./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --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 dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:14:05,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:14:05,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:14:05,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:14:05,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:14:05,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:14:05,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:14:05,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:14:05,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:14:05,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:14:05,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:14:05,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:14:05,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:14:05,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:14:05,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:14:05,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:14:05,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:14:05,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:14:05,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:14:05,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:14:05,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:14:05,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:14:05,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:14:05,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:14:05,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:14:05,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:14:05,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:14:05,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:14:05,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:14:05,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:14:05,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:14:05,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:14:05,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:14:05,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:14:05,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:14:05,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:14:05,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:14:05,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:14:05,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:14:05,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:14:05,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:14:05,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:14:05,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:14:05,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:14:05,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:14:05,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:14:05,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:14:05,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:14:05,431 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:14:05,431 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:14:05,431 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:14:05,431 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:14:05,433 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:14:05,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:14:05,433 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:14:05,433 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:14:05,434 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:14:05,434 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:14:05,434 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:14:05,434 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:14:05,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:14:05,435 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:14:05,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:14:05,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:14:05,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:14:05,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:14:05,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:14:05,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:14:05,438 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:14:05,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:14:05,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:14:05,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:14:05,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:14:05,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:14:05,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:14:05,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:14:05,441 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:14:05,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:14:05,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:14:05,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:14:05,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:14:05,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:14:05,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:14:05,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 [2022-11-19 08:14:05,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:14:05,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:14:05,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:14:05,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:14:05,784 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:14:05,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2022-11-19 08:14:05,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/data/ac3955b45/5ac7be4796ff46cf8d3e90c2ec4f014a/FLAG539698d27 [2022-11-19 08:14:06,619 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:14:06,620 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2022-11-19 08:14:06,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/data/ac3955b45/5ac7be4796ff46cf8d3e90c2ec4f014a/FLAG539698d27 [2022-11-19 08:14:06,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/data/ac3955b45/5ac7be4796ff46cf8d3e90c2ec4f014a [2022-11-19 08:14:06,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:14:06,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:14:06,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:14:06,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:14:06,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:14:06,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:14:06" (1/1) ... [2022-11-19 08:14:06,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afa0aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:06, skipping insertion in model container [2022-11-19 08:14:06,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:14:06" (1/1) ... [2022-11-19 08:14:06,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:14:06,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:14:07,589 WARN L234 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_68cd145a-07e9-4276-bca1-00b8259574e6/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2022-11-19 08:14:07,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:14:07,632 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:14:07,928 WARN L234 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_68cd145a-07e9-4276-bca1-00b8259574e6/sv-benchmarks/c/eca-rers2012/Problem03_label19.c[59475,59488] [2022-11-19 08:14:07,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:14:07,966 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:14:07,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07 WrapperNode [2022-11-19 08:14:07,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:14:07,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:14:07,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:14:07,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:14:07,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,155 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-19 08:14:08,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:14:08,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:14:08,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:14:08,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:14:08,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,265 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:14:08,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:14:08,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:14:08,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:14:08,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (1/1) ... [2022-11-19 08:14:08,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:14:08,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:08,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:14:08,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:14:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:14:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:14:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:14:08,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:14:08,476 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:14:08,478 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:14:10,634 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:14:11,089 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:14:11,089 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:14:11,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:14:11 BoogieIcfgContainer [2022-11-19 08:14:11,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:14:11,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:14:11,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:14:11,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:14:11,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:14:06" (1/3) ... [2022-11-19 08:14:11,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5e7c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:14:11, skipping insertion in model container [2022-11-19 08:14:11,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:14:07" (2/3) ... [2022-11-19 08:14:11,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5e7c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:14:11, skipping insertion in model container [2022-11-19 08:14:11,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:14:11" (3/3) ... [2022-11-19 08:14:11,105 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label19.c [2022-11-19 08:14:11,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:14:11,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:14:11,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:14:11,233 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=LoopsAndPotentialCycles, 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;@55b3df7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:14:11,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:14:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 08:14:11,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:11,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:11,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1724855493, now seen corresponding path program 1 times [2022-11-19 08:14:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376284708] [2022-11-19 08:14:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:12,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:12,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376284708] [2022-11-19 08:14:12,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376284708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:12,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:12,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:12,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827480287] [2022-11-19 08:14:12,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:12,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:12,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:12,335 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 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 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:13,520 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-19 08:14:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:13,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-11-19 08:14:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:13,539 INFO L225 Difference]: With dead ends: 440 [2022-11-19 08:14:13,539 INFO L226 Difference]: Without dead ends: 289 [2022-11-19 08:14:13,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:13,547 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:13,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:14:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-19 08:14:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-19 08:14:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2022-11-19 08:14:13,615 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2022-11-19 08:14:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:13,617 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2022-11-19 08:14:13,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2022-11-19 08:14:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-19 08:14:13,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:13,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:13,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:14:13,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:13,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1817681626, now seen corresponding path program 1 times [2022-11-19 08:14:13,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:13,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864333261] [2022-11-19 08:14:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:13,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:13,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:13,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864333261] [2022-11-19 08:14:13,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864333261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:13,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:13,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224653961] [2022-11-19 08:14:13,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:13,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:13,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:13,908 INFO L87 Difference]: Start difference. First operand 289 states and 515 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:14,943 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2022-11-19 08:14:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:14,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2022-11-19 08:14:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:14,964 INFO L225 Difference]: With dead ends: 863 [2022-11-19 08:14:14,964 INFO L226 Difference]: Without dead ends: 575 [2022-11-19 08:14:14,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:14,968 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:14,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:14:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-19 08:14:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-19 08:14:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7421602787456445) internal successors, (1000), 574 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1000 transitions. [2022-11-19 08:14:15,039 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1000 transitions. Word has length 151 [2022-11-19 08:14:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:15,039 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1000 transitions. [2022-11-19 08:14:15,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1000 transitions. [2022-11-19 08:14:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-19 08:14:15,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:15,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:15,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:14:15,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash 733021885, now seen corresponding path program 1 times [2022-11-19 08:14:15,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:15,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720609823] [2022-11-19 08:14:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:15,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:14:16,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720609823] [2022-11-19 08:14:16,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720609823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:16,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:16,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:14:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741917553] [2022-11-19 08:14:16,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:14:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:14:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:14:16,150 INFO L87 Difference]: Start difference. First operand 575 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:17,356 INFO L93 Difference]: Finished difference Result 1290 states and 2262 transitions. [2022-11-19 08:14:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:14:17,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 158 [2022-11-19 08:14:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:17,366 INFO L225 Difference]: With dead ends: 1290 [2022-11-19 08:14:17,366 INFO L226 Difference]: Without dead ends: 575 [2022-11-19 08:14:17,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:14:17,375 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 220 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:17,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 11 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:14:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-19 08:14:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-19 08:14:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.519163763066202) internal successors, (872), 574 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 872 transitions. [2022-11-19 08:14:17,418 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 872 transitions. Word has length 158 [2022-11-19 08:14:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:17,418 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 872 transitions. [2022-11-19 08:14:17,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 872 transitions. [2022-11-19 08:14:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-19 08:14:17,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:17,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:17,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:14:17,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2058056106, now seen corresponding path program 1 times [2022-11-19 08:14:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:17,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512365947] [2022-11-19 08:14:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:17,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:17,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:17,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512365947] [2022-11-19 08:14:17,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512365947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:17,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:17,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094293633] [2022-11-19 08:14:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:17,789 INFO L87 Difference]: Start difference. First operand 575 states and 872 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:18,530 INFO L93 Difference]: Finished difference Result 1723 states and 2614 transitions. [2022-11-19 08:14:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2022-11-19 08:14:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:18,537 INFO L225 Difference]: With dead ends: 1723 [2022-11-19 08:14:18,537 INFO L226 Difference]: Without dead ends: 1149 [2022-11-19 08:14:18,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:18,546 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:18,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 12 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:14:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-19 08:14:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-11-19 08:14:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.506108202443281) internal successors, (1726), 1146 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1726 transitions. [2022-11-19 08:14:18,592 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1726 transitions. Word has length 166 [2022-11-19 08:14:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:18,594 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1726 transitions. [2022-11-19 08:14:18,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1726 transitions. [2022-11-19 08:14:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-19 08:14:18,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:18,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:18,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:14:18,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1145017990, now seen corresponding path program 1 times [2022-11-19 08:14:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:18,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281615116] [2022-11-19 08:14:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:18,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281615116] [2022-11-19 08:14:18,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281615116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:18,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:18,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:18,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777243245] [2022-11-19 08:14:18,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:18,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:18,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:18,869 INFO L87 Difference]: Start difference. First operand 1147 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:19,619 INFO L93 Difference]: Finished difference Result 3437 states and 5175 transitions. [2022-11-19 08:14:19,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2022-11-19 08:14:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:19,627 INFO L225 Difference]: With dead ends: 3437 [2022-11-19 08:14:19,628 INFO L226 Difference]: Without dead ends: 2291 [2022-11-19 08:14:19,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:19,631 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 129 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:19,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 71 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:14:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-11-19 08:14:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-11-19 08:14:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4838427947598254) internal successors, (3398), 2290 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3398 transitions. [2022-11-19 08:14:19,695 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3398 transitions. Word has length 169 [2022-11-19 08:14:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:19,696 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3398 transitions. [2022-11-19 08:14:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3398 transitions. [2022-11-19 08:14:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-19 08:14:19,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:19,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:14:19,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1836469087, now seen corresponding path program 1 times [2022-11-19 08:14:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:19,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651143876] [2022-11-19 08:14:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:19,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:20,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651143876] [2022-11-19 08:14:20,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651143876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:20,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:20,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701586496] [2022-11-19 08:14:20,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:20,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:20,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:20,293 INFO L87 Difference]: Start difference. First operand 2291 states and 3398 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:21,166 INFO L93 Difference]: Finished difference Result 6869 states and 10191 transitions. [2022-11-19 08:14:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2022-11-19 08:14:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:21,185 INFO L225 Difference]: With dead ends: 6869 [2022-11-19 08:14:21,186 INFO L226 Difference]: Without dead ends: 4579 [2022-11-19 08:14:21,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:21,191 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:21,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 45 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:14:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-11-19 08:14:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4579. [2022-11-19 08:14:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 1.452599388379205) internal successors, (6650), 4578 states have internal predecessors, (6650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6650 transitions. [2022-11-19 08:14:21,350 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6650 transitions. Word has length 171 [2022-11-19 08:14:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:21,351 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 6650 transitions. [2022-11-19 08:14:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6650 transitions. [2022-11-19 08:14:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-19 08:14:21,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:21,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:21,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:14:21,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash 354466876, now seen corresponding path program 1 times [2022-11-19 08:14:21,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:21,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921476744] [2022-11-19 08:14:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:21,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:14:21,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921476744] [2022-11-19 08:14:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921476744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:21,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:21,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758220984] [2022-11-19 08:14:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:21,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:21,700 INFO L87 Difference]: Start difference. First operand 4579 states and 6650 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:22,581 INFO L93 Difference]: Finished difference Result 11445 states and 16575 transitions. [2022-11-19 08:14:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 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 176 [2022-11-19 08:14:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:22,607 INFO L225 Difference]: With dead ends: 11445 [2022-11-19 08:14:22,608 INFO L226 Difference]: Without dead ends: 6867 [2022-11-19 08:14:22,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:22,616 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:22,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 19 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:14:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2022-11-19 08:14:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 6867. [2022-11-19 08:14:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6867 states, 6866 states have (on average 1.431692397320128) internal successors, (9830), 6866 states have internal predecessors, (9830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6867 states to 6867 states and 9830 transitions. [2022-11-19 08:14:22,862 INFO L78 Accepts]: Start accepts. Automaton has 6867 states and 9830 transitions. Word has length 176 [2022-11-19 08:14:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:22,863 INFO L495 AbstractCegarLoop]: Abstraction has 6867 states and 9830 transitions. [2022-11-19 08:14:22,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6867 states and 9830 transitions. [2022-11-19 08:14:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-19 08:14:22,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:22,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:22,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:14:22,880 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1881239248, now seen corresponding path program 1 times [2022-11-19 08:14:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:22,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096671582] [2022-11-19 08:14:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:14:23,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096671582] [2022-11-19 08:14:23,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096671582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:23,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:23,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:23,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498224443] [2022-11-19 08:14:23,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:23,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:23,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:23,336 INFO L87 Difference]: Start difference. First operand 6867 states and 9830 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:24,251 INFO L93 Difference]: Finished difference Result 19741 states and 28273 transitions. [2022-11-19 08:14:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:24,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 177 [2022-11-19 08:14:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:24,305 INFO L225 Difference]: With dead ends: 19741 [2022-11-19 08:14:24,305 INFO L226 Difference]: Without dead ends: 12875 [2022-11-19 08:14:24,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:24,316 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 128 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:24,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 60 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:14:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12875 states. [2022-11-19 08:14:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12875 to 12873. [2022-11-19 08:14:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 12872 states have (on average 1.4251087632069608) internal successors, (18344), 12872 states have internal predecessors, (18344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 18344 transitions. [2022-11-19 08:14:24,665 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 18344 transitions. Word has length 177 [2022-11-19 08:14:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:24,668 INFO L495 AbstractCegarLoop]: Abstraction has 12873 states and 18344 transitions. [2022-11-19 08:14:24,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 18344 transitions. [2022-11-19 08:14:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-19 08:14:24,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:24,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:14:24,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash -813754954, now seen corresponding path program 1 times [2022-11-19 08:14:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:24,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551355073] [2022-11-19 08:14:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:25,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:25,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551355073] [2022-11-19 08:14:25,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551355073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:25,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:25,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:14:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805269992] [2022-11-19 08:14:25,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:25,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:25,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:25,176 INFO L87 Difference]: Start difference. First operand 12873 states and 18344 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:26,157 INFO L93 Difference]: Finished difference Result 28891 states and 41285 transitions. [2022-11-19 08:14:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 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 178 [2022-11-19 08:14:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:26,199 INFO L225 Difference]: With dead ends: 28891 [2022-11-19 08:14:26,200 INFO L226 Difference]: Without dead ends: 16019 [2022-11-19 08:14:26,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:26,216 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:26,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 212 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:14:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2022-11-19 08:14:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 16019. [2022-11-19 08:14:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16019 states, 16018 states have (on average 1.3781370957672618) internal successors, (22075), 16018 states have internal predecessors, (22075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16019 states to 16019 states and 22075 transitions. [2022-11-19 08:14:26,645 INFO L78 Accepts]: Start accepts. Automaton has 16019 states and 22075 transitions. Word has length 178 [2022-11-19 08:14:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:26,645 INFO L495 AbstractCegarLoop]: Abstraction has 16019 states and 22075 transitions. [2022-11-19 08:14:26,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 16019 states and 22075 transitions. [2022-11-19 08:14:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-19 08:14:26,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:26,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:26,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:14:26,663 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:26,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1381040491, now seen corresponding path program 1 times [2022-11-19 08:14:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:26,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431981367] [2022-11-19 08:14:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:26,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:14:27,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:27,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431981367] [2022-11-19 08:14:27,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431981367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:27,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:27,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:27,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798738696] [2022-11-19 08:14:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:27,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:27,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:27,141 INFO L87 Difference]: Start difference. First operand 16019 states and 22075 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:28,158 INFO L93 Difference]: Finished difference Result 36756 states and 50580 transitions. [2022-11-19 08:14:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 188 [2022-11-19 08:14:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:28,206 INFO L225 Difference]: With dead ends: 36756 [2022-11-19 08:14:28,207 INFO L226 Difference]: Without dead ends: 20738 [2022-11-19 08:14:28,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:28,221 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:28,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 60 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:14:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20738 states. [2022-11-19 08:14:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20738 to 20738. [2022-11-19 08:14:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20738 states, 20737 states have (on average 1.3507739788783335) internal successors, (28011), 20737 states have internal predecessors, (28011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20738 states to 20738 states and 28011 transitions. [2022-11-19 08:14:28,620 INFO L78 Accepts]: Start accepts. Automaton has 20738 states and 28011 transitions. Word has length 188 [2022-11-19 08:14:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:28,620 INFO L495 AbstractCegarLoop]: Abstraction has 20738 states and 28011 transitions. [2022-11-19 08:14:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20738 states and 28011 transitions. [2022-11-19 08:14:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-19 08:14:28,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:28,647 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:28,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:14:28,647 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash -270738584, now seen corresponding path program 1 times [2022-11-19 08:14:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:28,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892938343] [2022-11-19 08:14:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:14:29,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892938343] [2022-11-19 08:14:29,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892938343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469499636] [2022-11-19 08:14:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:29,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:29,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:29,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:29,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:14:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:29,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:14:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:14:29,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:29,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469499636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:29,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:14:29,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-19 08:14:29,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643382117] [2022-11-19 08:14:29,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:29,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:29,793 INFO L87 Difference]: Start difference. First operand 20738 states and 28011 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:31,004 INFO L93 Difference]: Finished difference Result 46909 states and 63897 transitions. [2022-11-19 08:14:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:31,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 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 195 [2022-11-19 08:14:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:31,077 INFO L225 Difference]: With dead ends: 46909 [2022-11-19 08:14:31,077 INFO L226 Difference]: Without dead ends: 26315 [2022-11-19 08:14:31,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:31,097 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 136 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:31,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 65 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:14:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26315 states. [2022-11-19 08:14:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26315 to 26315. [2022-11-19 08:14:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26315 states, 26314 states have (on average 1.2193889184464544) internal successors, (32087), 26314 states have internal predecessors, (32087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26315 states to 26315 states and 32087 transitions. [2022-11-19 08:14:31,754 INFO L78 Accepts]: Start accepts. Automaton has 26315 states and 32087 transitions. Word has length 195 [2022-11-19 08:14:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:31,755 INFO L495 AbstractCegarLoop]: Abstraction has 26315 states and 32087 transitions. [2022-11-19 08:14:31,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 26315 states and 32087 transitions. [2022-11-19 08:14:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-19 08:14:31,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:31,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:31,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:14:31,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:14:31,997 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1583364056, now seen corresponding path program 1 times [2022-11-19 08:14:31,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:31,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115394824] [2022-11-19 08:14:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:31,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:14:32,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115394824] [2022-11-19 08:14:32,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115394824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:32,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:32,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590098869] [2022-11-19 08:14:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:32,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:32,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:32,741 INFO L87 Difference]: Start difference. First operand 26315 states and 32087 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:33,731 INFO L93 Difference]: Finished difference Result 55920 states and 67922 transitions. [2022-11-19 08:14:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 205 [2022-11-19 08:14:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:33,792 INFO L225 Difference]: With dead ends: 55920 [2022-11-19 08:14:33,792 INFO L226 Difference]: Without dead ends: 30035 [2022-11-19 08:14:33,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:33,811 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 120 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:33,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 75 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:14:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30035 states. [2022-11-19 08:14:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30035 to 30033. [2022-11-19 08:14:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30033 states, 30032 states have (on average 1.2074786893979754) internal successors, (36263), 30032 states have internal predecessors, (36263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30033 states to 30033 states and 36263 transitions. [2022-11-19 08:14:34,324 INFO L78 Accepts]: Start accepts. Automaton has 30033 states and 36263 transitions. Word has length 205 [2022-11-19 08:14:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:34,325 INFO L495 AbstractCegarLoop]: Abstraction has 30033 states and 36263 transitions. [2022-11-19 08:14:34,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 30033 states and 36263 transitions. [2022-11-19 08:14:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-19 08:14:34,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:34,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:14:34,361 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1791339015, now seen corresponding path program 1 times [2022-11-19 08:14:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:34,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72209198] [2022-11-19 08:14:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:34,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:35,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:35,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72209198] [2022-11-19 08:14:35,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72209198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:35,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:35,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:35,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215192659] [2022-11-19 08:14:35,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:35,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:35,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:35,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:35,104 INFO L87 Difference]: Start difference. First operand 30033 states and 36263 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:35,958 INFO L93 Difference]: Finished difference Result 58778 states and 71108 transitions. [2022-11-19 08:14:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2022-11-19 08:14:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:36,015 INFO L225 Difference]: With dead ends: 58778 [2022-11-19 08:14:36,015 INFO L226 Difference]: Without dead ends: 30176 [2022-11-19 08:14:36,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:36,035 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:36,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:14:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30176 states. [2022-11-19 08:14:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30176 to 30176. [2022-11-19 08:14:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30176 states, 30175 states have (on average 1.2066942833471417) internal successors, (36412), 30175 states have internal predecessors, (36412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30176 states to 30176 states and 36412 transitions. [2022-11-19 08:14:36,631 INFO L78 Accepts]: Start accepts. Automaton has 30176 states and 36412 transitions. Word has length 217 [2022-11-19 08:14:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:36,632 INFO L495 AbstractCegarLoop]: Abstraction has 30176 states and 36412 transitions. [2022-11-19 08:14:36,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 30176 states and 36412 transitions. [2022-11-19 08:14:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-19 08:14:36,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:36,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:14:36,652 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2004384316, now seen corresponding path program 1 times [2022-11-19 08:14:36,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:36,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382448908] [2022-11-19 08:14:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:36,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:37,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:37,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382448908] [2022-11-19 08:14:37,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382448908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:37,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813805919] [2022-11-19 08:14:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:37,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:37,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:14:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:14:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:14:37,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:37,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813805919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:37,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:14:37,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 08:14:37,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212498301] [2022-11-19 08:14:37,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:37,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:37,779 INFO L87 Difference]: Start difference. First operand 30176 states and 36412 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:38,954 INFO L93 Difference]: Finished difference Result 57634 states and 70236 transitions. [2022-11-19 08:14:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 243 [2022-11-19 08:14:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:39,022 INFO L225 Difference]: With dead ends: 57634 [2022-11-19 08:14:39,022 INFO L226 Difference]: Without dead ends: 31749 [2022-11-19 08:14:39,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:39,044 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:39,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 175 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:14:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31749 states. [2022-11-19 08:14:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31749 to 31749. [2022-11-19 08:14:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31749 states, 31748 states have (on average 1.204233337533073) internal successors, (38232), 31748 states have internal predecessors, (38232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31749 states to 31749 states and 38232 transitions. [2022-11-19 08:14:39,740 INFO L78 Accepts]: Start accepts. Automaton has 31749 states and 38232 transitions. Word has length 243 [2022-11-19 08:14:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:39,740 INFO L495 AbstractCegarLoop]: Abstraction has 31749 states and 38232 transitions. [2022-11-19 08:14:39,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 31749 states and 38232 transitions. [2022-11-19 08:14:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-19 08:14:39,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:39,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:39,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:14:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:39,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash -350694319, now seen corresponding path program 1 times [2022-11-19 08:14:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644471079] [2022-11-19 08:14:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 08:14:40,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:40,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644471079] [2022-11-19 08:14:40,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644471079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:40,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684564034] [2022-11-19 08:14:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:40,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:40,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:40,552 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:40,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:14:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:14:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 08:14:41,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:41,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684564034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:41,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:14:41,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 08:14:41,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211676826] [2022-11-19 08:14:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:41,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:41,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:41,259 INFO L87 Difference]: Start difference. First operand 31749 states and 38232 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:42,272 INFO L93 Difference]: Finished difference Result 67215 states and 81609 transitions. [2022-11-19 08:14:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 252 [2022-11-19 08:14:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:42,321 INFO L225 Difference]: With dead ends: 67215 [2022-11-19 08:14:42,321 INFO L226 Difference]: Without dead ends: 39757 [2022-11-19 08:14:42,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:42,342 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:42,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 205 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:14:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39757 states. [2022-11-19 08:14:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39757 to 39471. [2022-11-19 08:14:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39471 states, 39470 states have (on average 1.1710412971877375) internal successors, (46221), 39470 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39471 states to 39471 states and 46221 transitions. [2022-11-19 08:14:42,981 INFO L78 Accepts]: Start accepts. Automaton has 39471 states and 46221 transitions. Word has length 252 [2022-11-19 08:14:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:42,982 INFO L495 AbstractCegarLoop]: Abstraction has 39471 states and 46221 transitions. [2022-11-19 08:14:42,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 39471 states and 46221 transitions. [2022-11-19 08:14:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-19 08:14:43,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:43,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:43,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:43,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:14:43,218 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:43,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1076737737, now seen corresponding path program 1 times [2022-11-19 08:14:43,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:43,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025179498] [2022-11-19 08:14:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:43,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:14:43,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025179498] [2022-11-19 08:14:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025179498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:43,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993201794] [2022-11-19 08:14:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:43,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:43,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:43,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:14:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:14:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:14:44,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:44,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993201794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:44,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:14:44,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 08:14:44,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374419707] [2022-11-19 08:14:44,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:44,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:44,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:44,398 INFO L87 Difference]: Start difference. First operand 39471 states and 46221 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:45,454 INFO L93 Difference]: Finished difference Result 83660 states and 98237 transitions. [2022-11-19 08:14:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 262 [2022-11-19 08:14:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:45,502 INFO L225 Difference]: With dead ends: 83660 [2022-11-19 08:14:45,502 INFO L226 Difference]: Without dead ends: 48623 [2022-11-19 08:14:45,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:45,528 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:45,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:14:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48623 states. [2022-11-19 08:14:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48623 to 48623. [2022-11-19 08:14:46,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48623 states, 48622 states have (on average 1.16996421373041) internal successors, (56886), 48622 states have internal predecessors, (56886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48623 states to 48623 states and 56886 transitions. [2022-11-19 08:14:46,324 INFO L78 Accepts]: Start accepts. Automaton has 48623 states and 56886 transitions. Word has length 262 [2022-11-19 08:14:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:46,325 INFO L495 AbstractCegarLoop]: Abstraction has 48623 states and 56886 transitions. [2022-11-19 08:14:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 48623 states and 56886 transitions. [2022-11-19 08:14:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-19 08:14:46,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:46,353 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:46,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:46,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:14:46,560 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -324618326, now seen corresponding path program 1 times [2022-11-19 08:14:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:46,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487857572] [2022-11-19 08:14:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:46,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 130 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:14:47,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:47,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487857572] [2022-11-19 08:14:47,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487857572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:47,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152422313] [2022-11-19 08:14:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:47,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:47,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:47,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:47,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:14:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:14:47,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:14:47,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:47,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152422313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:47,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:14:47,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 08:14:47,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276266171] [2022-11-19 08:14:47,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:47,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:14:47,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:47,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:14:47,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:14:47,754 INFO L87 Difference]: Start difference. First operand 48623 states and 56886 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:49,364 INFO L93 Difference]: Finished difference Result 133428 states and 156447 transitions. [2022-11-19 08:14:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:14:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 271 [2022-11-19 08:14:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:49,453 INFO L225 Difference]: With dead ends: 133428 [2022-11-19 08:14:49,453 INFO L226 Difference]: Without dead ends: 85950 [2022-11-19 08:14:49,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:14:49,481 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 323 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:49,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 183 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:14:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85950 states. [2022-11-19 08:14:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85950 to 82657. [2022-11-19 08:14:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82657 states, 82656 states have (on average 1.1671506000774294) internal successors, (96472), 82656 states have internal predecessors, (96472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82657 states to 82657 states and 96472 transitions. [2022-11-19 08:14:51,058 INFO L78 Accepts]: Start accepts. Automaton has 82657 states and 96472 transitions. Word has length 271 [2022-11-19 08:14:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:51,059 INFO L495 AbstractCegarLoop]: Abstraction has 82657 states and 96472 transitions. [2022-11-19 08:14:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 82657 states and 96472 transitions. [2022-11-19 08:14:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-11-19 08:14:51,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:51,127 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:51,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:51,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:14:51,335 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:51,336 INFO L85 PathProgramCache]: Analyzing trace with hash 189256037, now seen corresponding path program 1 times [2022-11-19 08:14:51,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058078863] [2022-11-19 08:14:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 144 proven. 6 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-19 08:14:51,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058078863] [2022-11-19 08:14:51,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058078863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877373569] [2022-11-19 08:14:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:51,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:51,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:51,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:14:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:52,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:14:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 08:14:52,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:52,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877373569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:52,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:14:52,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 08:14:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031231835] [2022-11-19 08:14:52,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:52,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:52,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:52,254 INFO L87 Difference]: Start difference. First operand 82657 states and 96472 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:53,698 INFO L93 Difference]: Finished difference Result 159021 states and 185894 transitions. [2022-11-19 08:14:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 280 [2022-11-19 08:14:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:53,790 INFO L225 Difference]: With dead ends: 159021 [2022-11-19 08:14:53,790 INFO L226 Difference]: Without dead ends: 77795 [2022-11-19 08:14:53,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:53,817 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 124 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:53,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 205 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:14:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77795 states. [2022-11-19 08:14:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77795 to 70359. [2022-11-19 08:14:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70359 states, 70358 states have (on average 1.1391170868984337) internal successors, (80146), 70358 states have internal predecessors, (80146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70359 states to 70359 states and 80146 transitions. [2022-11-19 08:14:55,400 INFO L78 Accepts]: Start accepts. Automaton has 70359 states and 80146 transitions. Word has length 280 [2022-11-19 08:14:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:55,401 INFO L495 AbstractCegarLoop]: Abstraction has 70359 states and 80146 transitions. [2022-11-19 08:14:55,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 70359 states and 80146 transitions. [2022-11-19 08:14:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-11-19 08:14:55,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:55,425 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:55,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 08:14:55,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:14:55,627 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:14:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 400657746, now seen corresponding path program 1 times [2022-11-19 08:14:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:14:55,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422862800] [2022-11-19 08:14:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:55,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:14:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-19 08:14:56,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422862800] [2022-11-19 08:14:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422862800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260995499] [2022-11-19 08:14:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:56,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:56,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:56,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:14:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:14:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-19 08:14:56,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:56,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260995499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:56,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:14:56,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 08:14:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911312349] [2022-11-19 08:14:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:14:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:14:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:14:56,588 INFO L87 Difference]: Start difference. First operand 70359 states and 80146 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:58,294 INFO L93 Difference]: Finished difference Result 171607 states and 196145 transitions. [2022-11-19 08:14:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:14:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 282 [2022-11-19 08:14:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:58,414 INFO L225 Difference]: With dead ends: 171607 [2022-11-19 08:14:58,414 INFO L226 Difference]: Without dead ends: 101535 [2022-11-19 08:14:58,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:14:58,446 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 337 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:58,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 252 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:14:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101535 states. [2022-11-19 08:15:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101535 to 101533. [2022-11-19 08:15:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101533 states, 101532 states have (on average 1.1405172753417643) internal successors, (115799), 101532 states have internal predecessors, (115799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101533 states to 101533 states and 115799 transitions. [2022-11-19 08:15:00,650 INFO L78 Accepts]: Start accepts. Automaton has 101533 states and 115799 transitions. Word has length 282 [2022-11-19 08:15:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:00,650 INFO L495 AbstractCegarLoop]: Abstraction has 101533 states and 115799 transitions. [2022-11-19 08:15:00,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 101533 states and 115799 transitions. [2022-11-19 08:15:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-11-19 08:15:00,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:00,696 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:00,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 08:15:00,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:00,904 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:00,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash 272861602, now seen corresponding path program 1 times [2022-11-19 08:15:00,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:00,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588762920] [2022-11-19 08:15:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:00,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:15:01,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:01,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588762920] [2022-11-19 08:15:01,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588762920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:01,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500440528] [2022-11-19 08:15:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:01,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:01,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:01,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:01,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:15:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:01,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:15:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:15:02,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:02,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500440528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:02,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:02,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-19 08:15:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952284602] [2022-11-19 08:15:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:15:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:15:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:02,129 INFO L87 Difference]: Start difference. First operand 101533 states and 115799 transitions. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:04,156 INFO L93 Difference]: Finished difference Result 207927 states and 237048 transitions. [2022-11-19 08:15:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:15:04,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 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 299 [2022-11-19 08:15:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:04,333 INFO L225 Difference]: With dead ends: 207927 [2022-11-19 08:15:04,333 INFO L226 Difference]: Without dead ends: 107110 [2022-11-19 08:15:04,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:04,375 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 273 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:04,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 177 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:15:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107110 states. [2022-11-19 08:15:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107110 to 107110. [2022-11-19 08:15:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107110 states, 107109 states have (on average 1.133266112091421) internal successors, (121383), 107109 states have internal predecessors, (121383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107110 states to 107110 states and 121383 transitions. [2022-11-19 08:15:06,418 INFO L78 Accepts]: Start accepts. Automaton has 107110 states and 121383 transitions. Word has length 299 [2022-11-19 08:15:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:06,418 INFO L495 AbstractCegarLoop]: Abstraction has 107110 states and 121383 transitions. [2022-11-19 08:15:06,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 107110 states and 121383 transitions. [2022-11-19 08:15:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-19 08:15:06,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:06,447 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:06,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:06,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:06,649 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:06,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1049746341, now seen corresponding path program 1 times [2022-11-19 08:15:06,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:06,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910215249] [2022-11-19 08:15:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:06,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 221 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:15:07,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910215249] [2022-11-19 08:15:07,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910215249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578107591] [2022-11-19 08:15:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:07,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:07,579 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:07,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:15:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:15:07,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:15:07,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:07,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578107591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:07,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:07,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-19 08:15:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95078680] [2022-11-19 08:15:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:07,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:07,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:07,941 INFO L87 Difference]: Start difference. First operand 107110 states and 121383 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:09,719 INFO L93 Difference]: Finished difference Result 215935 states and 244790 transitions. [2022-11-19 08:15:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:09,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 318 [2022-11-19 08:15:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:09,861 INFO L225 Difference]: With dead ends: 215935 [2022-11-19 08:15:09,862 INFO L226 Difference]: Without dead ends: 113688 [2022-11-19 08:15:09,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:09,904 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:09,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 184 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:15:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113688 states. [2022-11-19 08:15:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113688 to 108683. [2022-11-19 08:15:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108683 states, 108682 states have (on average 1.1303895769308625) internal successors, (122853), 108682 states have internal predecessors, (122853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108683 states to 108683 states and 122853 transitions. [2022-11-19 08:15:12,119 INFO L78 Accepts]: Start accepts. Automaton has 108683 states and 122853 transitions. Word has length 318 [2022-11-19 08:15:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:12,119 INFO L495 AbstractCegarLoop]: Abstraction has 108683 states and 122853 transitions. [2022-11-19 08:15:12,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 108683 states and 122853 transitions. [2022-11-19 08:15:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-11-19 08:15:12,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:12,148 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:12,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 08:15:12,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:12,349 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash -96209338, now seen corresponding path program 1 times [2022-11-19 08:15:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:12,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943320647] [2022-11-19 08:15:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 189 proven. 3 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:15:12,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943320647] [2022-11-19 08:15:12,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943320647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891689114] [2022-11-19 08:15:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:12,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:12,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:12,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:12,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:15:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:15:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 08:15:13,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:13,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891689114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:13,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:13,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 08:15:13,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617608672] [2022-11-19 08:15:13,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:13,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:13,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:13,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:13,609 INFO L87 Difference]: Start difference. First operand 108683 states and 122853 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:15,036 INFO L93 Difference]: Finished difference Result 212360 states and 240245 transitions. [2022-11-19 08:15:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 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 324 [2022-11-19 08:15:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:15,145 INFO L225 Difference]: With dead ends: 212360 [2022-11-19 08:15:15,145 INFO L226 Difference]: Without dead ends: 96528 [2022-11-19 08:15:15,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:15,196 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 116 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:15,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 216 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:15:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96528 states. [2022-11-19 08:15:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96528 to 79797. [2022-11-19 08:15:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79797 states, 79796 states have (on average 1.1302571557471552) internal successors, (90190), 79796 states have internal predecessors, (90190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79797 states to 79797 states and 90190 transitions. [2022-11-19 08:15:17,277 INFO L78 Accepts]: Start accepts. Automaton has 79797 states and 90190 transitions. Word has length 324 [2022-11-19 08:15:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:17,278 INFO L495 AbstractCegarLoop]: Abstraction has 79797 states and 90190 transitions. [2022-11-19 08:15:17,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 79797 states and 90190 transitions. [2022-11-19 08:15:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-11-19 08:15:17,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:17,296 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:17,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:17,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 08:15:17,496 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:17,497 INFO L85 PathProgramCache]: Analyzing trace with hash 479781447, now seen corresponding path program 1 times [2022-11-19 08:15:17,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766229584] [2022-11-19 08:15:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:17,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-19 08:15:17,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:17,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766229584] [2022-11-19 08:15:17,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766229584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:17,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:17,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:15:17,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312161920] [2022-11-19 08:15:17,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:17,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:15:17,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:17,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:15:17,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:17,899 INFO L87 Difference]: Start difference. First operand 79797 states and 90190 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:19,676 INFO L93 Difference]: Finished difference Result 156590 states and 177172 transitions. [2022-11-19 08:15:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:15:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 327 [2022-11-19 08:15:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:19,757 INFO L225 Difference]: With dead ends: 156590 [2022-11-19 08:15:19,757 INFO L226 Difference]: Without dead ends: 79225 [2022-11-19 08:15:19,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:19,789 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 233 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:19,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 38 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:15:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79225 states. [2022-11-19 08:15:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79225 to 78653. [2022-11-19 08:15:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78653 states, 78652 states have (on average 1.1303717642272288) internal successors, (88906), 78652 states have internal predecessors, (88906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78653 states to 78653 states and 88906 transitions. [2022-11-19 08:15:21,070 INFO L78 Accepts]: Start accepts. Automaton has 78653 states and 88906 transitions. Word has length 327 [2022-11-19 08:15:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:21,070 INFO L495 AbstractCegarLoop]: Abstraction has 78653 states and 88906 transitions. [2022-11-19 08:15:21,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 78653 states and 88906 transitions. [2022-11-19 08:15:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-19 08:15:21,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:21,089 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:21,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 08:15:21,089 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1219460898, now seen corresponding path program 1 times [2022-11-19 08:15:21,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:21,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231936425] [2022-11-19 08:15:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 198 proven. 3 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-19 08:15:22,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231936425] [2022-11-19 08:15:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231936425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881073661] [2022-11-19 08:15:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:22,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:22,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:22,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:22,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:15:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:22,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:15:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:15:22,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:22,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881073661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:22,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:15:22,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-19 08:15:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686705603] [2022-11-19 08:15:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:22,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:15:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:15:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:22,597 INFO L87 Difference]: Start difference. First operand 78653 states and 88906 transitions. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:24,674 INFO L93 Difference]: Finished difference Result 155446 states and 175936 transitions. [2022-11-19 08:15:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:15:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 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 330 [2022-11-19 08:15:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:24,752 INFO L225 Difference]: With dead ends: 155446 [2022-11-19 08:15:24,752 INFO L226 Difference]: Without dead ends: 77652 [2022-11-19 08:15:24,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:24,771 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 395 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:24,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 52 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:15:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77652 states. [2022-11-19 08:15:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77652 to 71217. [2022-11-19 08:15:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71217 states, 71216 states have (on average 1.1087957762300606) internal successors, (78964), 71216 states have internal predecessors, (78964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71217 states to 71217 states and 78964 transitions. [2022-11-19 08:15:26,010 INFO L78 Accepts]: Start accepts. Automaton has 71217 states and 78964 transitions. Word has length 330 [2022-11-19 08:15:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:26,011 INFO L495 AbstractCegarLoop]: Abstraction has 71217 states and 78964 transitions. [2022-11-19 08:15:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 71217 states and 78964 transitions. [2022-11-19 08:15:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-11-19 08:15:26,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:26,029 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:26,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:26,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68cd145a-07e9-4276-bca1-00b8259574e6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:15:26,230 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash -331510631, now seen corresponding path program 1 times [2022-11-19 08:15:26,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:26,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357074849] [2022-11-19 08:15:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:26,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:15:26,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:26,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357074849] [2022-11-19 08:15:26,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357074849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:26,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:26,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:15:26,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117396854] [2022-11-19 08:15:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:15:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:15:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:26,701 INFO L87 Difference]: Start difference. First operand 71217 states and 78964 transitions. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)