05:02,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 605.25) internal successors, (2421), 3 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:05:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 280102 states and 285560 transitions. [2023-12-02 18:05:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3186 [2023-12-02 18:05:02,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:02,782 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:02,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-12-02 18:05:02,782 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash -165593826, now seen corresponding path program 1 times [2023-12-02 18:05:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:02,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993293987] [2023-12-02 18:05:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 2950 proven. 10 refuted. 0 times theorem prover too weak. 1371 trivial. 0 not checked. [2023-12-02 18:05:10,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993293987] [2023-12-02 18:05:10,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993293987] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:05:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757241725] [2023-12-02 18:05:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:10,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:10,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:05:10,959 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:05:10,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 18:05:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:12,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 3604 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:05:12,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 2999 proven. 0 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2023-12-02 18:05:12,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:05:12,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757241725] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:12,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:05:12,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-12-02 18:05:12,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165430959] [2023-12-02 18:05:12,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:12,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:05:12,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:05:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:05:12,503 INFO L87 Difference]: Start difference. First operand 280102 states and 285560 transitions. Second operand has 3 states, 3 states have (on average 755.6666666666666) internal successors, (2267), 3 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:05:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:18,754 INFO L93 Difference]: Finished difference Result 561840 states and 573038 transitions. [2023-12-02 18:05:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:05:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 755.6666666666666) internal successors, (2267), 3 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3185 [2023-12-02 18:05:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:19,053 INFO L225 Difference]: With dead ends: 561840 [2023-12-02 18:05:19,053 INFO L226 Difference]: Without dead ends: 281740 [2023-12-02 18:05:19,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3191 GetRequests, 3184 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:05:19,196 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1595 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4093 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 5208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1115 IncrementalHoareTripleChecker+Valid, 4093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:19,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 174 Invalid, 5208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1115 Valid, 4093 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-02 18:05:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281740 states. [2023-12-02 18:05:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281740 to 281740. [2023-12-02 18:05:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281740 states, 281739 states have (on average 1.0191631261557683) internal successors, (287138), 281739 states have internal predecessors, (287138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:05:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281740 states to 281740 states and 287138 transitions. [2023-12-02 18:05:22,302 INFO L78 Accepts]: Start accepts. Automaton has 281740 states and 287138 transitions. Word has length 3185 [2023-12-02 18:05:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:22,303 INFO L495 AbstractCegarLoop]: Abstraction has 281740 states and 287138 transitions. [2023-12-02 18:05:22,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 755.6666666666666) internal successors, (2267), 3 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:05:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 281740 states and 287138 transitions. [2023-12-02 18:05:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3277 [2023-12-02 18:05:23,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:23,109 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:23,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 18:05:23,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91a62e1d-a77a-494d-835f-724f2f7a34d8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:23,318 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:05:23,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -139036149, now seen corresponding path program 1 times [2023-12-02 18:05:23,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:05:23,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288532670] [2023-12-02 18:05:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:05:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 2670 proven. 0 refuted. 0 times theorem prover too weak. 2094 trivial. 0 not checked. [2023-12-02 18:05:27,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:05:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288532670] [2023-12-02 18:05:27,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288532670] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:27,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:27,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:05:27,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799797014] [2023-12-02 18:05:27,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:27,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:05:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:05:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:05:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:05:27,534 INFO L87 Difference]: Start difference. First operand 281740 states and 287138 transitions. Second operand has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:05:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:33,978 INFO L93 Difference]: Finished difference Result 638826 states and 650854 transitions. [2023-12-02 18:05:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:05:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 644.3333333333334) internal successors, (1933), 3 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3276 [2023-12-02 18:05:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:34,371 INFO L225 Difference]: With dead ends: 638826 [2023-12-02 18:05:34,371 INFO L226 Difference]: Without dead ends: 357088 [2023-12-02 18:05:34,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:05:34,419 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 1627 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 5097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:34,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1627 Valid, 406 Invalid, 5097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [851 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 18:05:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357088 states.