./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire --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 6a475a1757f9d6a7e4fb14b3de484172261c724bb5d3b2a10ee5c8f5de9de51b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:43,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:43,341 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:08:43,350 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:43,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:43,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:43,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:43,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:43,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:43,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:43,396 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:43,397 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:43,397 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:43,399 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:43,399 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:43,399 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:43,400 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:43,400 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:43,401 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:43,401 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:43,402 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:43,402 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:43,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:43,404 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:43,404 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:08:43,405 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:43,405 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:08:43,406 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:43,406 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:43,406 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:43,408 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:43,408 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:08:43,408 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:43,409 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:43,409 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:43,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:43,410 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:43,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:43,410 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:43,410 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:43,411 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:43,411 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:43,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:43,412 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:43,412 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:43,412 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:43,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:43,413 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_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a475a1757f9d6a7e4fb14b3de484172261c724bb5d3b2a10ee5c8f5de9de51b [2023-11-23 21:08:43,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:43,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:43,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:43,771 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:43,771 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:43,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-11-23 21:08:46,905 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:47,154 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:47,158 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-11-23 21:08:47,179 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/data/f682d5646/b00876a321f14742ad3cba4d248dc0f9/FLAGdc474e964 [2023-11-23 21:08:47,195 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/data/f682d5646/b00876a321f14742ad3cba4d248dc0f9 [2023-11-23 21:08:47,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:47,202 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:47,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:47,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:47,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:47,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1b03cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47, skipping insertion in model container [2023-11-23 21:08:47,213 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,287 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:47,599 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_a808d587-bb9a-484a-b10a-504cb18d92e3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-11-23 21:08:47,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:47,688 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:47,765 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_a808d587-bb9a-484a-b10a-504cb18d92e3/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2023-11-23 21:08:47,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:47,845 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:47,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47 WrapperNode [2023-11-23 21:08:47,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:47,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:47,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:47,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:47,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,937 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 843 [2023-11-23 21:08:47,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:47,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:47,938 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:47,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:47,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,956 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,956 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:47,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:48,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:48,012 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:48,016 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:48,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:48,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:48,039 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:48,039 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:48,040 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (1/1) ... [2023-11-23 21:08:48,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:48,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:48,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:48,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a808d587-bb9a-484a-b10a-504cb18d92e3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:08:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:48,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:48,311 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:48,313 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:49,168 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:49,381 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:49,381 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:08:49,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:49 BoogieIcfgContainer [2023-11-23 21:08:49,383 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:49,386 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:49,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:49,389 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:49,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:47" (1/3) ... [2023-11-23 21:08:49,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4d079b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:49, skipping insertion in model container [2023-11-23 21:08:49,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:47" (2/3) ... [2023-11-23 21:08:49,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4d079b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:49, skipping insertion in model container [2023-11-23 21:08:49,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:49" (3/3) ... [2023-11-23 21:08:49,392 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-11-23 21:08:49,416 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:49,416 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:49,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:49,480 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;@4dc664e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:49,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 154 states have (on average 1.7077922077922079) internal successors, (263), 155 states have internal predecessors, (263), 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) [2023-11-23 21:08:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:08:49,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:49,496 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] [2023-11-23 21:08:49,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:49,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:49,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1507889232, now seen corresponding path program 1 times [2023-11-23 21:08:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:49,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686738732] [2023-11-23 21:08:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:49,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:50,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686738732] [2023-11-23 21:08:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686738732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:50,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:50,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:08:50,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222286439] [2023-11-23 21:08:50,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:50,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:08:50,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:08:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:50,540 INFO L87 Difference]: Start difference. First operand has 156 states, 154 states have (on average 1.7077922077922079) internal successors, (263), 155 states have internal predecessors, (263), 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) Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-23 21:08:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:50,914 INFO L93 Difference]: Finished difference Result 548 states and 877 transitions. [2023-11-23 21:08:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:08:50,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 67 [2023-11-23 21:08:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:50,942 INFO L225 Difference]: With dead ends: 548 [2023-11-23 21:08:50,943 INFO L226 Difference]: Without dead ends: 456 [2023-11-23 21:08:50,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:50,951 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 1043 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:50,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 1040 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:08:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-11-23 21:08:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 448. [2023-11-23 21:08:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.395973154362416) internal successors, (624), 447 states have internal predecessors, (624), 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) [2023-11-23 21:08:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 624 transitions. [2023-11-23 21:08:51,058 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 624 transitions. Word has length 67 [2023-11-23 21:08:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:51,059 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 624 transitions. [2023-11-23 21:08:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2023-11-23 21:08:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 624 transitions. [2023-11-23 21:08:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:08:51,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:51,064 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] [2023-11-23 21:08:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:08:51,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:51,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 394571889, now seen corresponding path program 1 times [2023-11-23 21:08:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319234559] [2023-11-23 21:08:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:51,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:51,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:51,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319234559] [2023-11-23 21:08:51,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319234559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:51,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:51,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:51,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503383273] [2023-11-23 21:08:51,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:51,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:51,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:51,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:51,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:51,295 INFO L87 Difference]: Start difference. First operand 448 states and 624 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:51,567 INFO L93 Difference]: Finished difference Result 1099 states and 1573 transitions. [2023-11-23 21:08:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:08:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:51,573 INFO L225 Difference]: With dead ends: 1099 [2023-11-23 21:08:51,573 INFO L226 Difference]: Without dead ends: 705 [2023-11-23 21:08:51,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:51,577 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 545 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:51,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 217 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:08:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-11-23 21:08:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 703. [2023-11-23 21:08:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 1.4245014245014245) internal successors, (1000), 702 states have internal predecessors, (1000), 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) [2023-11-23 21:08:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1000 transitions. [2023-11-23 21:08:51,614 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1000 transitions. Word has length 68 [2023-11-23 21:08:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:51,614 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 1000 transitions. [2023-11-23 21:08:51,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1000 transitions. [2023-11-23 21:08:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:08:51,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:51,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:51,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:08:51,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:51,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:51,621 INFO L85 PathProgramCache]: Analyzing trace with hash 662788864, now seen corresponding path program 1 times [2023-11-23 21:08:51,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:51,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871102912] [2023-11-23 21:08:51,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:51,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:51,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:51,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871102912] [2023-11-23 21:08:51,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871102912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:51,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:51,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:51,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651633107] [2023-11-23 21:08:51,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:51,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:51,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:51,830 INFO L87 Difference]: Start difference. First operand 703 states and 1000 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:52,098 INFO L93 Difference]: Finished difference Result 1841 states and 2674 transitions. [2023-11-23 21:08:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:52,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:08:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:52,109 INFO L225 Difference]: With dead ends: 1841 [2023-11-23 21:08:52,110 INFO L226 Difference]: Without dead ends: 1215 [2023-11-23 21:08:52,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:52,122 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 528 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:52,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 225 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:08:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2023-11-23 21:08:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1213. [2023-11-23 21:08:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 1.4422442244224423) internal successors, (1748), 1212 states have internal predecessors, (1748), 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) [2023-11-23 21:08:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1748 transitions. [2023-11-23 21:08:52,169 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1748 transitions. Word has length 68 [2023-11-23 21:08:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:52,175 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1748 transitions. [2023-11-23 21:08:52,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1748 transitions. [2023-11-23 21:08:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:08:52,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:52,184 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] [2023-11-23 21:08:52,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:08:52,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:52,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1110574814, now seen corresponding path program 1 times [2023-11-23 21:08:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:52,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446962492] [2023-11-23 21:08:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:52,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:52,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:52,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446962492] [2023-11-23 21:08:52,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446962492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:52,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:52,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186979911] [2023-11-23 21:08:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:52,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:52,423 INFO L87 Difference]: Start difference. First operand 1213 states and 1748 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:52,661 INFO L93 Difference]: Finished difference Result 3307 states and 4836 transitions. [2023-11-23 21:08:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:08:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:52,674 INFO L225 Difference]: With dead ends: 3307 [2023-11-23 21:08:52,674 INFO L226 Difference]: Without dead ends: 2235 [2023-11-23 21:08:52,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:52,688 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 535 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:52,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 234 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:08:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2023-11-23 21:08:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2233. [2023-11-23 21:08:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 1.4520609318996416) internal successors, (3241), 2232 states have internal predecessors, (3241), 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) [2023-11-23 21:08:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 3241 transitions. [2023-11-23 21:08:52,750 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 3241 transitions. Word has length 68 [2023-11-23 21:08:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:52,752 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 3241 transitions. [2023-11-23 21:08:52,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 3241 transitions. [2023-11-23 21:08:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:08:52,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:52,754 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] [2023-11-23 21:08:52,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:08:52,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:52,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -949159985, now seen corresponding path program 1 times [2023-11-23 21:08:52,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:52,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902531686] [2023-11-23 21:08:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:52,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:52,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902531686] [2023-11-23 21:08:52,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902531686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:52,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:52,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:52,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927224809] [2023-11-23 21:08:52,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:52,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:52,925 INFO L87 Difference]: Start difference. First operand 2233 states and 3241 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:53,204 INFO L93 Difference]: Finished difference Result 6401 states and 9367 transitions. [2023-11-23 21:08:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-23 21:08:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:53,229 INFO L225 Difference]: With dead ends: 6401 [2023-11-23 21:08:53,229 INFO L226 Difference]: Without dead ends: 4275 [2023-11-23 21:08:53,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:53,233 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 505 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:53,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 233 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:08:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-11-23 21:08:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4273. [2023-11-23 21:08:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.452247191011236) internal successors, (6204), 4272 states have internal predecessors, (6204), 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) [2023-11-23 21:08:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 6204 transitions. [2023-11-23 21:08:53,347 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 6204 transitions. Word has length 68 [2023-11-23 21:08:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:53,347 INFO L495 AbstractCegarLoop]: Abstraction has 4273 states and 6204 transitions. [2023-11-23 21:08:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-23 21:08:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 6204 transitions. [2023-11-23 21:08:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:08:53,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:53,349 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] [2023-11-23 21:08:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:08:53,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:53,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash -621994936, now seen corresponding path program 1 times [2023-11-23 21:08:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:53,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718122986] [2023-11-23 21:08:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:53,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718122986] [2023-11-23 21:08:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718122986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:53,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:53,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:53,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039323212] [2023-11-23 21:08:53,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:53,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:53,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:53,498 INFO L87 Difference]: Start difference. First operand 4273 states and 6204 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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) [2023-11-23 21:08:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:53,691 INFO L93 Difference]: Finished difference Result 8483 states and 12337 transitions. [2023-11-23 21:08:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2023-11-23 21:08:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:53,720 INFO L225 Difference]: With dead ends: 8483 [2023-11-23 21:08:53,720 INFO L226 Difference]: Without dead ends: 4273 [2023-11-23 21:08:53,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:08:53,726 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 439 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:53,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 168 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:08:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2023-11-23 21:08:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 4273. [2023-11-23 21:08:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.4520131086142323) internal successors, (6203), 4272 states have internal predecessors, (6203), 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) [2023-11-23 21:08:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 6203 transitions. [2023-11-23 21:08:53,902 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 6203 transitions. Word has length 69 [2023-11-23 21:08:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:53,903 INFO L495 AbstractCegarLoop]: Abstraction has 4273 states and 6203 transitions. [2023-11-23 21:08:53,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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) [2023-11-23 21:08:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 6203 transitions. [2023-11-23 21:08:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:08:53,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:53,904 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] [2023-11-23 21:08:53,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:08:53,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:53,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash -623540156, now seen corresponding path program 1 times [2023-11-23 21:08:53,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:53,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511105906] [2023-11-23 21:08:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:53,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:55,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:55,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511105906] [2023-11-23 21:08:55,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511105906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:55,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:55,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 21:08:55,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941777849] [2023-11-23 21:08:55,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:55,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:08:55,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:55,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:08:55,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:08:55,828 INFO L87 Difference]: Start difference. First operand 4273 states and 6203 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:08:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:57,019 INFO L93 Difference]: Finished difference Result 9785 states and 14177 transitions. [2023-11-23 21:08:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:08:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2023-11-23 21:08:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:57,073 INFO L225 Difference]: With dead ends: 9785 [2023-11-23 21:08:57,073 INFO L226 Difference]: Without dead ends: 9783 [2023-11-23 21:08:57,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:08:57,077 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1001 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:57,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1733 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:08:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9783 states. [2023-11-23 21:08:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9783 to 7259. [2023-11-23 21:08:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7259 states, 7258 states have (on average 1.4472306420501515) internal successors, (10504), 7258 states have internal predecessors, (10504), 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) [2023-11-23 21:08:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 10504 transitions. [2023-11-23 21:08:57,287 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 10504 transitions. Word has length 69 [2023-11-23 21:08:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:57,288 INFO L495 AbstractCegarLoop]: Abstraction has 7259 states and 10504 transitions. [2023-11-23 21:08:57,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:08:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 10504 transitions. [2023-11-23 21:08:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:08:57,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:57,294 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] [2023-11-23 21:08:57,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:08:57,295 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:57,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1594221604, now seen corresponding path program 1 times [2023-11-23 21:08:57,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:57,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398088893] [2023-11-23 21:08:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:57,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:59,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:59,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398088893] [2023-11-23 21:08:59,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398088893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:59,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:59,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 21:08:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281399870] [2023-11-23 21:08:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:59,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:08:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:08:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:08:59,067 INFO L87 Difference]: Start difference. First operand 7259 states and 10504 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:09:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:00,341 INFO L93 Difference]: Finished difference Result 11360 states and 16417 transitions. [2023-11-23 21:09:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:09:00,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2023-11-23 21:09:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:00,381 INFO L225 Difference]: With dead ends: 11360 [2023-11-23 21:09:00,381 INFO L226 Difference]: Without dead ends: 11358 [2023-11-23 21:09:00,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:09:00,386 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1047 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 1987 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:09:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11358 states. [2023-11-23 21:09:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11358 to 7284. [2023-11-23 21:09:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7284 states, 7283 states have (on average 1.4465192915007552) internal successors, (10535), 7283 states have internal predecessors, (10535), 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) [2023-11-23 21:09:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7284 states to 7284 states and 10535 transitions. [2023-11-23 21:09:00,562 INFO L78 Accepts]: Start accepts. Automaton has 7284 states and 10535 transitions. Word has length 69 [2023-11-23 21:09:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:00,562 INFO L495 AbstractCegarLoop]: Abstraction has 7284 states and 10535 transitions. [2023-11-23 21:09:00,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:09:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7284 states and 10535 transitions. [2023-11-23 21:09:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:09:00,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:00,564 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] [2023-11-23 21:09:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:09:00,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:00,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -233802780, now seen corresponding path program 1 times [2023-11-23 21:09:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018144956] [2023-11-23 21:09:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:02,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:02,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018144956] [2023-11-23 21:09:02,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018144956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:02,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:02,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:09:02,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844312573] [2023-11-23 21:09:02,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:02,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:09:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:02,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:09:02,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:09:02,250 INFO L87 Difference]: Start difference. First operand 7284 states and 10535 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 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) [2023-11-23 21:09:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:03,873 INFO L93 Difference]: Finished difference Result 15027 states and 21705 transitions. [2023-11-23 21:09:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 21:09:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 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 69 [2023-11-23 21:09:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:03,910 INFO L225 Difference]: With dead ends: 15027 [2023-11-23 21:09:03,911 INFO L226 Difference]: Without dead ends: 15025 [2023-11-23 21:09:03,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 21:09:03,918 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1263 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:03,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1900 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:09:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15025 states. [2023-11-23 21:09:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15025 to 7307. [2023-11-23 21:09:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7307 states, 7306 states have (on average 1.4452504790583083) internal successors, (10559), 7306 states have internal predecessors, (10559), 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) [2023-11-23 21:09:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7307 states to 7307 states and 10559 transitions. [2023-11-23 21:09:04,100 INFO L78 Accepts]: Start accepts. Automaton has 7307 states and 10559 transitions. Word has length 69 [2023-11-23 21:09:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:04,100 INFO L495 AbstractCegarLoop]: Abstraction has 7307 states and 10559 transitions. [2023-11-23 21:09:04,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 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) [2023-11-23 21:09:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7307 states and 10559 transitions. [2023-11-23 21:09:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:09:04,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:04,103 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] [2023-11-23 21:09:04,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:09:04,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:04,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1406564348, now seen corresponding path program 1 times [2023-11-23 21:09:04,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:04,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449670139] [2023-11-23 21:09:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:04,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:05,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:05,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449670139] [2023-11-23 21:09:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449670139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:05,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:05,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 21:09:05,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775187312] [2023-11-23 21:09:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:05,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:09:05,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:09:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:09:05,503 INFO L87 Difference]: Start difference. First operand 7307 states and 10559 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:09:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:06,573 INFO L93 Difference]: Finished difference Result 10066 states and 14510 transitions. [2023-11-23 21:09:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:09:06,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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 69 [2023-11-23 21:09:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:06,591 INFO L225 Difference]: With dead ends: 10066 [2023-11-23 21:09:06,592 INFO L226 Difference]: Without dead ends: 9120 [2023-11-23 21:09:06,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:09:06,596 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 847 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:06,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 2205 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:09:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2023-11-23 21:09:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 8175. [2023-11-23 21:09:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 1.4429899681918277) internal successors, (11795), 8174 states have internal predecessors, (11795), 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) [2023-11-23 21:09:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 11795 transitions. [2023-11-23 21:09:06,742 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 11795 transitions. Word has length 69 [2023-11-23 21:09:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:06,742 INFO L495 AbstractCegarLoop]: Abstraction has 8175 states and 11795 transitions. [2023-11-23 21:09:06,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 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) [2023-11-23 21:09:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 11795 transitions. [2023-11-23 21:09:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:09:06,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:06,744 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] [2023-11-23 21:09:06,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:09:06,745 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:06,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash 694965502, now seen corresponding path program 1 times [2023-11-23 21:09:06,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:06,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586004286] [2023-11-23 21:09:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:06,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:08,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586004286] [2023-11-23 21:09:08,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586004286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:08,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:08,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:09:08,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675620898] [2023-11-23 21:09:08,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:09:08,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:09:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:09:08,189 INFO L87 Difference]: Start difference. First operand 8175 states and 11795 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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) [2023-11-23 21:09:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:09,953 INFO L93 Difference]: Finished difference Result 15742 states and 22784 transitions. [2023-11-23 21:09:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 21:09:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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 70 [2023-11-23 21:09:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:09,985 INFO L225 Difference]: With dead ends: 15742 [2023-11-23 21:09:09,986 INFO L226 Difference]: Without dead ends: 15740 [2023-11-23 21:09:09,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:09:09,991 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1061 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:09,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 2554 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:09:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15740 states. [2023-11-23 21:09:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15740 to 9310. [2023-11-23 21:09:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9310 states, 9309 states have (on average 1.4447309055752497) internal successors, (13449), 9309 states have internal predecessors, (13449), 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) [2023-11-23 21:09:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 13449 transitions. [2023-11-23 21:09:10,232 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 13449 transitions. Word has length 70 [2023-11-23 21:09:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:10,233 INFO L495 AbstractCegarLoop]: Abstraction has 9310 states and 13449 transitions. [2023-11-23 21:09:10,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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) [2023-11-23 21:09:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 13449 transitions. [2023-11-23 21:09:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:09:10,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:10,235 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] [2023-11-23 21:09:10,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:09:10,235 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:10,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:10,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1989979928, now seen corresponding path program 1 times [2023-11-23 21:09:10,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:10,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227195024] [2023-11-23 21:09:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:11,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227195024] [2023-11-23 21:09:11,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227195024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:11,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:11,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-23 21:09:11,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638550470] [2023-11-23 21:09:11,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:11,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:09:11,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:09:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:09:11,870 INFO L87 Difference]: Start difference. First operand 9310 states and 13449 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2023-11-23 21:09:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:13,580 INFO L93 Difference]: Finished difference Result 15630 states and 22543 transitions. [2023-11-23 21:09:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 21:09:13,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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 71 [2023-11-23 21:09:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:13,610 INFO L225 Difference]: With dead ends: 15630 [2023-11-23 21:09:13,610 INFO L226 Difference]: Without dead ends: 15628 [2023-11-23 21:09:13,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 21:09:13,616 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 1065 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:13,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 2252 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:09:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15628 states. [2023-11-23 21:09:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15628 to 9310. [2023-11-23 21:09:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9310 states, 9309 states have (on average 1.4447309055752497) internal successors, (13449), 9309 states have internal predecessors, (13449), 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) [2023-11-23 21:09:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 13449 transitions. [2023-11-23 21:09:13,797 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 13449 transitions. Word has length 71 [2023-11-23 21:09:13,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:13,797 INFO L495 AbstractCegarLoop]: Abstraction has 9310 states and 13449 transitions. [2023-11-23 21:09:13,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2023-11-23 21:09:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 13449 transitions. [2023-11-23 21:09:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:09:13,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:13,799 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] [2023-11-23 21:09:13,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:09:13,800 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:13,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1010806024, now seen corresponding path program 1 times [2023-11-23 21:09:13,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:13,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276084420] [2023-11-23 21:09:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:15,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:15,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276084420] [2023-11-23 21:09:15,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276084420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:15,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:15,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-11-23 21:09:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529380756] [2023-11-23 21:09:15,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:15,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 21:09:15,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 21:09:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:09:15,954 INFO L87 Difference]: Start difference. First operand 9310 states and 13449 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2023-11-23 21:09:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:18,672 INFO L93 Difference]: Finished difference Result 13336 states and 19203 transitions. [2023-11-23 21:09:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:09:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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 71 [2023-11-23 21:09:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:18,694 INFO L225 Difference]: With dead ends: 13336 [2023-11-23 21:09:18,694 INFO L226 Difference]: Without dead ends: 12406 [2023-11-23 21:09:18,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:09:18,700 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 1217 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:18,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 1712 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:09:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12406 states. [2023-11-23 21:09:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12406 to 9335. [2023-11-23 21:09:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9335 states, 9334 states have (on average 1.4440754231840582) internal successors, (13479), 9334 states have internal predecessors, (13479), 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) [2023-11-23 21:09:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9335 states to 9335 states and 13479 transitions. [2023-11-23 21:09:18,869 INFO L78 Accepts]: Start accepts. Automaton has 9335 states and 13479 transitions. Word has length 71 [2023-11-23 21:09:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:18,870 INFO L495 AbstractCegarLoop]: Abstraction has 9335 states and 13479 transitions. [2023-11-23 21:09:18,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2023-11-23 21:09:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9335 states and 13479 transitions. [2023-11-23 21:09:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:09:18,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:18,872 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] [2023-11-23 21:09:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 21:09:18,873 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:18,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1127228088, now seen corresponding path program 1 times [2023-11-23 21:09:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965476177] [2023-11-23 21:09:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:18,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:20,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965476177] [2023-11-23 21:09:20,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965476177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:20,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:20,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-23 21:09:20,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432126004] [2023-11-23 21:09:20,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:20,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:09:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:09:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:09:20,360 INFO L87 Difference]: Start difference. First operand 9335 states and 13479 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2023-11-23 21:09:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:21,631 INFO L93 Difference]: Finished difference Result 15674 states and 22595 transitions. [2023-11-23 21:09:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:09:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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 71 [2023-11-23 21:09:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:21,655 INFO L225 Difference]: With dead ends: 15674 [2023-11-23 21:09:21,655 INFO L226 Difference]: Without dead ends: 15672 [2023-11-23 21:09:21,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:09:21,660 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1073 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:21,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 2335 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:09:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15672 states. [2023-11-23 21:09:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15672 to 9349. [2023-11-23 21:09:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9349 states, 9348 states have (on average 1.4438382541720154) internal successors, (13497), 9348 states have internal predecessors, (13497), 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) [2023-11-23 21:09:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9349 states to 9349 states and 13497 transitions. [2023-11-23 21:09:21,814 INFO L78 Accepts]: Start accepts. Automaton has 9349 states and 13497 transitions. Word has length 71 [2023-11-23 21:09:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:21,814 INFO L495 AbstractCegarLoop]: Abstraction has 9349 states and 13497 transitions. [2023-11-23 21:09:21,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2023-11-23 21:09:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 9349 states and 13497 transitions. [2023-11-23 21:09:21,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:09:21,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:21,816 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] [2023-11-23 21:09:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:09:21,817 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:21,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash -45533480, now seen corresponding path program 1 times [2023-11-23 21:09:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153253523] [2023-11-23 21:09:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:23,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153253523] [2023-11-23 21:09:23,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153253523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:23,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:23,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-23 21:09:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787670970] [2023-11-23 21:09:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:23,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:09:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:09:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:09:23,398 INFO L87 Difference]: Start difference. First operand 9349 states and 13497 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2023-11-23 21:09:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:24,913 INFO L93 Difference]: Finished difference Result 12139 states and 17483 transitions. [2023-11-23 21:09:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:09:24,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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 71 [2023-11-23 21:09:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:24,928 INFO L225 Difference]: With dead ends: 12139 [2023-11-23 21:09:24,928 INFO L226 Difference]: Without dead ends: 11193 [2023-11-23 21:09:24,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:09:24,932 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 804 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:24,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 2318 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:09:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11193 states. [2023-11-23 21:09:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11193 to 9352. [2023-11-23 21:09:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9352 states, 9351 states have (on average 1.4436958614051973) internal successors, (13500), 9351 states have internal predecessors, (13500), 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) [2023-11-23 21:09:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9352 states to 9352 states and 13500 transitions. [2023-11-23 21:09:25,087 INFO L78 Accepts]: Start accepts. Automaton has 9352 states and 13500 transitions. Word has length 71 [2023-11-23 21:09:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:25,087 INFO L495 AbstractCegarLoop]: Abstraction has 9352 states and 13500 transitions. [2023-11-23 21:09:25,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2023-11-23 21:09:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9352 states and 13500 transitions. [2023-11-23 21:09:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:09:25,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:25,089 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] [2023-11-23 21:09:25,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 21:09:25,090 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:25,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash -705016168, now seen corresponding path program 1 times [2023-11-23 21:09:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558774500] [2023-11-23 21:09:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:25,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:26,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:26,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558774500] [2023-11-23 21:09:26,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558774500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:26,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:26,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:09:26,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890223597] [2023-11-23 21:09:26,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:26,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:09:26,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:09:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:09:26,781 INFO L87 Difference]: Start difference. First operand 9352 states and 13500 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2023-11-23 21:09:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:28,186 INFO L93 Difference]: Finished difference Result 12107 states and 17395 transitions. [2023-11-23 21:09:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:09:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 71 [2023-11-23 21:09:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:28,200 INFO L225 Difference]: With dead ends: 12107 [2023-11-23 21:09:28,200 INFO L226 Difference]: Without dead ends: 12105 [2023-11-23 21:09:28,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:09:28,204 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 810 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:28,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 2342 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:09:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12105 states. [2023-11-23 21:09:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12105 to 9854. [2023-11-23 21:09:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9854 states, 9853 states have (on average 1.4411854257586523) internal successors, (14200), 9853 states have internal predecessors, (14200), 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) [2023-11-23 21:09:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9854 states to 9854 states and 14200 transitions. [2023-11-23 21:09:28,395 INFO L78 Accepts]: Start accepts. Automaton has 9854 states and 14200 transitions. Word has length 71 [2023-11-23 21:09:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:28,396 INFO L495 AbstractCegarLoop]: Abstraction has 9854 states and 14200 transitions. [2023-11-23 21:09:28,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2023-11-23 21:09:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9854 states and 14200 transitions. [2023-11-23 21:09:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 21:09:28,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:28,398 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] [2023-11-23 21:09:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 21:09:28,399 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:28,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash -159196814, now seen corresponding path program 1 times [2023-11-23 21:09:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:28,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656565453] [2023-11-23 21:09:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:28,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat