./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.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_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/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_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/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_c18a4859-4383-4915-a5c1-3bf02480eb06/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 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:27:21,451 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:27:21,570 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:27:21,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:27:21,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:27:21,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:27:21,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:27:21,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:27:21,625 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:27:21,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:27:21,630 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:27:21,632 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:27:21,632 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:27:21,634 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:27:21,634 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:27:21,635 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:27:21,635 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:27:21,636 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:27:21,637 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:27:21,637 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:27:21,638 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:27:21,638 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:27:21,651 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:27:21,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:27:21,652 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:27:21,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:27:21,653 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:27:21,653 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:27:21,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:27:21,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:27:21,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:27:21,656 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:27:21,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:27:21,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:27:21,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:27:21,657 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:27:21,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:27:21,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:27:21,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:27:21,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:27:21,659 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:27:21,659 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:27:21,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:27:21,660 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:27:21,660 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:27:21,660 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:27:21,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:27:21,661 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_c18a4859-4383-4915-a5c1-3bf02480eb06/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35eb4fe61244b47e62120cf84d8eaed931ae7a7b0a5140717764703691b11b75 [2023-11-23 21:27:22,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:27:22,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:27:22,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:27:22,053 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:27:22,053 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:27:22,055 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-11-23 21:27:25,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:27:25,507 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:27:25,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-11-23 21:27:25,522 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/data/5bd07344d/cece8f9a7184442795444312e4284999/FLAGe137e09af [2023-11-23 21:27:25,535 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/data/5bd07344d/cece8f9a7184442795444312e4284999 [2023-11-23 21:27:25,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:27:25,539 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:27:25,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:27:25,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:27:25,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:27:25,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:27:25" (1/1) ... [2023-11-23 21:27:25,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730559ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:25, skipping insertion in model container [2023-11-23 21:27:25,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:27:25" (1/1) ... [2023-11-23 21:27:25,620 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:27:25,893 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_c18a4859-4383-4915-a5c1-3bf02480eb06/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2023-11-23 21:27:26,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:27:26,032 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:27:26,116 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_c18a4859-4383-4915-a5c1-3bf02480eb06/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2023-11-23 21:27:26,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:27:26,203 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:27:26,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26 WrapperNode [2023-11-23 21:27:26,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:27:26,204 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:27:26,204 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:27:26,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:27:26,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,294 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1009 [2023-11-23 21:27:26,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:27:26,296 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:27:26,296 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:27:26,296 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:27:26,314 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,359 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,400 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,408 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:27:26,416 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:27:26,416 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:27:26,416 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:27:26,417 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (1/1) ... [2023-11-23 21:27:26,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:27:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:27:26,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:27:26,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18a4859-4383-4915-a5c1-3bf02480eb06/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:27:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:27:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:27:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:27:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:27:26,721 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:27:26,723 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:27:27,576 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:27:27,947 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:27:27,947 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:27:27,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:27 BoogieIcfgContainer [2023-11-23 21:27:27,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:27:27,954 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:27:27,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:27:27,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:27:27,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:27:25" (1/3) ... [2023-11-23 21:27:27,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa43d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:27, skipping insertion in model container [2023-11-23 21:27:27,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:26" (2/3) ... [2023-11-23 21:27:27,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa43d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:27, skipping insertion in model container [2023-11-23 21:27:27,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:27" (3/3) ... [2023-11-23 21:27:27,964 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-11-23 21:27:27,985 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:27:27,985 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:27:28,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:27:28,071 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;@6479a769, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:27:28,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:27:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 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 21:27:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-23 21:27:28,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:28,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:28,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:28,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash -287928466, now seen corresponding path program 1 times [2023-11-23 21:27:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197161459] [2023-11-23 21:27:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:28,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:29,213 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 21:27:29,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:29,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197161459] [2023-11-23 21:27:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197161459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:29,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:29,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:27:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294046669] [2023-11-23 21:27:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:29,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:27:29,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:29,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:27:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:27:29,259 INFO L87 Difference]: Start difference. First operand has 189 states, 187 states have (on average 1.7112299465240641) internal successors, (320), 188 states have internal predecessors, (320), 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 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 21:27:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:29,858 INFO L93 Difference]: Finished difference Result 751 states and 1205 transitions. [2023-11-23 21:27:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:27:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 81 [2023-11-23 21:27:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:29,880 INFO L225 Difference]: With dead ends: 751 [2023-11-23 21:27:29,880 INFO L226 Difference]: Without dead ends: 643 [2023-11-23 21:27:29,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:27:29,888 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 1604 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:29,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1604 Valid, 1666 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:27:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-11-23 21:27:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 633. [2023-11-23 21:27:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 1.4082278481012658) internal successors, (890), 632 states have internal predecessors, (890), 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 21:27:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 890 transitions. [2023-11-23 21:27:30,006 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 890 transitions. Word has length 81 [2023-11-23 21:27:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:30,007 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 890 transitions. [2023-11-23 21:27:30,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 21:27:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 890 transitions. [2023-11-23 21:27:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 21:27:30,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:30,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:27:30,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:30,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 132050834, now seen corresponding path program 1 times [2023-11-23 21:27:30,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:30,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264559990] [2023-11-23 21:27:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:30,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:30,252 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 21:27:30,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264559990] [2023-11-23 21:27:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264559990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:30,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:30,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321892527] [2023-11-23 21:27:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:30,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:27:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:27:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:27:30,257 INFO L87 Difference]: Start difference. First operand 633 states and 890 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:30,601 INFO L93 Difference]: Finished difference Result 1553 states and 2241 transitions. [2023-11-23 21:27:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:27:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 82 [2023-11-23 21:27:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:30,609 INFO L225 Difference]: With dead ends: 1553 [2023-11-23 21:27:30,609 INFO L226 Difference]: Without dead ends: 1006 [2023-11-23 21:27:30,612 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 21:27:30,614 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 656 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:30,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 270 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:27:30,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2023-11-23 21:27:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1004. [2023-11-23 21:27:30,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.4376869391824527) internal successors, (1442), 1003 states have internal predecessors, (1442), 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 21:27:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1442 transitions. [2023-11-23 21:27:30,659 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1442 transitions. Word has length 82 [2023-11-23 21:27:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:30,660 INFO L495 AbstractCegarLoop]: Abstraction has 1004 states and 1442 transitions. [2023-11-23 21:27:30,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1442 transitions. [2023-11-23 21:27:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 21:27:30,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:30,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:30,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:27:30,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:30,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1214095645, now seen corresponding path program 1 times [2023-11-23 21:27:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:30,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563383562] [2023-11-23 21:27:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:30,933 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 21:27:30,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563383562] [2023-11-23 21:27:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563383562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:30,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:30,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:30,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265226774] [2023-11-23 21:27:30,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:30,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:27:30,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:27:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:27:30,939 INFO L87 Difference]: Start difference. First operand 1004 states and 1442 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:31,210 INFO L93 Difference]: Finished difference Result 2636 states and 3862 transitions. [2023-11-23 21:27:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:27:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 82 [2023-11-23 21:27:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:31,224 INFO L225 Difference]: With dead ends: 2636 [2023-11-23 21:27:31,225 INFO L226 Difference]: Without dead ends: 1748 [2023-11-23 21:27:31,233 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 21:27:31,237 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 639 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:31,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 278 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:27:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2023-11-23 21:27:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1746. [2023-11-23 21:27:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 1.4567335243553008) internal successors, (2542), 1745 states have internal predecessors, (2542), 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 21:27:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2542 transitions. [2023-11-23 21:27:31,294 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2542 transitions. Word has length 82 [2023-11-23 21:27:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:31,302 INFO L495 AbstractCegarLoop]: Abstraction has 1746 states and 2542 transitions. [2023-11-23 21:27:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2542 transitions. [2023-11-23 21:27:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 21:27:31,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:31,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:31,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:27:31,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:31,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:31,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1555513659, now seen corresponding path program 1 times [2023-11-23 21:27:31,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:31,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539504714] [2023-11-23 21:27:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:31,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:31,617 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 21:27:31,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:31,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539504714] [2023-11-23 21:27:31,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539504714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:31,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:31,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:31,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646827987] [2023-11-23 21:27:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:31,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:27:31,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:27:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:27:31,621 INFO L87 Difference]: Start difference. First operand 1746 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:31,880 INFO L93 Difference]: Finished difference Result 4784 states and 7062 transitions. [2023-11-23 21:27:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:27:31,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 82 [2023-11-23 21:27:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:31,899 INFO L225 Difference]: With dead ends: 4784 [2023-11-23 21:27:31,900 INFO L226 Difference]: Without dead ends: 3232 [2023-11-23 21:27:31,902 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 21:27:31,903 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 646 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:31,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 287 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:27:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2023-11-23 21:27:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3230. [2023-11-23 21:27:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.4673273459275318) internal successors, (4738), 3229 states have internal predecessors, (4738), 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 21:27:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 4738 transitions. [2023-11-23 21:27:31,991 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 4738 transitions. Word has length 82 [2023-11-23 21:27:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:31,992 INFO L495 AbstractCegarLoop]: Abstraction has 3230 states and 4738 transitions. [2023-11-23 21:27:31,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 4738 transitions. [2023-11-23 21:27:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 21:27:31,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:31,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:27:31,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:31,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:31,995 INFO L85 PathProgramCache]: Analyzing trace with hash -369548300, now seen corresponding path program 1 times [2023-11-23 21:27:31,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:31,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869052445] [2023-11-23 21:27:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:32,188 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 21:27:32,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:32,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869052445] [2023-11-23 21:27:32,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869052445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:32,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:32,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:32,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791098984] [2023-11-23 21:27:32,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:32,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:27:32,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:27:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:27:32,193 INFO L87 Difference]: Start difference. First operand 3230 states and 4738 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:32,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:32,481 INFO L93 Difference]: Finished difference Result 9277 states and 13713 transitions. [2023-11-23 21:27:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:27:32,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 82 [2023-11-23 21:27:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:32,517 INFO L225 Difference]: With dead ends: 9277 [2023-11-23 21:27:32,517 INFO L226 Difference]: Without dead ends: 6200 [2023-11-23 21:27:32,523 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 21:27:32,524 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 616 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:32,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 286 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:27:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2023-11-23 21:27:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 6198. [2023-11-23 21:27:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 6197 states have (on average 1.4690979506212682) internal successors, (9104), 6197 states have internal predecessors, (9104), 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 21:27:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 9104 transitions. [2023-11-23 21:27:32,707 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 9104 transitions. Word has length 82 [2023-11-23 21:27:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:32,708 INFO L495 AbstractCegarLoop]: Abstraction has 6198 states and 9104 transitions. [2023-11-23 21:27:32,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 9104 transitions. [2023-11-23 21:27:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 21:27:32,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:32,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:32,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:27:32,710 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:32,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:32,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1738975743, now seen corresponding path program 1 times [2023-11-23 21:27:32,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:32,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280798536] [2023-11-23 21:27:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:32,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:32,926 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 21:27:32,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280798536] [2023-11-23 21:27:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280798536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:32,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:32,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275251306] [2023-11-23 21:27:32,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:27:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:27:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:27:32,929 INFO L87 Difference]: Start difference. First operand 6198 states and 9104 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:33,295 INFO L93 Difference]: Finished difference Result 18271 states and 26937 transitions. [2023-11-23 21:27:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:27:33,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 82 [2023-11-23 21:27:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:33,387 INFO L225 Difference]: With dead ends: 18271 [2023-11-23 21:27:33,387 INFO L226 Difference]: Without dead ends: 12136 [2023-11-23 21:27:33,396 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 21:27:33,397 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 643 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:33,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 262 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:27:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12136 states. [2023-11-23 21:27:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12136 to 12134. [2023-11-23 21:27:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4622105002884696) internal successors, (17741), 12133 states have internal predecessors, (17741), 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 21:27:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17741 transitions. [2023-11-23 21:27:33,759 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17741 transitions. Word has length 82 [2023-11-23 21:27:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:33,759 INFO L495 AbstractCegarLoop]: Abstraction has 12134 states and 17741 transitions. [2023-11-23 21:27:33,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 21:27:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17741 transitions. [2023-11-23 21:27:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:27:33,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:33,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:33,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:27:33,761 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:33,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:33,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1616521928, now seen corresponding path program 1 times [2023-11-23 21:27:33,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:33,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221797649] [2023-11-23 21:27:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:33,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:33,915 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 21:27:33,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:33,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221797649] [2023-11-23 21:27:33,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221797649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:33,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:33,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398805305] [2023-11-23 21:27:33,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:33,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:27:33,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:27:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:27:33,918 INFO L87 Difference]: Start difference. First operand 12134 states and 17741 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 21:27:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:34,218 INFO L93 Difference]: Finished difference Result 24189 states and 35393 transitions. [2023-11-23 21:27:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:27:34,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 83 [2023-11-23 21:27:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:34,247 INFO L225 Difference]: With dead ends: 24189 [2023-11-23 21:27:34,247 INFO L226 Difference]: Without dead ends: 12134 [2023-11-23 21:27:34,260 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 21:27:34,261 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 535 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:34,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 203 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:27:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2023-11-23 21:27:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 12134. [2023-11-23 21:27:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12134 states, 12133 states have (on average 1.4621280804417705) internal successors, (17740), 12133 states have internal predecessors, (17740), 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 21:27:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12134 states to 12134 states and 17740 transitions. [2023-11-23 21:27:34,569 INFO L78 Accepts]: Start accepts. Automaton has 12134 states and 17740 transitions. Word has length 83 [2023-11-23 21:27:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:34,570 INFO L495 AbstractCegarLoop]: Abstraction has 12134 states and 17740 transitions. [2023-11-23 21:27:34,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 21:27:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 12134 states and 17740 transitions. [2023-11-23 21:27:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:27:34,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:34,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:34,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:27:34,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:34,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:34,573 INFO L85 PathProgramCache]: Analyzing trace with hash -779085158, now seen corresponding path program 1 times [2023-11-23 21:27:34,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:34,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997720903] [2023-11-23 21:27:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:34,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:37,399 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 21:27:37,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997720903] [2023-11-23 21:27:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997720903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:37,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:37,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-23 21:27:37,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559510922] [2023-11-23 21:27:37,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:37,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:27:37,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:27:37,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:27:37,402 INFO L87 Difference]: Start difference. First operand 12134 states and 17740 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 21:27:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:39,252 INFO L93 Difference]: Finished difference Result 26022 states and 37890 transitions. [2023-11-23 21:27:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 21:27:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 83 [2023-11-23 21:27:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:39,312 INFO L225 Difference]: With dead ends: 26022 [2023-11-23 21:27:39,313 INFO L226 Difference]: Without dead ends: 26020 [2023-11-23 21:27:39,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:27:39,320 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 1660 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:39,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 1739 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:27:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2023-11-23 21:27:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 19543. [2023-11-23 21:27:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19543 states, 19542 states have (on average 1.4555828472009007) internal successors, (28445), 19542 states have internal predecessors, (28445), 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 21:27:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19543 states to 19543 states and 28445 transitions. [2023-11-23 21:27:39,726 INFO L78 Accepts]: Start accepts. Automaton has 19543 states and 28445 transitions. Word has length 83 [2023-11-23 21:27:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:39,727 INFO L495 AbstractCegarLoop]: Abstraction has 19543 states and 28445 transitions. [2023-11-23 21:27:39,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 21:27:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 19543 states and 28445 transitions. [2023-11-23 21:27:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:27:39,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:39,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:27:39,730 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:39,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:39,730 INFO L85 PathProgramCache]: Analyzing trace with hash -658228550, now seen corresponding path program 1 times [2023-11-23 21:27:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:39,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993359157] [2023-11-23 21:27:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:42,068 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 21:27:42,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:42,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993359157] [2023-11-23 21:27:42,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993359157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:42,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:42,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:27:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46215956] [2023-11-23 21:27:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:42,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:27:42,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:27:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:27:42,072 INFO L87 Difference]: Start difference. First operand 19543 states and 28445 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:44,103 INFO L93 Difference]: Finished difference Result 29756 states and 43231 transitions. [2023-11-23 21:27:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:27:44,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 83 [2023-11-23 21:27:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:44,163 INFO L225 Difference]: With dead ends: 29756 [2023-11-23 21:27:44,163 INFO L226 Difference]: Without dead ends: 29754 [2023-11-23 21:27:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:27:44,171 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1389 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:44,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1389 Valid, 3278 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:27:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29754 states. [2023-11-23 21:27:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29754 to 19570. [2023-11-23 21:27:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19570 states, 19569 states have (on average 1.4553119730185498) internal successors, (28479), 19569 states have internal predecessors, (28479), 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 21:27:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19570 states to 19570 states and 28479 transitions. [2023-11-23 21:27:44,543 INFO L78 Accepts]: Start accepts. Automaton has 19570 states and 28479 transitions. Word has length 83 [2023-11-23 21:27:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:44,543 INFO L495 AbstractCegarLoop]: Abstraction has 19570 states and 28479 transitions. [2023-11-23 21:27:44,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 19570 states and 28479 transitions. [2023-11-23 21:27:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:27:44,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:44,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:27:44,546 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:44,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:44,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1354915078, now seen corresponding path program 1 times [2023-11-23 21:27:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:44,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416026184] [2023-11-23 21:27:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:44,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:46,560 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 21:27:46,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:46,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416026184] [2023-11-23 21:27:46,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416026184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:46,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:46,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:27:46,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694964511] [2023-11-23 21:27:46,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:46,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:27:46,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:27:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:27:46,563 INFO L87 Difference]: Start difference. First operand 19570 states and 28479 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:47,946 INFO L93 Difference]: Finished difference Result 23991 states and 34780 transitions. [2023-11-23 21:27:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:27:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 83 [2023-11-23 21:27:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:47,992 INFO L225 Difference]: With dead ends: 23991 [2023-11-23 21:27:47,993 INFO L226 Difference]: Without dead ends: 23989 [2023-11-23 21:27:48,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:27:48,001 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 1944 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:48,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1944 Valid, 1576 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:27:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23989 states. [2023-11-23 21:27:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23989 to 19593. [2023-11-23 21:27:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19593 states, 19592 states have (on average 1.4549816251531238) internal successors, (28506), 19592 states have internal predecessors, (28506), 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 21:27:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19593 states to 19593 states and 28506 transitions. [2023-11-23 21:27:48,338 INFO L78 Accepts]: Start accepts. Automaton has 19593 states and 28506 transitions. Word has length 83 [2023-11-23 21:27:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:48,339 INFO L495 AbstractCegarLoop]: Abstraction has 19593 states and 28506 transitions. [2023-11-23 21:27:48,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 19593 states and 28506 transitions. [2023-11-23 21:27:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:27:48,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:48,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:48,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:27:48,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:48,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -907144486, now seen corresponding path program 1 times [2023-11-23 21:27:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:48,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289251581] [2023-11-23 21:27:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:48,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:50,362 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 21:27:50,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:50,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289251581] [2023-11-23 21:27:50,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289251581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:50,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:50,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:27:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229867266] [2023-11-23 21:27:50,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:50,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:27:50,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:27:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:27:50,366 INFO L87 Difference]: Start difference. First operand 19593 states and 28506 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:51,786 INFO L93 Difference]: Finished difference Result 26300 states and 38162 transitions. [2023-11-23 21:27:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:27:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 83 [2023-11-23 21:27:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:51,835 INFO L225 Difference]: With dead ends: 26300 [2023-11-23 21:27:51,836 INFO L226 Difference]: Without dead ends: 23994 [2023-11-23 21:27:51,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:27:51,847 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 1164 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:51,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 2144 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:27:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23994 states. [2023-11-23 21:27:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23994 to 21722. [2023-11-23 21:27:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21722 states, 21721 states have (on average 1.4528336632751715) internal successors, (31557), 21721 states have internal predecessors, (31557), 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 21:27:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21722 states to 21722 states and 31557 transitions. [2023-11-23 21:27:52,208 INFO L78 Accepts]: Start accepts. Automaton has 21722 states and 31557 transitions. Word has length 83 [2023-11-23 21:27:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:52,209 INFO L495 AbstractCegarLoop]: Abstraction has 21722 states and 31557 transitions. [2023-11-23 21:27:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 21722 states and 31557 transitions. [2023-11-23 21:27:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:27:52,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:52,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:52,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:27:52,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:52,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1407077766, now seen corresponding path program 1 times [2023-11-23 21:27:52,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:52,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102613950] [2023-11-23 21:27:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:52,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:53,933 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 21:27:53,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:53,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102613950] [2023-11-23 21:27:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102613950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:53,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:53,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:27:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618411429] [2023-11-23 21:27:53,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:53,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:27:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:27:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:27:53,936 INFO L87 Difference]: Start difference. First operand 21722 states and 31557 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:55,718 INFO L93 Difference]: Finished difference Result 38963 states and 56644 transitions. [2023-11-23 21:27:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:27:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 83 [2023-11-23 21:27:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:55,784 INFO L225 Difference]: With dead ends: 38963 [2023-11-23 21:27:55,784 INFO L226 Difference]: Without dead ends: 38961 [2023-11-23 21:27:55,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:27:55,794 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1508 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:55,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 3096 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:27:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38961 states. [2023-11-23 21:27:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38961 to 23577. [2023-11-23 21:27:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23577 states, 23576 states have (on average 1.4532151340346116) internal successors, (34261), 23576 states have internal predecessors, (34261), 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 21:27:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23577 states to 23577 states and 34261 transitions. [2023-11-23 21:27:56,270 INFO L78 Accepts]: Start accepts. Automaton has 23577 states and 34261 transitions. Word has length 83 [2023-11-23 21:27:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:56,270 INFO L495 AbstractCegarLoop]: Abstraction has 23577 states and 34261 transitions. [2023-11-23 21:27:56,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 21:27:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 23577 states and 34261 transitions. [2023-11-23 21:27:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 21:27:56,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:56,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:56,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:27:56,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:56,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash 746454210, now seen corresponding path program 1 times [2023-11-23 21:27:56,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:56,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396834062] [2023-11-23 21:27:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:56,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:57,937 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 21:27:57,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:57,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396834062] [2023-11-23 21:27:57,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396834062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:57,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:57,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 21:27:57,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598917182] [2023-11-23 21:27:57,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:57,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:27:57,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:27:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:27:57,940 INFO L87 Difference]: Start difference. First operand 23577 states and 34261 transitions. Second operand has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 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 21:27:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:59,274 INFO L93 Difference]: Finished difference Result 45749 states and 66633 transitions. [2023-11-23 21:27:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:27:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 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 84 [2023-11-23 21:27:59,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:59,421 INFO L225 Difference]: With dead ends: 45749 [2023-11-23 21:27:59,422 INFO L226 Difference]: Without dead ends: 45747 [2023-11-23 21:27:59,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:27:59,430 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1716 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:59,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 3048 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:27:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45747 states. [2023-11-23 21:27:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45747 to 26277. [2023-11-23 21:27:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 26276 states have (on average 1.4544831785659917) internal successors, (38218), 26276 states have internal predecessors, (38218), 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 21:28:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 38218 transitions. [2023-11-23 21:28:00,019 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 38218 transitions. Word has length 84 [2023-11-23 21:28:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:00,019 INFO L495 AbstractCegarLoop]: Abstraction has 26277 states and 38218 transitions. [2023-11-23 21:28:00,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.2) internal successors, (84), 20 states have internal predecessors, (84), 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 21:28:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 38218 transitions. [2023-11-23 21:28:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 21:28:00,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:00,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 21:28:00,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:00,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash -213407002, now seen corresponding path program 1 times [2023-11-23 21:28:00,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:00,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119879511] [2023-11-23 21:28:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:00,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:01,945 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 21:28:01,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119879511] [2023-11-23 21:28:01,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119879511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:01,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:01,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-23 21:28:01,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530959853] [2023-11-23 21:28:01,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:01,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:28:01,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:01,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:28:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:28:01,947 INFO L87 Difference]: Start difference. First operand 26277 states and 38218 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 21:28:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:04,427 INFO L93 Difference]: Finished difference Result 41954 states and 60873 transitions. [2023-11-23 21:28:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 21:28:04,428 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 85 [2023-11-23 21:28:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:04,466 INFO L225 Difference]: With dead ends: 41954 [2023-11-23 21:28:04,466 INFO L226 Difference]: Without dead ends: 41952 [2023-11-23 21:28:04,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:28:04,476 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1224 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:04,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 3723 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 21:28:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41952 states. [2023-11-23 21:28:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41952 to 26283. [2023-11-23 21:28:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26283 states, 26282 states have (on average 1.4544174720340917) internal successors, (38225), 26282 states have internal predecessors, (38225), 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 21:28:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26283 states to 26283 states and 38225 transitions. [2023-11-23 21:28:05,006 INFO L78 Accepts]: Start accepts. Automaton has 26283 states and 38225 transitions. Word has length 85 [2023-11-23 21:28:05,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:05,007 INFO L495 AbstractCegarLoop]: Abstraction has 26283 states and 38225 transitions. [2023-11-23 21:28:05,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 21:28:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 26283 states and 38225 transitions. [2023-11-23 21:28:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 21:28:05,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:05,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:05,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:28:05,010 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:05,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:05,011 INFO L85 PathProgramCache]: Analyzing trace with hash -910093530, now seen corresponding path program 1 times [2023-11-23 21:28:05,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:05,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630974016] [2023-11-23 21:28:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:05,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:06,658 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 21:28:06,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:06,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630974016] [2023-11-23 21:28:06,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630974016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:06,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:06,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-11-23 21:28:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678560972] [2023-11-23 21:28:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:06,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 21:28:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 21:28:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:28:06,661 INFO L87 Difference]: Start difference. First operand 26283 states and 38225 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 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)