./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/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_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/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_ddeace64-28fe-4a0f-adca-49c91199c9af/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 161f5eab054e94dd2ff7a7c46df9e7154542593f1f9d4de13027218e1f7c6216 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:29:46,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:29:46,444 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:29:46,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:29:46,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:29:46,481 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:29:46,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:29:46,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:29:46,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:29:46,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:29:46,492 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:29:46,493 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:29:46,493 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:29:46,494 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:29:46,494 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:29:46,495 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:29:46,495 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:29:46,496 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:29:46,496 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:29:46,497 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:29:46,497 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:29:46,498 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:29:46,499 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:29:46,499 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:29:46,500 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:29:46,500 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:29:46,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:29:46,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:29:46,501 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:29:46,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:29:46,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:29:46,503 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:29:46,503 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:29:46,503 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:29:46,504 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:29:46,504 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:29:46,504 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:29:46,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:29:46,505 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:29:46,505 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:29:46,505 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:29:46,505 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:29:46,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:29:46,506 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:29:46,506 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:29:46,506 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:29:46,506 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:29:46,506 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_ddeace64-28fe-4a0f-adca-49c91199c9af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 161f5eab054e94dd2ff7a7c46df9e7154542593f1f9d4de13027218e1f7c6216 [2023-12-02 14:29:46,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:29:46,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:29:46,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:29:46,743 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:29:46,744 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:29:46,745 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c [2023-12-02 14:29:49,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:29:49,972 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:29:49,973 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c [2023-12-02 14:29:50,011 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/data/3fe754758/f0769c23021b4d8d8042f06821d9fda7/FLAGb39d466ee [2023-12-02 14:29:50,023 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/data/3fe754758/f0769c23021b4d8d8042f06821d9fda7 [2023-12-02 14:29:50,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:29:50,025 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:29:50,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:29:50,027 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:29:50,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:29:50,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:29:50" (1/1) ... [2023-12-02 14:29:50,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a97ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:50, skipping insertion in model container [2023-12-02 14:29:50,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:29:50" (1/1) ... [2023-12-02 14:29:50,193 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:29:52,017 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_ddeace64-28fe-4a0f-adca-49c91199c9af/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[381679,381692] [2023-12-02 14:29:52,038 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_ddeace64-28fe-4a0f-adca-49c91199c9af/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[383339,383352] [2023-12-02 14:29:52,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:29:52,186 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:29:53,222 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_ddeace64-28fe-4a0f-adca-49c91199c9af/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[381679,381692] [2023-12-02 14:29:53,226 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_ddeace64-28fe-4a0f-adca-49c91199c9af/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[383339,383352] [2023-12-02 14:29:53,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:29:53,309 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:29:53,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53 WrapperNode [2023-12-02 14:29:53,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:29:53,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:29:53,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:29:53,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:29:53,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:53,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:53,675 INFO L138 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12688 [2023-12-02 14:29:53,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:29:53,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:29:53,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:29:53,677 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:29:53,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:53,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:53,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:53,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:53,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:53,984 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:54,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:54,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:54,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:29:54,116 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:29:54,116 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:29:54,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:29:54,117 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (1/1) ... [2023-12-02 14:29:54,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:29:54,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:29:54,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:29:54,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:29:54,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:29:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 14:29:54,229 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 14:29:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 14:29:54,229 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 14:29:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 14:29:54,231 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 14:29:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 14:29:54,231 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 14:29:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 14:29:54,231 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 14:29:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 14:29:54,232 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 14:29:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:29:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:29:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:29:54,343 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:29:54,346 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:30:01,670 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:30:03,475 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:30:03,475 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 14:30:03,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:30:03 BoogieIcfgContainer [2023-12-02 14:30:03,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:30:03,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:30:03,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:30:03,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:30:03,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:29:50" (1/3) ... [2023-12-02 14:30:03,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619860fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:30:03, skipping insertion in model container [2023-12-02 14:30:03,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:29:53" (2/3) ... [2023-12-02 14:30:03,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619860fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:30:03, skipping insertion in model container [2023-12-02 14:30:03,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:30:03" (3/3) ... [2023-12-02 14:30:03,487 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.03.cil-2.c [2023-12-02 14:30:03,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:30:03,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 14:30:03,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:30:03,596 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;@31582548, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:30:03,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 14:30:03,608 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 14:30:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 14:30:03,618 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:03,619 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 14:30:03,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:03,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash 557315859, now seen corresponding path program 1 times [2023-12-02 14:30:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:03,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287777849] [2023-12-02 14:30:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:03,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:03,950 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 14:30:03,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287777849] [2023-12-02 14:30:03,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287777849] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:03,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:30:03,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:30:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410207394] [2023-12-02 14:30:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:03,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:30:03,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:03,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:30:03,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:30:03,989 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 14:30:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:04,762 INFO L93 Difference]: Finished difference Result 3548 states and 6935 transitions. [2023-12-02 14:30:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:30:04,765 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 14:30:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:04,788 INFO L225 Difference]: With dead ends: 3548 [2023-12-02 14:30:04,788 INFO L226 Difference]: Without dead ends: 1811 [2023-12-02 14:30:04,796 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 14:30:04,800 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 3490 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:04,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 6436 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:30:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2023-12-02 14:30:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1810. [2023-12-02 14:30:04,905 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 14:30:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3500 transitions. [2023-12-02 14:30:04,916 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3500 transitions. Word has length 40 [2023-12-02 14:30:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:04,916 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 3500 transitions. [2023-12-02 14:30:04,916 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 14:30:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3500 transitions. [2023-12-02 14:30:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 14:30:04,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:04,922 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 14:30:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:30:04,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:04,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1850144082, now seen corresponding path program 1 times [2023-12-02 14:30:04,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:04,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145152948] [2023-12-02 14:30:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:04,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:05,116 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 14:30:05,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:05,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145152948] [2023-12-02 14:30:05,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145152948] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:05,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921693350] [2023-12-02 14:30:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:05,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:05,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:05,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:05,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:30:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:05,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:30:05,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:05,308 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 14:30:05,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:05,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921693350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:05,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:05,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:30:05,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292268787] [2023-12-02 14:30:05,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:05,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:05,312 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 14:30:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:05,739 INFO L93 Difference]: Finished difference Result 2131 states and 3949 transitions. [2023-12-02 14:30:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:05,740 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 14:30:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:05,753 INFO L225 Difference]: With dead ends: 2131 [2023-12-02 14:30:05,754 INFO L226 Difference]: Without dead ends: 1967 [2023-12-02 14:30:05,755 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 14:30:05,756 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 14:30:05,757 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 14:30:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2023-12-02 14:30:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1963. [2023-12-02 14:30:05,803 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 14:30:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 3705 transitions. [2023-12-02 14:30:05,812 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 3705 transitions. Word has length 74 [2023-12-02 14:30:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:05,813 INFO L495 AbstractCegarLoop]: Abstraction has 1963 states and 3705 transitions. [2023-12-02 14:30:05,813 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 14:30:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 3705 transitions. [2023-12-02 14:30:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 14:30:05,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:05,816 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 14:30:05,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:06,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:06,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash 957229484, now seen corresponding path program 1 times [2023-12-02 14:30:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:06,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043755237] [2023-12-02 14:30:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:06,154 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 14:30:06,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:06,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043755237] [2023-12-02 14:30:06,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043755237] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:06,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962910894] [2023-12-02 14:30:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:06,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:06,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:06,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:30:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:06,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:30:06,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:06,373 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 14:30:06,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962910894] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:06,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:06,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:30:06,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165777018] [2023-12-02 14:30:06,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:06,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:06,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:06,375 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 14:30:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:06,810 INFO L93 Difference]: Finished difference Result 2584 states and 4564 transitions. [2023-12-02 14:30:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:06,811 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 14:30:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:06,827 INFO L225 Difference]: With dead ends: 2584 [2023-12-02 14:30:06,827 INFO L226 Difference]: Without dead ends: 2267 [2023-12-02 14:30:06,829 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 14:30:06,830 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 3370 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 14:30:06,831 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 14:30:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2023-12-02 14:30:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2261. [2023-12-02 14:30:06,907 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 14:30:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 4099 transitions. [2023-12-02 14:30:06,921 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 4099 transitions. Word has length 74 [2023-12-02 14:30:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:06,922 INFO L495 AbstractCegarLoop]: Abstraction has 2261 states and 4099 transitions. [2023-12-02 14:30:06,922 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 14:30:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 4099 transitions. [2023-12-02 14:30:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 14:30:06,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:06,925 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 14:30:06,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:30:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:07,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:07,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash -475020818, now seen corresponding path program 1 times [2023-12-02 14:30:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129861184] [2023-12-02 14:30:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:07,463 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 14:30:07,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:07,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129861184] [2023-12-02 14:30:07,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129861184] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:07,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:30:07,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:30:07,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566443820] [2023-12-02 14:30:07,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:07,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:30:07,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:07,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:30:07,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:07,467 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 14:30:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:08,333 INFO L93 Difference]: Finished difference Result 3537 states and 5805 transitions. [2023-12-02 14:30:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:30:08,333 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 14:30:08,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:08,353 INFO L225 Difference]: With dead ends: 3537 [2023-12-02 14:30:08,353 INFO L226 Difference]: Without dead ends: 2923 [2023-12-02 14:30:08,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:30:08,357 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, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:08,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3567 Valid, 9460 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:30:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2023-12-02 14:30:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2825. [2023-12-02 14:30:08,477 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 14:30:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4831 transitions. [2023-12-02 14:30:08,492 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4831 transitions. Word has length 74 [2023-12-02 14:30:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:08,493 INFO L495 AbstractCegarLoop]: Abstraction has 2825 states and 4831 transitions. [2023-12-02 14:30:08,493 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 14:30:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4831 transitions. [2023-12-02 14:30:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 14:30:08,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:08,496 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 14:30:08,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:30:08,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:08,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -707344815, now seen corresponding path program 1 times [2023-12-02 14:30:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:08,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64421696] [2023-12-02 14:30:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:08,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:08,712 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 14:30:08,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:08,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64421696] [2023-12-02 14:30:08,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64421696] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:08,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694467661] [2023-12-02 14:30:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:08,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:08,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:08,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:30:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:08,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:30:08,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:08,874 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 14:30:08,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:08,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694467661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:08,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:08,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 14:30:08,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142044368] [2023-12-02 14:30:08,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:08,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:08,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:08,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:08,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:30:08,877 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 14:30:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:09,406 INFO L93 Difference]: Finished difference Result 3750 states and 6074 transitions. [2023-12-02 14:30:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:09,407 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 14:30:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:09,427 INFO L225 Difference]: With dead ends: 3750 [2023-12-02 14:30:09,428 INFO L226 Difference]: Without dead ends: 3140 [2023-12-02 14:30:09,431 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 14:30:09,432 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 47 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:09,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6372 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:30:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2023-12-02 14:30:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3009. [2023-12-02 14:30:09,555 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 14:30:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 5095 transitions. [2023-12-02 14:30:09,569 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 5095 transitions. Word has length 88 [2023-12-02 14:30:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:09,570 INFO L495 AbstractCegarLoop]: Abstraction has 3009 states and 5095 transitions. [2023-12-02 14:30:09,570 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 14:30:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 5095 transitions. [2023-12-02 14:30:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 14:30:09,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:09,576 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 14:30:09,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:09,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:09,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:09,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1287273197, now seen corresponding path program 1 times [2023-12-02 14:30:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:09,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649823532] [2023-12-02 14:30:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:09,885 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 14:30:09,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:09,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649823532] [2023-12-02 14:30:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649823532] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:09,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:30:09,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:30:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188531307] [2023-12-02 14:30:09,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:09,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:30:09,888 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 14:30:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:10,364 INFO L93 Difference]: Finished difference Result 5050 states and 7848 transitions. [2023-12-02 14:30:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:10,365 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 14:30:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:10,388 INFO L225 Difference]: With dead ends: 5050 [2023-12-02 14:30:10,388 INFO L226 Difference]: Without dead ends: 3687 [2023-12-02 14:30:10,393 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 14:30:10,394 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:10,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3362 Valid, 3287 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:30:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2023-12-02 14:30:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3673. [2023-12-02 14:30:10,545 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 14:30:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 5955 transitions. [2023-12-02 14:30:10,557 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 5955 transitions. Word has length 98 [2023-12-02 14:30:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:10,558 INFO L495 AbstractCegarLoop]: Abstraction has 3673 states and 5955 transitions. [2023-12-02 14:30:10,558 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 14:30:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 5955 transitions. [2023-12-02 14:30:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 14:30:10,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:10,565 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 14:30:10,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:30:10,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:10,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1106001270, now seen corresponding path program 1 times [2023-12-02 14:30:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:10,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191145393] [2023-12-02 14:30:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:10,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:10,669 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 14:30:10,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:10,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191145393] [2023-12-02 14:30:10,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191145393] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:10,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358284750] [2023-12-02 14:30:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:10,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:10,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:10,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:30:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:10,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:30:10,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:10,837 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 14:30:10,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:10,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358284750] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:10,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:10,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:30:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425371528] [2023-12-02 14:30:10,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:10,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:10,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:10,840 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 14:30:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:11,361 INFO L93 Difference]: Finished difference Result 5469 states and 8385 transitions. [2023-12-02 14:30:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:11,362 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 14:30:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:11,388 INFO L225 Difference]: With dead ends: 5469 [2023-12-02 14:30:11,389 INFO L226 Difference]: Without dead ends: 4107 [2023-12-02 14:30:11,394 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 14:30:11,395 INFO L413 NwaCegarLoop]: 3206 mSDtfsCounter, 56 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:11,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 6368 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:30:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2023-12-02 14:30:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3917. [2023-12-02 14:30:11,555 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 14:30:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 6311 transitions. [2023-12-02 14:30:11,567 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 6311 transitions. Word has length 112 [2023-12-02 14:30:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:11,567 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 6311 transitions. [2023-12-02 14:30:11,567 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 14:30:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 6311 transitions. [2023-12-02 14:30:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 14:30:11,575 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:11,575 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 14:30:11,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 14:30:11,778 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:11,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1078890614, now seen corresponding path program 2 times [2023-12-02 14:30:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849829723] [2023-12-02 14:30:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:11,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:11,937 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 14:30:11,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:11,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849829723] [2023-12-02 14:30:11,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849829723] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:11,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686137368] [2023-12-02 14:30:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:30:11,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:11,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:11,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:11,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:30:12,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 14:30:12,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:30:12,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:30:12,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:12,083 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 14:30:12,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:12,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686137368] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:12,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:12,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 14:30:12,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658280003] [2023-12-02 14:30:12,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:12,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:12,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:30:12,086 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 14:30:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:12,681 INFO L93 Difference]: Finished difference Result 5533 states and 8581 transitions. [2023-12-02 14:30:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:12,681 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 14:30:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:12,705 INFO L225 Difference]: With dead ends: 5533 [2023-12-02 14:30:12,705 INFO L226 Difference]: Without dead ends: 3927 [2023-12-02 14:30:12,711 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 14:30:12,711 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 106 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:12,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 6365 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:30:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2023-12-02 14:30:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3909. [2023-12-02 14:30:12,860 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 14:30:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 6263 transitions. [2023-12-02 14:30:12,872 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 6263 transitions. Word has length 112 [2023-12-02 14:30:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:12,872 INFO L495 AbstractCegarLoop]: Abstraction has 3909 states and 6263 transitions. [2023-12-02 14:30:12,873 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 14:30:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 6263 transitions. [2023-12-02 14:30:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 14:30:12,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:12,880 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 14:30:12,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:13,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:13,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:13,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1947764054, now seen corresponding path program 1 times [2023-12-02 14:30:13,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:13,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203606711] [2023-12-02 14:30:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:13,300 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 14:30:13,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:13,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203606711] [2023-12-02 14:30:13,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203606711] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:13,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802120784] [2023-12-02 14:30:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:13,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:13,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:13,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:30:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:13,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:30:13,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:13,464 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 14:30:13,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802120784] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:13,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:13,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 14:30:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800551622] [2023-12-02 14:30:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:30:13,467 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 14:30:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:13,906 INFO L93 Difference]: Finished difference Result 5871 states and 8842 transitions. [2023-12-02 14:30:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:13,907 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 14:30:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:13,923 INFO L225 Difference]: With dead ends: 5871 [2023-12-02 14:30:13,924 INFO L226 Difference]: Without dead ends: 4357 [2023-12-02 14:30:13,930 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 14:30:13,930 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 14:30:13,931 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 14:30:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2023-12-02 14:30:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4357. [2023-12-02 14:30:14,046 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 14:30:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4357 states to 4357 states and 6747 transitions. [2023-12-02 14:30:14,054 INFO L78 Accepts]: Start accepts. Automaton has 4357 states and 6747 transitions. Word has length 112 [2023-12-02 14:30:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:14,055 INFO L495 AbstractCegarLoop]: Abstraction has 4357 states and 6747 transitions. [2023-12-02 14:30:14,055 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 14:30:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4357 states and 6747 transitions. [2023-12-02 14:30:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 14:30:14,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:14,060 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 14:30:14,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:30:14,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:14,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:14,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 960141915, now seen corresponding path program 1 times [2023-12-02 14:30:14,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:14,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719786957] [2023-12-02 14:30:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:14,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:14,411 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 14:30:14,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719786957] [2023-12-02 14:30:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719786957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957181448] [2023-12-02 14:30:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:14,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:14,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:14,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:14,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:30:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:14,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:30:14,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:14,581 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 14:30:14,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:14,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957181448] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:14,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:14,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 14:30:14,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113206799] [2023-12-02 14:30:14,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:14,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:14,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:30:14,584 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 14:30:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:15,236 INFO L93 Difference]: Finished difference Result 8123 states and 11672 transitions. [2023-12-02 14:30:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:15,237 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 14:30:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:15,251 INFO L225 Difference]: With dead ends: 8123 [2023-12-02 14:30:15,251 INFO L226 Difference]: Without dead ends: 5413 [2023-12-02 14:30:15,258 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 14:30:15,258 INFO L413 NwaCegarLoop]: 3174 mSDtfsCounter, 52 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 14:30:15,259 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 14:30:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2023-12-02 14:30:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 4697. [2023-12-02 14:30:15,449 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 14:30:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7227 transitions. [2023-12-02 14:30:15,461 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7227 transitions. Word has length 113 [2023-12-02 14:30:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:15,461 INFO L495 AbstractCegarLoop]: Abstraction has 4697 states and 7227 transitions. [2023-12-02 14:30:15,461 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 14:30:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7227 transitions. [2023-12-02 14:30:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 14:30:15,470 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:15,470 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 14:30:15,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:30:15,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:15,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:15,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2025059508, now seen corresponding path program 1 times [2023-12-02 14:30:15,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:15,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847843544] [2023-12-02 14:30:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:15,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:15,853 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 14:30:15,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:15,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847843544] [2023-12-02 14:30:15,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847843544] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:15,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315166038] [2023-12-02 14:30:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:15,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:15,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:15,855 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:15,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:30:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:16,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:30:16,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:16,133 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 14:30:16,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:16,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315166038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:16,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:16,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 14:30:16,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284035999] [2023-12-02 14:30:16,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:16,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:30:16,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:16,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:30:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:30:16,136 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 14:30:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:17,140 INFO L93 Difference]: Finished difference Result 9151 states and 12967 transitions. [2023-12-02 14:30:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:30:17,140 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 14:30:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:17,158 INFO L225 Difference]: With dead ends: 9151 [2023-12-02 14:30:17,158 INFO L226 Difference]: Without dead ends: 6101 [2023-12-02 14:30:17,166 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 14:30:17,167 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 14:30:17,167 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 14:30:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2023-12-02 14:30:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 6099. [2023-12-02 14:30:17,443 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 14:30:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 8953 transitions. [2023-12-02 14:30:17,457 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 8953 transitions. Word has length 115 [2023-12-02 14:30:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:17,457 INFO L495 AbstractCegarLoop]: Abstraction has 6099 states and 8953 transitions. [2023-12-02 14:30:17,457 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 14:30:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 8953 transitions. [2023-12-02 14:30:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 14:30:17,470 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:17,471 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 14:30:17,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 14:30:17,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:17,671 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:17,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -341999803, now seen corresponding path program 1 times [2023-12-02 14:30:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:17,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087500571] [2023-12-02 14:30:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:17,742 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 14:30:17,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:17,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087500571] [2023-12-02 14:30:17,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087500571] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:17,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619723003] [2023-12-02 14:30:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:17,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:17,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:17,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:17,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:30:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:17,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:30:17,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:17,901 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 14:30:17,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:17,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619723003] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:17,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:17,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:30:17,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734432639] [2023-12-02 14:30:17,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:17,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:17,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:17,904 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 14:30:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:18,639 INFO L93 Difference]: Finished difference Result 10109 states and 14173 transitions. [2023-12-02 14:30:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:18,640 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 14:30:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:18,660 INFO L225 Difference]: With dead ends: 10109 [2023-12-02 14:30:18,660 INFO L226 Difference]: Without dead ends: 7139 [2023-12-02 14:30:18,669 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 14:30:18,669 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 59 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 14:30:18,670 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 14:30:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2023-12-02 14:30:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 6651. [2023-12-02 14:30:18,991 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 14:30:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6651 states to 6651 states and 9705 transitions. [2023-12-02 14:30:19,006 INFO L78 Accepts]: Start accepts. Automaton has 6651 states and 9705 transitions. Word has length 116 [2023-12-02 14:30:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:19,006 INFO L495 AbstractCegarLoop]: Abstraction has 6651 states and 9705 transitions. [2023-12-02 14:30:19,006 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 14:30:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6651 states and 9705 transitions. [2023-12-02 14:30:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 14:30:19,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:19,021 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 14:30:19,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:19,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:19,224 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:19,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:19,224 INFO L85 PathProgramCache]: Analyzing trace with hash -88651415, now seen corresponding path program 1 times [2023-12-02 14:30:19,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:19,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231452951] [2023-12-02 14:30:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:19,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:19,563 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 14:30:19,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231452951] [2023-12-02 14:30:19,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231452951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177175100] [2023-12-02 14:30:19,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:19,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:19,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:19,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:30:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:19,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 14:30:19,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:19,849 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 14:30:19,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:30:20,236 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 14:30:20,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177175100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:30:20,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104920102] [2023-12-02 14:30:20,258 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-12-02 14:30:20,258 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:30:20,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:30:20,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:30:20,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:30:27,752 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 67 for LOIs [2023-12-02 14:30:27,787 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 149 for LOIs [2023-12-02 14:30:27,941 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 67 for LOIs [2023-12-02 14:30:27,948 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 67 for LOIs [2023-12-02 14:30:27,981 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 94 for LOIs [2023-12-02 14:30:28,195 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 67 for LOIs [2023-12-02 14:30:29,081 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:30:41,642 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 14:30:41,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:30:41,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:30:41,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 16 [2023-12-02 14:30:41,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827193467] [2023-12-02 14:30:41,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:30:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 14:30:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 14:30:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3823, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 14:30:41,645 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 14:30:46,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:46,521 INFO L93 Difference]: Finished difference Result 17067 states and 23512 transitions. [2023-12-02 14:30:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-12-02 14:30:46,521 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 14:30:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:46,555 INFO L225 Difference]: With dead ends: 17067 [2023-12-02 14:30:46,556 INFO L226 Difference]: Without dead ends: 12063 [2023-12-02 14:30:46,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 361 SyntacticMatches, 10 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14175 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=2915, Invalid=30027, Unknown=0, NotChecked=0, Total=32942 [2023-12-02 14:30:46,582 INFO L413 NwaCegarLoop]: 3422 mSDtfsCounter, 10909 mSDsluCounter, 27185 mSDsCounter, 0 mSdLazyCounter, 4099 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10915 SdHoareTripleChecker+Valid, 30607 SdHoareTripleChecker+Invalid, 4398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 4099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:46,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10915 Valid, 30607 Invalid, 4398 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [299 Valid, 4099 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 14:30:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12063 states. [2023-12-02 14:30:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12063 to 9136. [2023-12-02 14:30:47,210 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 14:30:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 12582 transitions. [2023-12-02 14:30:47,229 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 12582 transitions. Word has length 122 [2023-12-02 14:30:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:47,229 INFO L495 AbstractCegarLoop]: Abstraction has 9136 states and 12582 transitions. [2023-12-02 14:30:47,230 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 14:30:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 12582 transitions. [2023-12-02 14:30:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 14:30:47,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:47,243 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 14:30:47,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:47,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 14:30:47,444 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:47,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:47,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1848582737, now seen corresponding path program 1 times [2023-12-02 14:30:47,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:47,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837335981] [2023-12-02 14:30:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:47,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:47,534 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 14:30:47,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:47,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837335981] [2023-12-02 14:30:47,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837335981] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:47,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656411649] [2023-12-02 14:30:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:47,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:47,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:47,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 14:30:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:47,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:30:47,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:47,700 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 14:30:47,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:47,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656411649] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:47,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:47,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 14:30:47,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22984193] [2023-12-02 14:30:47,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:47,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:47,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:47,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:47,703 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 14:30:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:48,468 INFO L93 Difference]: Finished difference Result 15494 states and 20661 transitions. [2023-12-02 14:30:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:48,468 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 14:30:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:48,486 INFO L225 Difference]: With dead ends: 15494 [2023-12-02 14:30:48,486 INFO L226 Difference]: Without dead ends: 10132 [2023-12-02 14:30:48,493 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 14:30:48,494 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:48,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 6386 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:30:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2023-12-02 14:30:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 9585. [2023-12-02 14:30:48,891 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 14:30:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9585 states to 9585 states and 13106 transitions. [2023-12-02 14:30:48,904 INFO L78 Accepts]: Start accepts. Automaton has 9585 states and 13106 transitions. Word has length 121 [2023-12-02 14:30:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:48,905 INFO L495 AbstractCegarLoop]: Abstraction has 9585 states and 13106 transitions. [2023-12-02 14:30:48,905 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 14:30:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 9585 states and 13106 transitions. [2023-12-02 14:30:48,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:30:48,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:48,913 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 14:30:48,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:49,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 14:30:49,114 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:49,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:49,114 INFO L85 PathProgramCache]: Analyzing trace with hash 40436318, now seen corresponding path program 1 times [2023-12-02 14:30:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:49,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135385474] [2023-12-02 14:30:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:49,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:49,249 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 14:30:49,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:49,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135385474] [2023-12-02 14:30:49,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135385474] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:49,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934230482] [2023-12-02 14:30:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:49,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:49,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:49,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:49,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 14:30:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:49,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:30:49,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:49,414 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 14:30:49,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:49,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934230482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:49,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:49,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 14:30:49,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136693879] [2023-12-02 14:30:49,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:49,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:30:49,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:30:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:30:49,416 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 14:30:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:50,109 INFO L93 Difference]: Finished difference Result 13384 states and 17841 transitions. [2023-12-02 14:30:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:30:50,110 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 14:30:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:50,131 INFO L225 Difference]: With dead ends: 13384 [2023-12-02 14:30:50,132 INFO L226 Difference]: Without dead ends: 9874 [2023-12-02 14:30:50,140 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 14:30:50,141 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3336 mSDsluCounter, 3301 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:50,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3336 Valid, 6506 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:30:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2023-12-02 14:30:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 9789. [2023-12-02 14:30:50,729 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 14:30:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9789 states to 9789 states and 13358 transitions. [2023-12-02 14:30:50,748 INFO L78 Accepts]: Start accepts. Automaton has 9789 states and 13358 transitions. Word has length 123 [2023-12-02 14:30:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:50,749 INFO L495 AbstractCegarLoop]: Abstraction has 9789 states and 13358 transitions. [2023-12-02 14:30:50,749 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 14:30:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9789 states and 13358 transitions. [2023-12-02 14:30:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 14:30:50,760 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:50,760 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 14:30:50,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 14:30:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 14:30:50,961 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:50,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1335676309, now seen corresponding path program 1 times [2023-12-02 14:30:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:50,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737219676] [2023-12-02 14:30:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:51,012 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 14:30:51,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737219676] [2023-12-02 14:30:51,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737219676] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497474045] [2023-12-02 14:30:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:51,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:51,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:51,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:51,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 14:30:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:51,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:30:51,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:51,164 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 14:30:51,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:51,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497474045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:51,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:51,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 14:30:51,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923717945] [2023-12-02 14:30:51,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:51,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:51,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:30:51,166 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 14:30:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:51,851 INFO L93 Difference]: Finished difference Result 13356 states and 17863 transitions. [2023-12-02 14:30:51,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:51,852 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 14:30:51,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:51,866 INFO L225 Difference]: With dead ends: 13356 [2023-12-02 14:30:51,866 INFO L226 Difference]: Without dead ends: 9522 [2023-12-02 14:30:51,873 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 14:30:51,873 INFO L413 NwaCegarLoop]: 3172 mSDtfsCounter, 22 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:51,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6328 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:30:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2023-12-02 14:30:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 9111. [2023-12-02 14:30:52,236 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 14:30:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 12530 transitions. [2023-12-02 14:30:52,249 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 12530 transitions. Word has length 124 [2023-12-02 14:30:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:52,249 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 12530 transitions. [2023-12-02 14:30:52,249 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 14:30:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 12530 transitions. [2023-12-02 14:30:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 14:30:52,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:52,258 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 14:30:52,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 14:30:52,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 14:30:52,458 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:52,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:52,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1053516124, now seen corresponding path program 1 times [2023-12-02 14:30:52,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:52,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962579387] [2023-12-02 14:30:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:52,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:52,598 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 14:30:52,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:52,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962579387] [2023-12-02 14:30:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962579387] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:52,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332338671] [2023-12-02 14:30:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:52,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:52,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:52,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:52,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 14:30:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:52,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:30:52,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:52,774 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 14:30:52,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:52,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332338671] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:52,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:52,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 14:30:52,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755321584] [2023-12-02 14:30:52,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:52,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:52,776 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 14:30:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:53,377 INFO L93 Difference]: Finished difference Result 14913 states and 19886 transitions. [2023-12-02 14:30:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:53,377 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 14:30:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:53,391 INFO L225 Difference]: With dead ends: 14913 [2023-12-02 14:30:53,391 INFO L226 Difference]: Without dead ends: 9611 [2023-12-02 14:30:53,399 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 14:30:53,400 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, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:53,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 3209 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:30:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2023-12-02 14:30:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9548. [2023-12-02 14:30:53,830 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 14:30:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9548 states to 9548 states and 13008 transitions. [2023-12-02 14:30:53,843 INFO L78 Accepts]: Start accepts. Automaton has 9548 states and 13008 transitions. Word has length 125 [2023-12-02 14:30:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:53,844 INFO L495 AbstractCegarLoop]: Abstraction has 9548 states and 13008 transitions. [2023-12-02 14:30:53,844 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 14:30:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 9548 states and 13008 transitions. [2023-12-02 14:30:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 14:30:53,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:53,851 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 14:30:53,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 14:30:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 14:30:54,052 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:54,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1159833574, now seen corresponding path program 1 times [2023-12-02 14:30:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812087450] [2023-12-02 14:30:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:54,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:54,099 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 14:30:54,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:54,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812087450] [2023-12-02 14:30:54,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812087450] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:54,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821953914] [2023-12-02 14:30:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:54,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:54,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:54,100 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:54,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 14:30:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:54,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:30:54,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:54,267 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 14:30:54,267 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:54,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821953914] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:54,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:54,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 14:30:54,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887228725] [2023-12-02 14:30:54,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:54,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:30:54,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:54,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:30:54,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:30:54,269 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 14:30:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:54,975 INFO L93 Difference]: Finished difference Result 15169 states and 20163 transitions. [2023-12-02 14:30:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:30:54,976 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 14:30:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:54,989 INFO L225 Difference]: With dead ends: 15169 [2023-12-02 14:30:54,989 INFO L226 Difference]: Without dead ends: 9545 [2023-12-02 14:30:54,998 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 14:30:54,998 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:54,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6395 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:30:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2023-12-02 14:30:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 9415. [2023-12-02 14:30:55,406 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 14:30:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9415 states to 9415 states and 12658 transitions. [2023-12-02 14:30:55,420 INFO L78 Accepts]: Start accepts. Automaton has 9415 states and 12658 transitions. Word has length 125 [2023-12-02 14:30:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:55,420 INFO L495 AbstractCegarLoop]: Abstraction has 9415 states and 12658 transitions. [2023-12-02 14:30:55,420 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 14:30:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9415 states and 12658 transitions. [2023-12-02 14:30:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 14:30:55,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:55,428 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 14:30:55,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 14:30:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 14:30:55,629 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:55,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1942619604, now seen corresponding path program 1 times [2023-12-02 14:30:55,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:55,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26787967] [2023-12-02 14:30:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:55,816 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 14:30:55,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:55,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26787967] [2023-12-02 14:30:55,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26787967] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:55,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217832153] [2023-12-02 14:30:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:55,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:55,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:55,818 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:55,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 14:30:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:55,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 14:30:55,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:56,015 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 14:30:56,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:56,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217832153] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:56,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:56,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 14:30:56,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526520437] [2023-12-02 14:30:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:56,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:30:56,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:56,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:30:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:30:56,017 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 14:30:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:57,242 INFO L93 Difference]: Finished difference Result 16303 states and 21121 transitions. [2023-12-02 14:30:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:30:57,243 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 14:30:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:57,257 INFO L225 Difference]: With dead ends: 16303 [2023-12-02 14:30:57,258 INFO L226 Difference]: Without dead ends: 11070 [2023-12-02 14:30:57,265 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 14:30:57,266 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 192 mSDsluCounter, 12513 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:57,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 15741 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:30:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11070 states. [2023-12-02 14:30:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11070 to 10005. [2023-12-02 14:30:57,723 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 14:30:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 13354 transitions. [2023-12-02 14:30:57,736 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 13354 transitions. Word has length 127 [2023-12-02 14:30:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:57,737 INFO L495 AbstractCegarLoop]: Abstraction has 10005 states and 13354 transitions. [2023-12-02 14:30:57,737 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 14:30:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 13354 transitions. [2023-12-02 14:30:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 14:30:57,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:57,744 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 14:30:57,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 14:30:57,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:57,945 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:57,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1145098455, now seen corresponding path program 1 times [2023-12-02 14:30:57,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:57,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701581463] [2023-12-02 14:30:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:57,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:58,130 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 14:30:58,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:58,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701581463] [2023-12-02 14:30:58,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701581463] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:58,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205587595] [2023-12-02 14:30:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:58,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:58,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:58,132 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:58,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 14:30:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:58,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 14:30:58,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:58,515 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 14:30:58,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:30:58,690 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 14:30:58,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205587595] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:58,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:30:58,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8] total 17 [2023-12-02 14:30:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928870304] [2023-12-02 14:30:58,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:58,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:30:58,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:58,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:30:58,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:30:58,692 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 14:30:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:59,615 INFO L93 Difference]: Finished difference Result 14795 states and 19249 transitions. [2023-12-02 14:30:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:30:59,616 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 14:30:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:59,628 INFO L225 Difference]: With dead ends: 14795 [2023-12-02 14:30:59,628 INFO L226 Difference]: Without dead ends: 10429 [2023-12-02 14:30:59,633 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 14:30:59,634 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 3366 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 14:30:59,634 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 14:30:59,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10429 states. [2023-12-02 14:31:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10429 to 10360. [2023-12-02 14:31:00,107 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 14:31:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10360 states to 10360 states and 13678 transitions. [2023-12-02 14:31:00,120 INFO L78 Accepts]: Start accepts. Automaton has 10360 states and 13678 transitions. Word has length 122 [2023-12-02 14:31:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:00,121 INFO L495 AbstractCegarLoop]: Abstraction has 10360 states and 13678 transitions. [2023-12-02 14:31:00,121 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 14:31:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 10360 states and 13678 transitions. [2023-12-02 14:31:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 14:31:00,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:00,126 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 14:31:00,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 14:31:00,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-12-02 14:31:00,326 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:00,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1550708604, now seen corresponding path program 1 times [2023-12-02 14:31:00,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:00,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622722182] [2023-12-02 14:31:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:00,559 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 14:31:00,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:00,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622722182] [2023-12-02 14:31:00,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622722182] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:00,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279476464] [2023-12-02 14:31:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:00,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:00,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:00,561 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:00,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 14:31:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:00,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:31:00,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:00,877 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 14:31:00,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:01,194 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 14:31:01,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279476464] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:31:01,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991311576] [2023-12-02 14:31:01,198 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2023-12-02 14:31:01,198 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:31:01,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:31:01,199 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:31:01,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:31:07,127 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2023-12-02 14:31:07,269 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 151 for LOIs [2023-12-02 14:31:07,421 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 68 for LOIs [2023-12-02 14:31:07,428 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 68 for LOIs [2023-12-02 14:31:07,462 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 95 for LOIs [2023-12-02 14:31:07,631 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2023-12-02 14:31:08,140 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:19,980 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 14:31:19,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:19,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:31:19,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2023-12-02 14:31:19,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088114123] [2023-12-02 14:31:19,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:19,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 14:31:19,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 14:31:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=4736, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 14:31:19,983 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 14:31:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:26,624 INFO L93 Difference]: Finished difference Result 24579 states and 31858 transitions. [2023-12-02 14:31:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2023-12-02 14:31:26,625 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 14:31:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:26,645 INFO L225 Difference]: With dead ends: 24579 [2023-12-02 14:31:26,645 INFO L226 Difference]: Without dead ends: 16853 [2023-12-02 14:31:26,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 427 SyntacticMatches, 3 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31650 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5819, Invalid=64141, Unknown=0, NotChecked=0, Total=69960 [2023-12-02 14:31:26,661 INFO L413 NwaCegarLoop]: 3611 mSDtfsCounter, 12028 mSDsluCounter, 22149 mSDsCounter, 0 mSdLazyCounter, 4573 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:26,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12040 Valid, 25760 Invalid, 5003 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [430 Valid, 4573 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 14:31:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16853 states. [2023-12-02 14:31:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16853 to 8275. [2023-12-02 14:31:27,170 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 14:31:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 11154 transitions. [2023-12-02 14:31:27,181 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 11154 transitions. Word has length 127 [2023-12-02 14:31:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:27,182 INFO L495 AbstractCegarLoop]: Abstraction has 8275 states and 11154 transitions. [2023-12-02 14:31:27,182 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 14:31:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 11154 transitions. [2023-12-02 14:31:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:31:27,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:27,185 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 14:31:27,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 14:31:27,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 14:31:27,386 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:27,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1366880057, now seen corresponding path program 1 times [2023-12-02 14:31:27,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:27,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550401327] [2023-12-02 14:31:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:27,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:27,557 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 14:31:27,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:27,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550401327] [2023-12-02 14:31:27,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550401327] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:27,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:31:27,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:31:27,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131154966] [2023-12-02 14:31:27,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:31:27,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:27,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:31:27,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:31:27,560 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 14:31:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:28,749 INFO L93 Difference]: Finished difference Result 13152 states and 16977 transitions. [2023-12-02 14:31:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:31:28,749 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 14:31:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:28,761 INFO L225 Difference]: With dead ends: 13152 [2023-12-02 14:31:28,761 INFO L226 Difference]: Without dead ends: 9624 [2023-12-02 14:31:28,764 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 14:31:28,764 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 83 mSDsluCounter, 6320 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 14:31:28,764 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 14:31:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9624 states. [2023-12-02 14:31:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9624 to 9227. [2023-12-02 14:31:29,341 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 14:31:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9227 states to 9227 states and 12293 transitions. [2023-12-02 14:31:29,353 INFO L78 Accepts]: Start accepts. Automaton has 9227 states and 12293 transitions. Word has length 123 [2023-12-02 14:31:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:29,354 INFO L495 AbstractCegarLoop]: Abstraction has 9227 states and 12293 transitions. [2023-12-02 14:31:29,354 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 14:31:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 9227 states and 12293 transitions. [2023-12-02 14:31:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 14:31:29,357 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:29,358 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 14:31:29,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 14:31:29,358 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:29,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1440127006, now seen corresponding path program 1 times [2023-12-02 14:31:29,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:29,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912261253] [2023-12-02 14:31:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:29,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:29,575 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 14:31:29,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:29,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912261253] [2023-12-02 14:31:29,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912261253] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:29,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788854081] [2023-12-02 14:31:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:29,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:29,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:29,577 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:29,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 14:31:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:29,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 14:31:29,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:29,900 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 14:31:29,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:30,153 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 14:31:30,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788854081] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:31:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551438563] [2023-12-02 14:31:30,157 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-12-02 14:31:30,157 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:31:30,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:31:30,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:31:30,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:31:38,262 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 69 for LOIs [2023-12-02 14:31:38,288 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 153 for LOIs [2023-12-02 14:31:38,441 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 69 for LOIs [2023-12-02 14:31:38,447 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 69 for LOIs [2023-12-02 14:31:38,482 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 101 for LOIs [2023-12-02 14:31:38,764 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 69 for LOIs [2023-12-02 14:31:39,720 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:54,094 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 14:31:54,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:54,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:31:54,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 18 [2023-12-02 14:31:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066487508] [2023-12-02 14:31:54,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 14:31:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 14:31:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=5489, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 14:31:54,097 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 14:31:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:59,352 INFO L93 Difference]: Finished difference Result 18105 states and 23440 transitions. [2023-12-02 14:31:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-12-02 14:31:59,352 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 14:31:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:59,369 INFO L225 Difference]: With dead ends: 18105 [2023-12-02 14:31:59,369 INFO L226 Difference]: Without dead ends: 11824 [2023-12-02 14:31:59,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 384 SyntacticMatches, 4 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21628 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=3586, Invalid=45920, Unknown=0, NotChecked=0, Total=49506 [2023-12-02 14:31:59,382 INFO L413 NwaCegarLoop]: 3559 mSDtfsCounter, 14670 mSDsluCounter, 28286 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:59,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14678 Valid, 31845 Invalid, 4904 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [315 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 14:31:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11824 states. [2023-12-02 14:31:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11824 to 7720. [2023-12-02 14:31:59,917 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 14:31:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7720 states to 7720 states and 10468 transitions. [2023-12-02 14:31:59,926 INFO L78 Accepts]: Start accepts. Automaton has 7720 states and 10468 transitions. Word has length 129 [2023-12-02 14:31:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:59,927 INFO L495 AbstractCegarLoop]: Abstraction has 7720 states and 10468 transitions. [2023-12-02 14:31:59,927 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 14:31:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7720 states and 10468 transitions. [2023-12-02 14:31:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 14:31:59,930 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:59,930 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 14:31:59,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 14:32:00,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 14:32:00,131 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:32:00,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:32:00,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1197538314, now seen corresponding path program 1 times [2023-12-02 14:32:00,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:32:00,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981627295] [2023-12-02 14:32:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:00,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:32:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:00,632 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 14:32:00,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:32:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981627295] [2023-12-02 14:32:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981627295] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:32:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503467751] [2023-12-02 14:32:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:00,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:32:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:32:00,634 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:32:00,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 14:32:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:00,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 14:32:00,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:32:01,122 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 14:32:01,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:32:01,630 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 14:32:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503467751] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:32:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547435673] [2023-12-02 14:32:01,633 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 14:32:01,633 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:32:01,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:32:01,633 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:32:01,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:32:09,409 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 70 for LOIs [2023-12-02 14:32:09,456 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 155 for LOIs [2023-12-02 14:32:09,611 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 70 for LOIs [2023-12-02 14:32:09,618 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 70 for LOIs [2023-12-02 14:32:09,654 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 103 for LOIs [2023-12-02 14:32:09,871 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 70 for LOIs [2023-12-02 14:32:10,958 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:32:27,839 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 14:32:27,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:32:27,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:32:27,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2023-12-02 14:32:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715664152] [2023-12-02 14:32:27,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:32:27,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 14:32:27,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:32:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 14:32:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=9210, Unknown=0, NotChecked=0, Total=9900 [2023-12-02 14:32:27,842 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 14:32:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:32:33,604 INFO L93 Difference]: Finished difference Result 17423 states and 22356 transitions. [2023-12-02 14:32:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 14:32:33,604 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 14:32:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:32:33,618 INFO L225 Difference]: With dead ends: 17423 [2023-12-02 14:32:33,619 INFO L226 Difference]: Without dead ends: 12362 [2023-12-02 14:32:33,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 331 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9777 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=2360, Invalid=23080, Unknown=0, NotChecked=0, Total=25440 [2023-12-02 14:32:33,624 INFO L413 NwaCegarLoop]: 3138 mSDtfsCounter, 29460 mSDsluCounter, 37660 mSDsCounter, 0 mSdLazyCounter, 4938 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:32:33,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29460 Valid, 40798 Invalid, 6143 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1205 Valid, 4938 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 14:32:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12362 states. [2023-12-02 14:32:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12362 to 7429. [2023-12-02 14:32:34,200 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 14:32:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 10068 transitions. [2023-12-02 14:32:34,210 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 10068 transitions. Word has length 131 [2023-12-02 14:32:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:32:34,210 INFO L495 AbstractCegarLoop]: Abstraction has 7429 states and 10068 transitions. [2023-12-02 14:32:34,210 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 14:32:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 10068 transitions. [2023-12-02 14:32:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 14:32:34,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:32:34,213 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 14:32:34,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 14:32:34,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 14:32:34,413 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:32:34,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:32:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1747664192, now seen corresponding path program 1 times [2023-12-02 14:32:34,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:32:34,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466824529] [2023-12-02 14:32:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:32:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:34,548 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 14:32:34,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:32:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466824529] [2023-12-02 14:32:34,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466824529] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:32:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937457991] [2023-12-02 14:32:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:34,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:32:34,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:32:34,550 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:32:34,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 14:32:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:34,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:32:34,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:32:34,763 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 14:32:34,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:32:34,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937457991] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:32:34,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:32:34,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 14:32:34,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103647820] [2023-12-02 14:32:34,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:32:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:32:34,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:32:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:32:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:32:34,765 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 14:32:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:32:35,588 INFO L93 Difference]: Finished difference Result 12819 states and 16518 transitions. [2023-12-02 14:32:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:32:35,589 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 14:32:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:32:35,598 INFO L225 Difference]: With dead ends: 12819 [2023-12-02 14:32:35,598 INFO L226 Difference]: Without dead ends: 7717 [2023-12-02 14:32:35,603 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 14:32:35,604 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3343 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:32:35,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 3205 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:32:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7717 states. [2023-12-02 14:32:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7717 to 7535. [2023-12-02 14:32:36,191 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 14:32:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7535 states to 7535 states and 10129 transitions. [2023-12-02 14:32:36,201 INFO L78 Accepts]: Start accepts. Automaton has 7535 states and 10129 transitions. Word has length 149 [2023-12-02 14:32:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:32:36,201 INFO L495 AbstractCegarLoop]: Abstraction has 7535 states and 10129 transitions. [2023-12-02 14:32:36,201 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 14:32:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 7535 states and 10129 transitions. [2023-12-02 14:32:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 14:32:36,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:32:36,204 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 14:32:36,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 14:32:36,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 14:32:36,404 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:32:36,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:32:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -223710081, now seen corresponding path program 1 times [2023-12-02 14:32:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:32:36,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580744172] [2023-12-02 14:32:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:36,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:32:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:36,446 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 14:32:36,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:32:36,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580744172] [2023-12-02 14:32:36,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580744172] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:32:36,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623647137] [2023-12-02 14:32:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:36,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:32:36,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:32:36,447 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:32:36,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 14:32:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:36,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:32:36,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:32:36,604 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 14:32:36,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:32:36,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623647137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:32:36,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:32:36,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 14:32:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855305783] [2023-12-02 14:32:36,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:32:36,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:32:36,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:32:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:32:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:32:36,606 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 14:32:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:32:37,546 INFO L93 Difference]: Finished difference Result 12385 states and 15977 transitions. [2023-12-02 14:32:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:32:37,546 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 14:32:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:32:37,555 INFO L225 Difference]: With dead ends: 12385 [2023-12-02 14:32:37,555 INFO L226 Difference]: Without dead ends: 7174 [2023-12-02 14:32:37,560 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 14:32:37,561 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:32:37,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6355 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:32:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7174 states. [2023-12-02 14:32:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7174 to 7074. [2023-12-02 14:32:38,106 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 14:32:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 9403 transitions. [2023-12-02 14:32:38,115 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 9403 transitions. Word has length 149 [2023-12-02 14:32:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:32:38,115 INFO L495 AbstractCegarLoop]: Abstraction has 7074 states and 9403 transitions. [2023-12-02 14:32:38,116 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 14:32:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 9403 transitions. [2023-12-02 14:32:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 14:32:38,118 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:32:38,118 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 14:32:38,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 14:32:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 14:32:38,319 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:32:38,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:32:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash 678242778, now seen corresponding path program 1 times [2023-12-02 14:32:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:32:38,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512888471] [2023-12-02 14:32:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:32:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:38,499 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 14:32:38,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:32:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512888471] [2023-12-02 14:32:38,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512888471] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:32:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624916044] [2023-12-02 14:32:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:38,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:32:38,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:32:38,501 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:32:38,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 14:32:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:38,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 14:32:38,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:32:38,714 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 14:32:38,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:32:38,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624916044] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:32:38,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:32:38,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 14:32:38,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348613836] [2023-12-02 14:32:38,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:32:38,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:32:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:32:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:32:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:32:38,716 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 14:32:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:32:40,096 INFO L93 Difference]: Finished difference Result 12756 states and 15904 transitions. [2023-12-02 14:32:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:32:40,096 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 14:32:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:32:40,107 INFO L225 Difference]: With dead ends: 12756 [2023-12-02 14:32:40,107 INFO L226 Difference]: Without dead ends: 8096 [2023-12-02 14:32:40,112 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 14:32:40,113 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 207 mSDsluCounter, 12496 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:32:40,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 15707 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:32:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2023-12-02 14:32:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 7561. [2023-12-02 14:32:40,734 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 14:32:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7561 states to 7561 states and 9941 transitions. [2023-12-02 14:32:40,743 INFO L78 Accepts]: Start accepts. Automaton has 7561 states and 9941 transitions. Word has length 152 [2023-12-02 14:32:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:32:40,743 INFO L495 AbstractCegarLoop]: Abstraction has 7561 states and 9941 transitions. [2023-12-02 14:32:40,744 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 14:32:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7561 states and 9941 transitions. [2023-12-02 14:32:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-02 14:32:40,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:32:40,748 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 14:32:40,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 14:32:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 14:32:40,948 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:32:40,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:32:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1796835936, now seen corresponding path program 1 times [2023-12-02 14:32:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:32:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666665350] [2023-12-02 14:32:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:32:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:41,128 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 14:32:41,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:32:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666665350] [2023-12-02 14:32:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666665350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:32:41,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:32:41,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:32:41,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783712134] [2023-12-02 14:32:41,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:32:41,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:32:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:32:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:32:41,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:32:41,131 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 14:32:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:32:43,748 INFO L93 Difference]: Finished difference Result 21542 states and 25877 transitions. [2023-12-02 14:32:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:32:43,749 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 14:32:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:32:43,770 INFO L225 Difference]: With dead ends: 21542 [2023-12-02 14:32:43,770 INFO L226 Difference]: Without dead ends: 18621 [2023-12-02 14:32:43,776 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 14:32:43,776 INFO L413 NwaCegarLoop]: 3403 mSDtfsCounter, 3641 mSDsluCounter, 9917 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:32:43,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3641 Valid, 13320 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:32:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18621 states. [2023-12-02 14:32:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18621 to 11821. [2023-12-02 14:32:44,965 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 14:32:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11821 states to 11821 states and 14771 transitions. [2023-12-02 14:32:44,979 INFO L78 Accepts]: Start accepts. Automaton has 11821 states and 14771 transitions. Word has length 181 [2023-12-02 14:32:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:32:44,980 INFO L495 AbstractCegarLoop]: Abstraction has 11821 states and 14771 transitions. [2023-12-02 14:32:44,980 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 14:32:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 11821 states and 14771 transitions. [2023-12-02 14:32:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 14:32:44,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:32:44,985 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 14:32:44,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 14:32:44,985 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:32:44,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:32:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1250314985, now seen corresponding path program 1 times [2023-12-02 14:32:44,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:32:44,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57984127] [2023-12-02 14:32:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:32:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:45,507 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 14:32:45,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:32:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57984127] [2023-12-02 14:32:45,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57984127] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:32:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842992970] [2023-12-02 14:32:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:32:45,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:32:45,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:32:45,509 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:32:45,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 14:32:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:32:45,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 14:32:45,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:32:45,808 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 14:32:45,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:32:46,171 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 14:32:46,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842992970] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:32:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [399698185] [2023-12-02 14:32:46,173 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-12-02 14:32:46,174 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:32:46,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:32:46,174 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:32:46,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:32:53,568 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 6 for LOIs [2023-12-02 14:32:53,573 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 141 for LOIs [2023-12-02 14:32:53,688 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 6 for LOIs [2023-12-02 14:32:53,689 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 6 for LOIs [2023-12-02 14:32:53,698 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 1 for LOIs [2023-12-02 14:32:53,725 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 14:32:53,794 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:32:58,926 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 14:32:58,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:32:58,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:32:58,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 12] total 31 [2023-12-02 14:32:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028596420] [2023-12-02 14:32:58,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:32:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 14:32:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:32:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 14:32:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=9172, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 14:32:58,930 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 14:33:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:05,934 INFO L93 Difference]: Finished difference Result 22488 states and 27100 transitions. [2023-12-02 14:33:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-12-02 14:33:05,935 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 14:33:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:05,951 INFO L225 Difference]: With dead ends: 22488 [2023-12-02 14:33:05,951 INFO L226 Difference]: Without dead ends: 13489 [2023-12-02 14:33:05,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 529 SyntacticMatches, 7 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13642 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2998, Invalid=32534, Unknown=0, NotChecked=0, Total=35532 [2023-12-02 14:33:05,962 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 38758 mSDsluCounter, 25850 mSDsCounter, 0 mSdLazyCounter, 5626 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:05,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38759 Valid, 29019 Invalid, 6601 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [975 Valid, 5626 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 14:33:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13489 states. [2023-12-02 14:33:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13489 to 10202. [2023-12-02 14:33:07,057 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 14:33:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 12868 transitions. [2023-12-02 14:33:07,070 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 12868 transitions. Word has length 197 [2023-12-02 14:33:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:07,070 INFO L495 AbstractCegarLoop]: Abstraction has 10202 states and 12868 transitions. [2023-12-02 14:33:07,070 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 14:33:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 12868 transitions. [2023-12-02 14:33:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-12-02 14:33:07,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:07,074 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 14:33:07,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 14:33:07,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:07,275 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:07,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash -510481508, now seen corresponding path program 1 times [2023-12-02 14:33:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581661106] [2023-12-02 14:33:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:07,410 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 14:33:07,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581661106] [2023-12-02 14:33:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581661106] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:33:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742739525] [2023-12-02 14:33:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:07,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:07,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:33:07,412 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:33:07,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 14:33:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:07,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:33:07,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:33:07,603 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 14:33:07,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:33:07,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742739525] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:07,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:33:07,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 14:33:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775106818] [2023-12-02 14:33:07,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:07,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:33:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:33:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:33:07,605 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 14:33:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:08,863 INFO L93 Difference]: Finished difference Result 14714 states and 17848 transitions. [2023-12-02 14:33:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:33:08,863 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 14:33:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:08,870 INFO L225 Difference]: With dead ends: 14714 [2023-12-02 14:33:08,871 INFO L226 Difference]: Without dead ends: 7353 [2023-12-02 14:33:08,876 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 14:33:08,876 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3340 mSDsluCounter, 3301 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 14:33:08,876 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 14:33:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7353 states. [2023-12-02 14:33:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7353 to 7056. [2023-12-02 14:33:09,563 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 14:33:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7056 states to 7056 states and 9241 transitions. [2023-12-02 14:33:09,573 INFO L78 Accepts]: Start accepts. Automaton has 7056 states and 9241 transitions. Word has length 218 [2023-12-02 14:33:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:09,573 INFO L495 AbstractCegarLoop]: Abstraction has 7056 states and 9241 transitions. [2023-12-02 14:33:09,573 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 14:33:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7056 states and 9241 transitions. [2023-12-02 14:33:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-12-02 14:33:09,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:09,578 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 14:33:09,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-02 14:33:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:09,779 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:09,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1208661980, now seen corresponding path program 2 times [2023-12-02 14:33:09,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:09,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575533187] [2023-12-02 14:33:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:09,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:09,928 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 14:33:09,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:09,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575533187] [2023-12-02 14:33:09,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575533187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:33:09,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909419019] [2023-12-02 14:33:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:33:09,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:09,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:33:09,929 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:33:09,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 14:33:10,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 14:33:10,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:33:10,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:33:10,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:33:10,039 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 14:33:10,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:33:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909419019] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:10,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:33:10,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 14:33:10,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444915215] [2023-12-02 14:33:10,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:10,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:33:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:33:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:33:10,041 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 14:33:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:11,029 INFO L93 Difference]: Finished difference Result 10158 states and 12621 transitions. [2023-12-02 14:33:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:33:11,029 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 14:33:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:11,035 INFO L225 Difference]: With dead ends: 10158 [2023-12-02 14:33:11,035 INFO L226 Difference]: Without dead ends: 5730 [2023-12-02 14:33:11,037 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 14:33:11,038 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3335 mSDsluCounter, 3298 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 14:33:11,038 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 14:33:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2023-12-02 14:33:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5509. [2023-12-02 14:33:11,511 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 14:33:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5509 states to 5509 states and 7498 transitions. [2023-12-02 14:33:11,518 INFO L78 Accepts]: Start accepts. Automaton has 5509 states and 7498 transitions. Word has length 218 [2023-12-02 14:33:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:11,518 INFO L495 AbstractCegarLoop]: Abstraction has 5509 states and 7498 transitions. [2023-12-02 14:33:11,518 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 14:33:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5509 states and 7498 transitions. [2023-12-02 14:33:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-12-02 14:33:11,522 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:11,522 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 14:33:11,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 14:33:11,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:11,723 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:11,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1277123583, now seen corresponding path program 1 times [2023-12-02 14:33:11,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:11,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194203787] [2023-12-02 14:33:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:11,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:11,852 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 14:33:11,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194203787] [2023-12-02 14:33:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194203787] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:33:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18990935] [2023-12-02 14:33:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:11,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:11,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:33:11,854 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:33:11,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 14:33:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:11,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:33:11,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:33:12,022 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 14:33:12,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:33:12,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18990935] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:12,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:33:12,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 14:33:12,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966862315] [2023-12-02 14:33:12,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:12,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:33:12,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:12,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:33:12,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:33:12,024 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 14:33:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:12,938 INFO L93 Difference]: Finished difference Result 8305 states and 10534 transitions. [2023-12-02 14:33:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:33:12,938 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 14:33:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:12,944 INFO L225 Difference]: With dead ends: 8305 [2023-12-02 14:33:12,944 INFO L226 Difference]: Without dead ends: 5501 [2023-12-02 14:33:12,947 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 14:33:12,948 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3342 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:12,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3342 Valid, 6566 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:33:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2023-12-02 14:33:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 5261. [2023-12-02 14:33:13,423 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 14:33:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7161 transitions. [2023-12-02 14:33:13,429 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7161 transitions. Word has length 220 [2023-12-02 14:33:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:13,429 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 7161 transitions. [2023-12-02 14:33:13,430 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 14:33:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7161 transitions. [2023-12-02 14:33:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-12-02 14:33:13,432 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:13,432 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 14:33:13,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 14:33:13,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 14:33:13,633 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:13,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2126466098, now seen corresponding path program 1 times [2023-12-02 14:33:13,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:13,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464422910] [2023-12-02 14:33:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:13,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:13,904 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 14:33:13,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:13,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464422910] [2023-12-02 14:33:13,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464422910] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:33:13,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415110005] [2023-12-02 14:33:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:13,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:13,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:33:13,906 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:33:13,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 14:33:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:14,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 14:33:14,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:33:14,147 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 14:33:14,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:33:14,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415110005] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:14,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:33:14,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2023-12-02 14:33:14,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287942118] [2023-12-02 14:33:14,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:14,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:33:14,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:14,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:33:14,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:33:14,149 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 14:33:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:14,815 INFO L93 Difference]: Finished difference Result 5729 states and 7661 transitions. [2023-12-02 14:33:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:33:14,815 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 14:33:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:14,817 INFO L225 Difference]: With dead ends: 5729 [2023-12-02 14:33:14,817 INFO L226 Difference]: Without dead ends: 1642 [2023-12-02 14:33:14,821 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 14:33:14,821 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 71 mSDsluCounter, 6293 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:14,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 9486 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:33:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2023-12-02 14:33:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2023-12-02 14:33:14,835 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 14:33:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2023-12-02 14:33:14,837 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 222 [2023-12-02 14:33:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:14,838 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2023-12-02 14:33:14,838 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 14:33:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2023-12-02 14:33:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2023-12-02 14:33:14,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:14,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:33:14,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 14:33:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 14:33:15,058 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:15,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:15,058 INFO L85 PathProgramCache]: Analyzing trace with hash -841773000, now seen corresponding path program 1 times [2023-12-02 14:33:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380818157] [2023-12-02 14:33:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:18,074 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 14:33:18,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:18,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380818157] [2023-12-02 14:33:18,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380818157] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:18,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:33:18,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:33:18,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749030320] [2023-12-02 14:33:18,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:18,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:33:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:33:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:33:18,080 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 14:33:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:31,208 INFO L93 Difference]: Finished difference Result 8193 states and 16325 transitions. [2023-12-02 14:33:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:33:31,208 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 14:33:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:31,217 INFO L225 Difference]: With dead ends: 8193 [2023-12-02 14:33:31,217 INFO L226 Difference]: Without dead ends: 6553 [2023-12-02 14:33:31,219 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 14:33:31,219 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 3699 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9654 mSolverCounterSat, 5550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s 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, 12.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:31,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3699 Valid, 481 Invalid, 15204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5550 Valid, 9654 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2023-12-02 14:33:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2023-12-02 14:33:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 4918. [2023-12-02 14:33:31,259 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 14:33:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 7672 transitions. [2023-12-02 14:33:31,265 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 7672 transitions. Word has length 1632 [2023-12-02 14:33:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:31,267 INFO L495 AbstractCegarLoop]: Abstraction has 4918 states and 7672 transitions. [2023-12-02 14:33:31,268 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 14:33:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 7672 transitions. [2023-12-02 14:33:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1753 [2023-12-02 14:33:31,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:31,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:33:31,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 14:33:31,299 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:31,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash 83268236, now seen corresponding path program 1 times [2023-12-02 14:33:31,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:31,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183986673] [2023-12-02 14:33:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:31,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:32,545 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 14:33:32,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:32,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183986673] [2023-12-02 14:33:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183986673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:32,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:33:32,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:33:32,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213169026] [2023-12-02 14:33:32,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:32,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:33:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:33:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:33:32,551 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 14:33:38,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:38,425 INFO L93 Difference]: Finished difference Result 13110 states and 21367 transitions. [2023-12-02 14:33:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:33:38,426 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 14:33:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:38,434 INFO L225 Difference]: With dead ends: 13110 [2023-12-02 14:33:38,434 INFO L226 Difference]: Without dead ends: 8194 [2023-12-02 14:33:38,438 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 14:33:38,438 INFO L413 NwaCegarLoop]: 2814 mSDtfsCounter, 1643 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s 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, 5.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:38,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1643 Valid, 2826 Invalid, 6788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-12-02 14:33:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2023-12-02 14:33:38,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 8194. [2023-12-02 14:33:38,496 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 14:33:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8194 states to 8194 states and 11608 transitions. [2023-12-02 14:33:38,505 INFO L78 Accepts]: Start accepts. Automaton has 8194 states and 11608 transitions. Word has length 1752 [2023-12-02 14:33:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:38,505 INFO L495 AbstractCegarLoop]: Abstraction has 8194 states and 11608 transitions. [2023-12-02 14:33:38,505 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 14:33:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8194 states and 11608 transitions. [2023-12-02 14:33:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1760 [2023-12-02 14:33:38,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:38,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:33:38,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 14:33:38,534 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:38,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash -148364694, now seen corresponding path program 1 times [2023-12-02 14:33:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:38,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98211530] [2023-12-02 14:33:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:38,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:40,736 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 14:33:40,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:40,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98211530] [2023-12-02 14:33:40,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98211530] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:40,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:33:40,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:33:40,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603693523] [2023-12-02 14:33:40,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:40,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:33:40,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:40,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:33:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:33:40,741 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 14:33:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:45,730 INFO L93 Difference]: Finished difference Result 19662 states and 27150 transitions. [2023-12-02 14:33:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:33:45,731 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 14:33:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:45,738 INFO L225 Difference]: With dead ends: 19662 [2023-12-02 14:33:45,738 INFO L226 Difference]: Without dead ends: 11470 [2023-12-02 14:33:45,741 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 14:33:45,742 INFO L413 NwaCegarLoop]: 2897 mSDtfsCounter, 1632 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5341 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:45,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 2909 Invalid, 5539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 5341 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-02 14:33:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11470 states. [2023-12-02 14:33:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 11470. [2023-12-02 14:33:45,817 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 14:33:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11470 states to 11470 states and 15340 transitions. [2023-12-02 14:33:45,828 INFO L78 Accepts]: Start accepts. Automaton has 11470 states and 15340 transitions. Word has length 1759 [2023-12-02 14:33:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:45,829 INFO L495 AbstractCegarLoop]: Abstraction has 11470 states and 15340 transitions. [2023-12-02 14:33:45,829 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 14:33:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 11470 states and 15340 transitions. [2023-12-02 14:33:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1766 [2023-12-02 14:33:45,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:45,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:33:45,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 14:33:45,858 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:45,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1060154400, now seen corresponding path program 1 times [2023-12-02 14:33:45,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:45,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116213020] [2023-12-02 14:33:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:45,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:46,870 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 14:33:46,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116213020] [2023-12-02 14:33:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116213020] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:46,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:33:46,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:33:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949317930] [2023-12-02 14:33:46,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:46,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:33:46,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:33:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:33:46,876 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 14:33:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:52,984 INFO L93 Difference]: Finished difference Result 32766 states and 44371 transitions. [2023-12-02 14:33:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:33:52,985 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 14:33:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:53,000 INFO L225 Difference]: With dead ends: 32766 [2023-12-02 14:33:53,000 INFO L226 Difference]: Without dead ends: 21298 [2023-12-02 14:33:53,003 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 14:33:53,004 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 1600 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4554 mSolverCounterSat, 2253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s 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, 5.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:53,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 1372 Invalid, 6807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2253 Valid, 4554 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-02 14:33:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21298 states. [2023-12-02 14:33:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21298 to 21298. [2023-12-02 14:33:53,150 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 14:33:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21298 states to 21298 states and 26933 transitions. [2023-12-02 14:33:53,172 INFO L78 Accepts]: Start accepts. Automaton has 21298 states and 26933 transitions. Word has length 1765 [2023-12-02 14:33:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:53,172 INFO L495 AbstractCegarLoop]: Abstraction has 21298 states and 26933 transitions. [2023-12-02 14:33:53,173 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 14:33:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 21298 states and 26933 transitions. [2023-12-02 14:33:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1778 [2023-12-02 14:33:53,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:53,204 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 14:33:53,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-12-02 14:33:53,204 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:53,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1886263822, now seen corresponding path program 1 times [2023-12-02 14:33:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866463009] [2023-12-02 14:33:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:53,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:56,296 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 14:33:56,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866463009] [2023-12-02 14:33:56,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866463009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:33:56,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:33:56,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:33:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477344571] [2023-12-02 14:33:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:33:56,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:33:56,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:33:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:33:56,301 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 14:34:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:14,002 INFO L93 Difference]: Finished difference Result 70437 states and 93695 transitions. [2023-12-02 14:34:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:34:14,003 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 14:34:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:14,039 INFO L225 Difference]: With dead ends: 70437 [2023-12-02 14:34:14,039 INFO L226 Difference]: Without dead ends: 45868 [2023-12-02 14:34:14,047 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 14:34:14,047 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 6749 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 17315 mSolverCounterSat, 6236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s 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, 17.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:14,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6749 Valid, 696 Invalid, 23551 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6236 Valid, 17315 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2023-12-02 14:34:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45868 states. [2023-12-02 14:34:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45868 to 42592. [2023-12-02 14:34:14,375 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 14:34:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42592 states to 42592 states and 49041 transitions. [2023-12-02 14:34:14,419 INFO L78 Accepts]: Start accepts. Automaton has 42592 states and 49041 transitions. Word has length 1777 [2023-12-02 14:34:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:14,420 INFO L495 AbstractCegarLoop]: Abstraction has 42592 states and 49041 transitions. [2023-12-02 14:34:14,420 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 14:34:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 42592 states and 49041 transitions. [2023-12-02 14:34:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2023 [2023-12-02 14:34:14,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:14,469 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 14:34:14,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-12-02 14:34:14,469 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:14,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1841708066, now seen corresponding path program 1 times [2023-12-02 14:34:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:14,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145446530] [2023-12-02 14:34:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:15,926 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 14:34:15,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145446530] [2023-12-02 14:34:15,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145446530] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:34:15,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:34:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:34:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537502682] [2023-12-02 14:34:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:34:15,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:34:15,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:34:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:34:15,932 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 14:34:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:22,082 INFO L93 Difference]: Finished difference Result 99924 states and 116180 transitions. [2023-12-02 14:34:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:34:22,083 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 14:34:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:22,139 INFO L225 Difference]: With dead ends: 99924 [2023-12-02 14:34:22,139 INFO L226 Difference]: Without dead ends: 57334 [2023-12-02 14:34:22,164 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 14:34:22,165 INFO L413 NwaCegarLoop]: 2840 mSDtfsCounter, 1650 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5778 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s 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, 5.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:22,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 2851 Invalid, 7081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 5778 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-12-02 14:34:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57334 states. [2023-12-02 14:34:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57334 to 55696. [2023-12-02 14:34:22,636 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 14:34:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55696 states to 55696 states and 63660 transitions. [2023-12-02 14:34:22,695 INFO L78 Accepts]: Start accepts. Automaton has 55696 states and 63660 transitions. Word has length 2022 [2023-12-02 14:34:22,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:22,696 INFO L495 AbstractCegarLoop]: Abstraction has 55696 states and 63660 transitions. [2023-12-02 14:34:22,696 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 14:34:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 55696 states and 63660 transitions. [2023-12-02 14:34:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2046 [2023-12-02 14:34:22,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:22,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:34:22,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-12-02 14:34:22,762 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:22,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:22,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1837213913, now seen corresponding path program 1 times [2023-12-02 14:34:22,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:22,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846346977] [2023-12-02 14:34:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:24,525 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 14:34:24,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846346977] [2023-12-02 14:34:24,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846346977] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:34:24,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:34:24,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:34:24,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951963] [2023-12-02 14:34:24,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:34:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:34:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:34:24,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:34:24,530 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 14:34:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:30,813 INFO L93 Difference]: Finished difference Result 134322 states and 156598 transitions. [2023-12-02 14:34:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:34:30,814 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 14:34:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:30,885 INFO L225 Difference]: With dead ends: 134322 [2023-12-02 14:34:30,885 INFO L226 Difference]: Without dead ends: 78628 [2023-12-02 14:34:30,908 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 14:34:30,908 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 1840 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4817 mSolverCounterSat, 2019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s 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, 5.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:30,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 1138 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2019 Valid, 4817 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-02 14:34:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78628 states. [2023-12-02 14:34:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78628 to 78628. [2023-12-02 14:34:31,673 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 14:34:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78628 states to 78628 states and 91043 transitions. [2023-12-02 14:34:31,755 INFO L78 Accepts]: Start accepts. Automaton has 78628 states and 91043 transitions. Word has length 2045 [2023-12-02 14:34:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:31,756 INFO L495 AbstractCegarLoop]: Abstraction has 78628 states and 91043 transitions. [2023-12-02 14:34:31,756 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 14:34:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 78628 states and 91043 transitions. [2023-12-02 14:34:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2060 [2023-12-02 14:34:31,826 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:31,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:34:31,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-12-02 14:34:31,828 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:31,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash 782761250, now seen corresponding path program 1 times [2023-12-02 14:34:31,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:31,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655959391] [2023-12-02 14:34:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:31,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:33,451 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 14:34:33,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:33,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655959391] [2023-12-02 14:34:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655959391] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:34:33,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:34:33,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:34:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656622221] [2023-12-02 14:34:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:34:33,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:34:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:33,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:34:33,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:34:33,456 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 14:34:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:40,285 INFO L93 Difference]: Finished difference Result 208032 states and 240903 transitions. [2023-12-02 14:34:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:34:40,286 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 14:34:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:40,507 INFO L225 Difference]: With dead ends: 208032 [2023-12-02 14:34:40,508 INFO L226 Difference]: Without dead ends: 129406 [2023-12-02 14:34:40,526 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 14:34:40,527 INFO L413 NwaCegarLoop]: 2830 mSDtfsCounter, 1612 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5063 mSolverCounterSat, 1923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s 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, 6.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:40,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 2842 Invalid, 6986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1923 Valid, 5063 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-12-02 14:34:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129406 states. [2023-12-02 14:34:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129406 to 124492. [2023-12-02 14:34:41,631 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 14:34:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124492 states to 124492 states and 140345 transitions. [2023-12-02 14:34:41,760 INFO L78 Accepts]: Start accepts. Automaton has 124492 states and 140345 transitions. Word has length 2059 [2023-12-02 14:34:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:41,760 INFO L495 AbstractCegarLoop]: Abstraction has 124492 states and 140345 transitions. [2023-12-02 14:34:41,761 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 14:34:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 124492 states and 140345 transitions. [2023-12-02 14:34:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2077 [2023-12-02 14:34:42,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:42,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:34:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 14:34:42,077 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:42,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1821936612, now seen corresponding path program 1 times [2023-12-02 14:34:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:42,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348687595] [2023-12-02 14:34:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:45,342 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 14:34:45,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348687595] [2023-12-02 14:34:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348687595] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:34:45,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:34:45,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:34:45,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076986079] [2023-12-02 14:34:45,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:34:45,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:34:45,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:34:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:34:45,348 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 14:34:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:34:51,140 INFO L93 Difference]: Finished difference Result 252258 states and 284078 transitions. [2023-12-02 14:34:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:34:51,140 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 14:34:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:34:51,270 INFO L225 Difference]: With dead ends: 252258 [2023-12-02 14:34:51,271 INFO L226 Difference]: Without dead ends: 127768 [2023-12-02 14:34:51,329 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 14:34:51,330 INFO L413 NwaCegarLoop]: 3019 mSDtfsCounter, 1610 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5452 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s 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, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:51,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 3031 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 5452 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 14:34:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127768 states. [2023-12-02 14:34:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127768 to 126130. [2023-12-02 14:34:52,682 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 14:34:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126130 states to 126130 states and 141761 transitions. [2023-12-02 14:34:52,976 INFO L78 Accepts]: Start accepts. Automaton has 126130 states and 141761 transitions. Word has length 2076 [2023-12-02 14:34:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:34:52,976 INFO L495 AbstractCegarLoop]: Abstraction has 126130 states and 141761 transitions. [2023-12-02 14:34:52,977 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 14:34:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 126130 states and 141761 transitions. [2023-12-02 14:34:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2140 [2023-12-02 14:34:53,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:34:53,088 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 14:34:53,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-12-02 14:34:53,088 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:34:53,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:34:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1058126031, now seen corresponding path program 1 times [2023-12-02 14:34:53,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:34:53,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941179166] [2023-12-02 14:34:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:34:53,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:34:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:34:55,001 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 14:34:55,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:34:55,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941179166] [2023-12-02 14:34:55,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941179166] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:34:55,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:34:55,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:34:55,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858156397] [2023-12-02 14:34:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:34:55,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:34:55,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:34:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:34:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:34:55,006 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 14:35:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:01,522 INFO L93 Difference]: Finished difference Result 291570 states and 329221 transitions. [2023-12-02 14:35:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:35:01,523 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 14:35:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:01,681 INFO L225 Difference]: With dead ends: 291570 [2023-12-02 14:35:01,681 INFO L226 Difference]: Without dead ends: 165442 [2023-12-02 14:35:01,729 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 14:35:01,729 INFO L413 NwaCegarLoop]: 2202 mSDtfsCounter, 1774 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5393 mSolverCounterSat, 1417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s 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, 5.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:01,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1774 Valid, 2214 Invalid, 6810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1417 Valid, 5393 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-12-02 14:35:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165442 states. [2023-12-02 14:35:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165442 to 165442. [2023-12-02 14:35:03,246 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 14:35:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165442 states to 165442 states and 181028 transitions. [2023-12-02 14:35:03,651 INFO L78 Accepts]: Start accepts. Automaton has 165442 states and 181028 transitions. Word has length 2139 [2023-12-02 14:35:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:03,652 INFO L495 AbstractCegarLoop]: Abstraction has 165442 states and 181028 transitions. [2023-12-02 14:35:03,653 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 14:35:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 165442 states and 181028 transitions. [2023-12-02 14:35:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2307 [2023-12-02 14:35:03,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:35:03,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:35:03,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-12-02 14:35:03,799 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:35:03,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:35:03,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1251461627, now seen corresponding path program 1 times [2023-12-02 14:35:03,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:35:03,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16010516] [2023-12-02 14:35:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:35:03,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:35:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:35:06,050 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 14:35:06,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:35:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16010516] [2023-12-02 14:35:06,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16010516] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:35:06,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:35:06,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:35:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053302783] [2023-12-02 14:35:06,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:35:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:35:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:35:06,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:35:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:35:06,056 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 14:35:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:12,446 INFO L93 Difference]: Finished difference Result 393126 states and 428301 transitions. [2023-12-02 14:35:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:35:12,447 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 14:35:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:12,854 INFO L225 Difference]: With dead ends: 393126 [2023-12-02 14:35:12,854 INFO L226 Difference]: Without dead ends: 216220 [2023-12-02 14:35:12,905 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 14:35:12,905 INFO L413 NwaCegarLoop]: 2908 mSDtfsCounter, 1702 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4664 mSolverCounterSat, 1622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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, 5.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:12,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1702 Valid, 2920 Invalid, 6286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1622 Valid, 4664 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-12-02 14:35:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216220 states. [2023-12-02 14:35:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216220 to 214582. [2023-12-02 14:35:14,817 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 14:35:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214582 states to 214582 states and 223473 transitions. [2023-12-02 14:35:15,094 INFO L78 Accepts]: Start accepts. Automaton has 214582 states and 223473 transitions. Word has length 2306 [2023-12-02 14:35:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:15,094 INFO L495 AbstractCegarLoop]: Abstraction has 214582 states and 223473 transitions. [2023-12-02 14:35:15,095 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 14:35:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 214582 states and 223473 transitions. [2023-12-02 14:35:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2320 [2023-12-02 14:35:15,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:35:15,553 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:35:15,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-12-02 14:35:15,553 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:35:15,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:35:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1717540726, now seen corresponding path program 1 times [2023-12-02 14:35:15,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:35:15,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952370070] [2023-12-02 14:35:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:35:15,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:35:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:35:17,618 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 14:35:17,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:35:17,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952370070] [2023-12-02 14:35:17,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952370070] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:35:17,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:35:17,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:35:17,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649938571] [2023-12-02 14:35:17,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:35:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:35:17,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:35:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:35:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:35:17,623 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 14:35:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:23,162 INFO L93 Difference]: Finished difference Result 438990 states and 456977 transitions. [2023-12-02 14:35:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:35:23,163 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 14:35:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:23,418 INFO L225 Difference]: With dead ends: 438990 [2023-12-02 14:35:23,419 INFO L226 Difference]: Without dead ends: 224410 [2023-12-02 14:35:23,683 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 14:35:23,683 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1496 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s 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, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:23,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1496 Valid, 561 Invalid, 4942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 4392 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 14:35:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224410 states. [2023-12-02 14:35:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224410 to 216220. [2023-12-02 14:35:25,704 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 14:35:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216220 states to 216220 states and 224334 transitions. [2023-12-02 14:35:26,226 INFO L78 Accepts]: Start accepts. Automaton has 216220 states and 224334 transitions. Word has length 2319 [2023-12-02 14:35:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:26,227 INFO L495 AbstractCegarLoop]: Abstraction has 216220 states and 224334 transitions. [2023-12-02 14:35:26,227 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 14:35:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 216220 states and 224334 transitions. [2023-12-02 14:35:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2646 [2023-12-02 14:35:26,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:35:26,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:35:26,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-12-02 14:35:26,382 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:35:26,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:35:26,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1884080562, now seen corresponding path program 1 times [2023-12-02 14:35:26,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:35:26,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900456255] [2023-12-02 14:35:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:35:26,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:35:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:35:29,028 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 14:35:29,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:35:29,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900456255] [2023-12-02 14:35:29,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900456255] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:35:29,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:35:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:35:29,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118910465] [2023-12-02 14:35:29,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:35:29,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:35:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:35:29,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:35:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:35:29,034 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 14:35:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:35,158 INFO L93 Difference]: Finished difference Result 443904 states and 462029 transitions. [2023-12-02 14:35:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:35:35,159 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 14:35:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:35,427 INFO L225 Difference]: With dead ends: 443904 [2023-12-02 14:35:35,427 INFO L226 Difference]: Without dead ends: 227686 [2023-12-02 14:35:35,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:35:35,502 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1462 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4340 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s 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, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:35,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 442 Invalid, 5337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 4340 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 14:35:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227686 states. [2023-12-02 14:35:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227686 to 226048. [2023-12-02 14:35:37,758 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 14:35:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226048 states to 226048 states and 234280 transitions. [2023-12-02 14:35:37,976 INFO L78 Accepts]: Start accepts. Automaton has 226048 states and 234280 transitions. Word has length 2645 [2023-12-02 14:35:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:37,976 INFO L495 AbstractCegarLoop]: Abstraction has 226048 states and 234280 transitions. [2023-12-02 14:35:37,977 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 14:35:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 226048 states and 234280 transitions. [2023-12-02 14:35:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2774 [2023-12-02 14:35:38,124 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:35:38,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:35:38,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-12-02 14:35:38,126 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:35:38,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:35:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1753983499, now seen corresponding path program 1 times [2023-12-02 14:35:38,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:35:38,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999752971] [2023-12-02 14:35:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:35:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:35:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:35:43,037 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 14:35:43,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:35:43,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999752971] [2023-12-02 14:35:43,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999752971] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:35:43,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:35:43,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:35:43,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285796738] [2023-12-02 14:35:43,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:35:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:35:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:35:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:35:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:35:43,042 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 14:35:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:48,834 INFO L93 Difference]: Finished difference Result 509424 states and 527283 transitions. [2023-12-02 14:35:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:35:48,835 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 14:35:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:49,149 INFO L225 Difference]: With dead ends: 509424 [2023-12-02 14:35:49,150 INFO L226 Difference]: Without dead ends: 283378 [2023-12-02 14:35:49,255 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 14:35:49,255 INFO L413 NwaCegarLoop]: 2285 mSDtfsCounter, 740 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4506 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:49,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 2297 Invalid, 5020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 4506 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 14:35:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283378 states. [2023-12-02 14:35:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283378 to 276826. [2023-12-02 14:35:51,871 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 14:35:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276826 states to 276826 states and 285409 transitions. [2023-12-02 14:35:52,462 INFO L78 Accepts]: Start accepts. Automaton has 276826 states and 285409 transitions. Word has length 2773 [2023-12-02 14:35:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:52,463 INFO L495 AbstractCegarLoop]: Abstraction has 276826 states and 285409 transitions. [2023-12-02 14:35:52,463 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 14:35:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 276826 states and 285409 transitions. [2023-12-02 14:35:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2954 [2023-12-02 14:35:52,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:35:52,704 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 14:35:52,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-12-02 14:35:52,705 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:35:52,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:35:52,706 INFO L85 PathProgramCache]: Analyzing trace with hash 692880622, now seen corresponding path program 1 times [2023-12-02 14:35:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:35:52,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173455873] [2023-12-02 14:35:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:35:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:35:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:35:56,156 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 14:35:56,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:35:56,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173455873] [2023-12-02 14:35:56,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173455873] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:35:56,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:35:56,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:35:56,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583068038] [2023-12-02 14:35:56,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:35:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:35:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:35:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:35:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:35:56,162 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 14:36:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:36:02,154 INFO L93 Difference]: Finished difference Result 566754 states and 583977 transitions. [2023-12-02 14:36:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:36:02,155 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 14:36:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:36:02,504 INFO L225 Difference]: With dead ends: 566754 [2023-12-02 14:36:02,504 INFO L226 Difference]: Without dead ends: 276826 [2023-12-02 14:36:02,633 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 14:36:02,633 INFO L413 NwaCegarLoop]: 1891 mSDtfsCounter, 1634 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:36:02,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 1902 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 14:36:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276826 states. [2023-12-02 14:36:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276826 to 276826. [2023-12-02 14:36:05,596 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 14:36:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276826 states to 276826 states and 283415 transitions. [2023-12-02 14:36:06,282 INFO L78 Accepts]: Start accepts. Automaton has 276826 states and 283415 transitions. Word has length 2953 [2023-12-02 14:36:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:36:06,283 INFO L495 AbstractCegarLoop]: Abstraction has 276826 states and 283415 transitions. [2023-12-02 14:36:06,284 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 14:36:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 276826 states and 283415 transitions. [2023-12-02 14:36:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3033 [2023-12-02 14:36:06,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:36:06,527 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 14:36:06,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-12-02 14:36:06,527 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:36:06,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:36:06,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1584022126, now seen corresponding path program 1 times [2023-12-02 14:36:06,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:36:06,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36296810] [2023-12-02 14:36:06,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:36:06,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:36:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:36:11,862 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 14:36:11,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:36:11,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36296810] [2023-12-02 14:36:11,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36296810] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:36:11,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:36:11,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:36:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883587441] [2023-12-02 14:36:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:36:11,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:36:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:36:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:36:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:36:11,867 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 14:36:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:36:17,359 INFO L93 Difference]: Finished difference Result 553650 states and 566828 transitions. [2023-12-02 14:36:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:36:17,359 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 14:36:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:36:17,926 INFO L225 Difference]: With dead ends: 553650 [2023-12-02 14:36:17,927 INFO L226 Difference]: Without dead ends: 276826 [2023-12-02 14:36:18,016 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 14:36:18,017 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 1471 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4055 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s 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, 4.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:36:18,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 489 Invalid, 4504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 4055 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-02 14:36:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276826 states. [2023-12-02 14:36:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276826 to 276826. [2023-12-02 14:36:20,611 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 14:36:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276826 states to 276826 states and 283393 transitions. [2023-12-02 14:36:21,289 INFO L78 Accepts]: Start accepts. Automaton has 276826 states and 283393 transitions. Word has length 3032 [2023-12-02 14:36:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:36:21,290 INFO L495 AbstractCegarLoop]: Abstraction has 276826 states and 283393 transitions. [2023-12-02 14:36:21,290 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 14:36:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 276826 states and 283393 transitions. [2023-12-02 14:36:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3048 [2023-12-02 14:36:21,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:36:21,572 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 14:36:21,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-12-02 14:36:21,573 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:36:21,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:36:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1273846933, now seen corresponding path program 1 times [2023-12-02 14:36:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:36:21,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408819737] [2023-12-02 14:36:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:36:21,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:36:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:36:29,479 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 14:36:29,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:36:29,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408819737] [2023-12-02 14:36:29,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408819737] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:36:29,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565870479] [2023-12-02 14:36:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:36:29,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:36:29,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:36:29,481 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:36:29,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 14:36:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:36:30,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 3457 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:36:30,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:36:30,825 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 14:36:30,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:36:30,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565870479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:36:30,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:36:30,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-12-02 14:36:30,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264894120] [2023-12-02 14:36:30,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:36:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:36:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:36:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:36:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:36:30,831 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 14:36:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:36:36,414 INFO L93 Difference]: Finished difference Result 555288 states and 568569 transitions. [2023-12-02 14:36:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:36:36,415 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 14:36:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:36:36,721 INFO L225 Difference]: With dead ends: 555288 [2023-12-02 14:36:36,722 INFO L226 Difference]: Without dead ends: 278464 [2023-12-02 14:36:36,861 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 14:36:36,862 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1535 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:36:36,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1535 Valid, 304 Invalid, 4999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 4215 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 14:36:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278464 states. [2023-12-02 14:36:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278464 to 278464. [2023-12-02 14:36:39,981 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 14:36:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278464 states to 278464 states and 284298 transitions. [2023-12-02 14:36:40,437 INFO L78 Accepts]: Start accepts. Automaton has 278464 states and 284298 transitions. Word has length 3047 [2023-12-02 14:36:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:36:40,438 INFO L495 AbstractCegarLoop]: Abstraction has 278464 states and 284298 transitions. [2023-12-02 14:36:40,439 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 14:36:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 278464 states and 284298 transitions. [2023-12-02 14:36:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3107 [2023-12-02 14:36:40,749 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:36:40,751 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 14:36:40,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 14:36:40,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 14:36:40,951 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:36:40,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:36:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1212779832, now seen corresponding path program 1 times [2023-12-02 14:36:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:36:40,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830010023] [2023-12-02 14:36:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:36:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:36:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:36:46,180 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 14:36:46,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:36:46,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830010023] [2023-12-02 14:36:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830010023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:36:46,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:36:46,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:36:46,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476627044] [2023-12-02 14:36:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:36:46,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:36:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:36:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:36:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:36:46,188 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 14:36:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:36:54,643 INFO L93 Difference]: Finished difference Result 558564 states and 570322 transitions. [2023-12-02 14:36:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:36:54,644 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 14:36:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:36:54,978 INFO L225 Difference]: With dead ends: 558564 [2023-12-02 14:36:54,978 INFO L226 Difference]: Without dead ends: 280102 [2023-12-02 14:36:55,064 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 14:36:55,064 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 3109 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7462 mSolverCounterSat, 1372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s 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, 6.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:36:55,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3109 Valid, 253 Invalid, 8834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1372 Valid, 7462 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-12-02 14:36:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280102 states. [2023-12-02 14:36:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280102 to 280102. [2023-12-02 14:36:57,498 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 14:36:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280102 states to 280102 states and 285560 transitions. [2023-12-02 14:36:57,786 INFO L78 Accepts]: Start accepts. Automaton has 280102 states and 285560 transitions. Word has length 3106 [2023-12-02 14:36:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:36:57,787 INFO L495 AbstractCegarLoop]: Abstraction has 280102 states and 285560 transitions. [2023-12-02 14:36:57,788 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 14:36:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 280102 states and 285560 transitions. [2023-12-02 14:36:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3186 [2023-12-02 14:36:58,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:36:58,398 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 14:36:58,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-12-02 14:36:58,398 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:36:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:36:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1927237599, now seen corresponding path program 1 times [2023-12-02 14:36:58,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:36:58,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301048481] [2023-12-02 14:36:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:36:58,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:36:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:07,548 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 14:37:07,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301048481] [2023-12-02 14:37:07,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301048481] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:37:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769562996] [2023-12-02 14:37:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:07,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:37:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:37:07,549 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:37:07,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 14:37:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:08,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 3627 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:37:08,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:37:08,914 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 14:37:08,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:37:08,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769562996] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:08,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:37:08,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-12-02 14:37:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106305623] [2023-12-02 14:37:08,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:08,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:37:08,921 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 14:37:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:14,775 INFO L93 Difference]: Finished difference Result 561840 states and 573038 transitions. [2023-12-02 14:37:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:14,776 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 14:37:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:15,123 INFO L225 Difference]: With dead ends: 561840 [2023-12-02 14:37:15,124 INFO L226 Difference]: Without dead ends: 281740 [2023-12-02 14:37:15,522 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 14:37:15,523 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1595 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4093 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s 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, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:37:15,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1595 Valid, 174 Invalid, 5208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1115 Valid, 4093 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 14:37:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281740 states. [2023-12-02 14:37:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281740 to 281740. [2023-12-02 14:37:18,003 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 14:37:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281740 states to 281740 states and 287138 transitions. [2023-12-02 14:37:18,296 INFO L78 Accepts]: Start accepts. Automaton has 281740 states and 287138 transitions. Word has length 3185 [2023-12-02 14:37:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:18,297 INFO L495 AbstractCegarLoop]: Abstraction has 281740 states and 287138 transitions. [2023-12-02 14:37:18,297 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 14:37:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 281740 states and 287138 transitions. [2023-12-02 14:37:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3277 [2023-12-02 14:37:18,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:18,906 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 14:37:18,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 14:37:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddeace64-28fe-4a0f-adca-49c91199c9af/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:37:19,107 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:37:19,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1900679922, now seen corresponding path program 1 times [2023-12-02 14:37:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:19,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983285349] [2023-12-02 14:37:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:19,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:24,006 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 14:37:24,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:24,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983285349] [2023-12-02 14:37:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983285349] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:24,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:24,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:37:24,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445184446] [2023-12-02 14:37:24,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:24,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:24,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:24,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:24,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:24,013 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 14:37:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:30,324 INFO L93 Difference]: Finished difference Result 638826 states and 650854 transitions. [2023-12-02 14:37:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:30,324 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 14:37:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:30,690 INFO L225 Difference]: With dead ends: 638826 [2023-12-02 14:37:30,691 INFO L226 Difference]: Without dead ends: 357088 [2023-12-02 14:37:30,741 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 14:37:30,741 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, 0.1s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:37:30,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1627 Valid, 406 Invalid, 5097 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [851 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 14:37:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357088 states.