./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI --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 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 --- 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-5e519f3 [2022-11-03 03:53:54,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:53:54,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:53:54,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:53:54,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:53:54,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:53:54,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:53:54,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:53:54,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:53:54,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:53:54,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:53:54,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:53:54,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:53:54,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:53:54,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:53:54,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:53:54,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:53:54,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:53:54,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:53:54,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:53:54,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:53:54,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:53:54,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:53:54,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:53:54,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:53:54,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:53:54,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:53:54,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:53:54,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:53:54,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:53:54,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:53:54,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:53:54,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:53:54,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:53:54,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:53:54,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:53:54,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:53:54,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:53:54,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:53:54,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:53:54,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:53:54,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:53:54,508 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:53:54,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:53:54,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:53:54,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:53:54,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:53:54,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:53:54,519 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:53:54,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:53:54,520 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:53:54,520 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:53:54,521 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:53:54,521 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:53:54,522 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:53:54,522 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:53:54,522 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:53:54,522 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:53:54,523 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:53:54,523 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:53:54,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:53:54,524 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:53:54,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:53:54,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:53:54,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:53:54,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:53:54,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:53:54,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:53:54,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:53:54,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:53:54,536 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:53:54,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:53:54,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:53:54,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:53:54,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:53:54,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:53:54,537 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:53:54,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:53:54,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:53:54,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:53:54,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:53:54,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:53:54,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:53:54,538 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_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 [2022-11-03 03:53:54,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:53:54,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:53:54,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:53:54,886 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:53:54,894 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:53:54,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2022-11-03 03:53:54,969 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/data/78bfef1ae/9dc0f99c8757424fb5cf50437a457620/FLAG627a5224d [2022-11-03 03:53:55,710 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:53:55,711 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2022-11-03 03:53:55,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/data/78bfef1ae/9dc0f99c8757424fb5cf50437a457620/FLAG627a5224d [2022-11-03 03:53:55,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/data/78bfef1ae/9dc0f99c8757424fb5cf50437a457620 [2022-11-03 03:53:55,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:53:55,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:53:55,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:55,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:53:55,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:53:55,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:55" (1/1) ... [2022-11-03 03:53:55,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9cf84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:55, skipping insertion in model container [2022-11-03 03:53:55,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:53:55" (1/1) ... [2022-11-03 03:53:55,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:53:55,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:53:56,376 WARN L230 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_46751dc2-2114-4302-9231-d0cfd58540a7/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-11-03 03:53:56,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:56,627 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:53:56,689 WARN L230 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_46751dc2-2114-4302-9231-d0cfd58540a7/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-11-03 03:53:56,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:53:56,790 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:53:56,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56 WrapperNode [2022-11-03 03:53:56,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:53:56,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:56,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:53:56,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:53:56,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,898 INFO L138 Inliner]: procedures = 89, calls = 330, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 812 [2022-11-03 03:53:56,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:53:56,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:53:56,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:53:56,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:53:56,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,992 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:56,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:57,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:53:57,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:53:57,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:53:57,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:53:57,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (1/1) ... [2022-11-03 03:53:57,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:53:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:57,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:53:57,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:53:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:53:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:53:57,124 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:53:57,124 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:53:57,124 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:53:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:53:57,125 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:53:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:53:57,125 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:53:57,125 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:53:57,126 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:53:57,126 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:53:57,126 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:53:57,126 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 03:53:57,126 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 03:53:57,126 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:53:57,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:53:57,127 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:53:57,127 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:53:57,127 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:53:57,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:53:57,127 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:53:57,128 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:53:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:53:57,128 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:53:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:53:57,128 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:53:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:53:57,129 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:53:57,129 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:53:57,129 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:53:57,129 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:53:57,129 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:53:57,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:53:57,130 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:53:57,130 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:53:57,130 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:53:57,130 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:53:57,130 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:53:57,131 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:53:57,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:53:57,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:53:57,131 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:53:57,131 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:53:57,273 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:53:57,276 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:53:58,399 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:53:59,215 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:53:59,215 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:53:59,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:59 BoogieIcfgContainer [2022-11-03 03:53:59,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:53:59,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:53:59,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:53:59,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:53:59,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:53:55" (1/3) ... [2022-11-03 03:53:59,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec502f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:59, skipping insertion in model container [2022-11-03 03:53:59,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:53:56" (2/3) ... [2022-11-03 03:53:59,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec502f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:53:59, skipping insertion in model container [2022-11-03 03:53:59,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:53:59" (3/3) ... [2022-11-03 03:53:59,230 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product09.cil.c [2022-11-03 03:53:59,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:53:59,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:53:59,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:53:59,356 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;@6e8c1e19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:53:59,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:53:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-03 03:53:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 03:53:59,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:59,401 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] [2022-11-03 03:53:59,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1896799847, now seen corresponding path program 1 times [2022-11-03 03:53:59,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:59,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786196246] [2022-11-03 03:53:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:59,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:59,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:59,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786196246] [2022-11-03 03:53:59,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786196246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:59,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:59,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:53:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884045626] [2022-11-03 03:53:59,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:53:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:53:59,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:53:59,886 INFO L87 Difference]: Start difference. First operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 03:54:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:00,074 INFO L93 Difference]: Finished difference Result 359 states and 579 transitions. [2022-11-03 03:54:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:54:00,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2022-11-03 03:54:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:00,092 INFO L225 Difference]: With dead ends: 359 [2022-11-03 03:54:00,092 INFO L226 Difference]: Without dead ends: 337 [2022-11-03 03:54:00,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:54:00,099 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:00,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 513 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:54:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-03 03:54:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-11-03 03:54:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 231 states have (on average 1.619047619047619) internal successors, (374), 250 states have internal predecessors, (374), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-03 03:54:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 541 transitions. [2022-11-03 03:54:00,174 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 541 transitions. Word has length 51 [2022-11-03 03:54:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:00,176 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 541 transitions. [2022-11-03 03:54:00,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 03:54:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 541 transitions. [2022-11-03 03:54:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 03:54:00,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:00,181 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] [2022-11-03 03:54:00,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:54:00,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2062405011, now seen corresponding path program 1 times [2022-11-03 03:54:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:00,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17669798] [2022-11-03 03:54:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:00,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:00,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:00,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17669798] [2022-11-03 03:54:00,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17669798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:00,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:00,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:54:00,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191483926] [2022-11-03 03:54:00,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:00,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:54:00,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:00,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:54:00,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:54:00,672 INFO L87 Difference]: Start difference. First operand 337 states and 541 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:54:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:03,106 INFO L93 Difference]: Finished difference Result 1142 states and 1868 transitions. [2022-11-03 03:54:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:54:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-03 03:54:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:03,121 INFO L225 Difference]: With dead ends: 1142 [2022-11-03 03:54:03,121 INFO L226 Difference]: Without dead ends: 821 [2022-11-03 03:54:03,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:54:03,137 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 1612 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:03,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1673 Valid, 2011 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 03:54:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-03 03:54:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 772. [2022-11-03 03:54:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 549 states have (on average 1.6466302367941712) internal successors, (904), 584 states have internal predecessors, (904), 181 states have call successors, (181), 39 states have call predecessors, (181), 41 states have return successors, (182), 173 states have call predecessors, (182), 176 states have call successors, (182) [2022-11-03 03:54:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1267 transitions. [2022-11-03 03:54:03,258 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1267 transitions. Word has length 52 [2022-11-03 03:54:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:03,259 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1267 transitions. [2022-11-03 03:54:03,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:54:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1267 transitions. [2022-11-03 03:54:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 03:54:03,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:03,263 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] [2022-11-03 03:54:03,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:54:03,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1178978120, now seen corresponding path program 1 times [2022-11-03 03:54:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:03,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385296090] [2022-11-03 03:54:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:03,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:03,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385296090] [2022-11-03 03:54:03,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385296090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:03,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:03,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:54:03,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542550470] [2022-11-03 03:54:03,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:54:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:54:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:03,496 INFO L87 Difference]: Start difference. First operand 772 states and 1267 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:54:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:03,696 INFO L93 Difference]: Finished difference Result 1302 states and 2142 transitions. [2022-11-03 03:54:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:03,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-11-03 03:54:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:03,703 INFO L225 Difference]: With dead ends: 1302 [2022-11-03 03:54:03,703 INFO L226 Difference]: Without dead ends: 842 [2022-11-03 03:54:03,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:03,707 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 41 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:03,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2141 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:54:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-03 03:54:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 784. [2022-11-03 03:54:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 558 states have (on average 1.636200716845878) internal successors, (913), 593 states have internal predecessors, (913), 181 states have call successors, (181), 39 states have call predecessors, (181), 44 states have return successors, (188), 176 states have call predecessors, (188), 176 states have call successors, (188) [2022-11-03 03:54:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1282 transitions. [2022-11-03 03:54:03,798 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1282 transitions. Word has length 56 [2022-11-03 03:54:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:03,801 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1282 transitions. [2022-11-03 03:54:03,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 03:54:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1282 transitions. [2022-11-03 03:54:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 03:54:03,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:03,805 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] [2022-11-03 03:54:03,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:54:03,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2120203216, now seen corresponding path program 1 times [2022-11-03 03:54:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:03,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053837544] [2022-11-03 03:54:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:04,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:04,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053837544] [2022-11-03 03:54:04,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053837544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:04,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:04,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:54:04,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778281068] [2022-11-03 03:54:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:04,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:54:04,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:54:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:54:04,174 INFO L87 Difference]: Start difference. First operand 784 states and 1282 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 03:54:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:06,475 INFO L93 Difference]: Finished difference Result 1791 states and 2921 transitions. [2022-11-03 03:54:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:54:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2022-11-03 03:54:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:06,485 INFO L225 Difference]: With dead ends: 1791 [2022-11-03 03:54:06,485 INFO L226 Difference]: Without dead ends: 1223 [2022-11-03 03:54:06,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:54:06,497 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 3023 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 1335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3166 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1335 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:06,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3166 Valid, 1421 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1335 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 03:54:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-11-03 03:54:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1129. [2022-11-03 03:54:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5903919089759797) internal successors, (1258), 843 states have internal predecessors, (1258), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-11-03 03:54:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1808 transitions. [2022-11-03 03:54:06,620 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1808 transitions. Word has length 60 [2022-11-03 03:54:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:06,621 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1808 transitions. [2022-11-03 03:54:06,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 03:54:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1808 transitions. [2022-11-03 03:54:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:54:06,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:06,626 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] [2022-11-03 03:54:06,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:54:06,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1068971566, now seen corresponding path program 1 times [2022-11-03 03:54:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:06,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444511186] [2022-11-03 03:54:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:06,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444511186] [2022-11-03 03:54:06,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444511186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:06,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:06,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:54:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617963040] [2022-11-03 03:54:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:54:06,801 INFO L87 Difference]: Start difference. First operand 1129 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:54:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:07,048 INFO L93 Difference]: Finished difference Result 2186 states and 3555 transitions. [2022-11-03 03:54:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:54:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2022-11-03 03:54:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:07,056 INFO L225 Difference]: With dead ends: 2186 [2022-11-03 03:54:07,056 INFO L226 Difference]: Without dead ends: 1129 [2022-11-03 03:54:07,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:07,062 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 210 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:07,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1380 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:54:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-11-03 03:54:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1129. [2022-11-03 03:54:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5499367888748419) internal successors, (1226), 843 states have internal predecessors, (1226), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-11-03 03:54:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1776 transitions. [2022-11-03 03:54:07,188 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1776 transitions. Word has length 63 [2022-11-03 03:54:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:07,188 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1776 transitions. [2022-11-03 03:54:07,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:54:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1776 transitions. [2022-11-03 03:54:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:54:07,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:07,191 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:54:07,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:54:07,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1510403678, now seen corresponding path program 1 times [2022-11-03 03:54:07,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:07,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572605268] [2022-11-03 03:54:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:54:07,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:07,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572605268] [2022-11-03 03:54:07,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572605268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:07,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:07,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:54:07,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146217399] [2022-11-03 03:54:07,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:07,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:54:07,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:54:07,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:54:07,504 INFO L87 Difference]: Start difference. First operand 1129 states and 1776 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:54:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:09,331 INFO L93 Difference]: Finished difference Result 2173 states and 3433 transitions. [2022-11-03 03:54:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:54:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2022-11-03 03:54:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:09,340 INFO L225 Difference]: With dead ends: 2173 [2022-11-03 03:54:09,340 INFO L226 Difference]: Without dead ends: 1317 [2022-11-03 03:54:09,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:54:09,345 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 893 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:09,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 1722 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 03:54:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-11-03 03:54:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1156. [2022-11-03 03:54:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 809 states have (on average 1.542645241038319) internal successors, (1248), 865 states have internal predecessors, (1248), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-03 03:54:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1810 transitions. [2022-11-03 03:54:09,429 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1810 transitions. Word has length 65 [2022-11-03 03:54:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:09,430 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1810 transitions. [2022-11-03 03:54:09,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:54:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1810 transitions. [2022-11-03 03:54:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:54:09,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:09,432 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:54:09,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:54:09,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1979741027, now seen corresponding path program 1 times [2022-11-03 03:54:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:09,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873535043] [2022-11-03 03:54:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:09,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:54:09,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:09,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873535043] [2022-11-03 03:54:09,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873535043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:09,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:09,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:54:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128623844] [2022-11-03 03:54:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:54:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:54:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:54:09,720 INFO L87 Difference]: Start difference. First operand 1156 states and 1810 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:54:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:10,308 INFO L93 Difference]: Finished difference Result 1228 states and 1923 transitions. [2022-11-03 03:54:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:10,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-11-03 03:54:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:10,319 INFO L225 Difference]: With dead ends: 1228 [2022-11-03 03:54:10,319 INFO L226 Difference]: Without dead ends: 1213 [2022-11-03 03:54:10,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:54:10,321 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 595 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:10,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 1656 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:54:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-11-03 03:54:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2022-11-03 03:54:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5399753997539976) internal successors, (1252), 869 states have internal predecessors, (1252), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-03 03:54:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1814 transitions. [2022-11-03 03:54:10,431 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1814 transitions. Word has length 72 [2022-11-03 03:54:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:10,432 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1814 transitions. [2022-11-03 03:54:10,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:54:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1814 transitions. [2022-11-03 03:54:10,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:54:10,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:10,437 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:54:10,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:54:10,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:10,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1176071550, now seen corresponding path program 1 times [2022-11-03 03:54:10,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201529519] [2022-11-03 03:54:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:54:10,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:10,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201529519] [2022-11-03 03:54:10,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201529519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:10,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:54:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926586022] [2022-11-03 03:54:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:10,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:54:10,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:54:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:10,663 INFO L87 Difference]: Start difference. First operand 1160 states and 1814 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-03 03:54:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:10,848 INFO L93 Difference]: Finished difference Result 1179 states and 1838 transitions. [2022-11-03 03:54:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:54:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-11-03 03:54:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:10,867 INFO L225 Difference]: With dead ends: 1179 [2022-11-03 03:54:10,867 INFO L226 Difference]: Without dead ends: 1164 [2022-11-03 03:54:10,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:54:10,869 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 30 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:10,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1970 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:54:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-03 03:54:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1160. [2022-11-03 03:54:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5362853628536286) internal successors, (1249), 869 states have internal predecessors, (1249), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-11-03 03:54:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1811 transitions. [2022-11-03 03:54:10,964 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1811 transitions. Word has length 77 [2022-11-03 03:54:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:10,964 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1811 transitions. [2022-11-03 03:54:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-03 03:54:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1811 transitions. [2022-11-03 03:54:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:54:10,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:10,972 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 03:54:10,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:54:10,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 818600832, now seen corresponding path program 1 times [2022-11-03 03:54:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:10,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39749775] [2022-11-03 03:54:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:10,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:54:11,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:11,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39749775] [2022-11-03 03:54:11,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39749775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:11,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:11,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:54:11,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328263861] [2022-11-03 03:54:11,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:11,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:11,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:54:11,237 INFO L87 Difference]: Start difference. First operand 1160 states and 1811 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:54:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:12,577 INFO L93 Difference]: Finished difference Result 3735 states and 5935 transitions. [2022-11-03 03:54:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:12,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-11-03 03:54:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:12,597 INFO L225 Difference]: With dead ends: 3735 [2022-11-03 03:54:12,597 INFO L226 Difference]: Without dead ends: 2591 [2022-11-03 03:54:12,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:12,606 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 1054 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:12,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 886 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:54:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-11-03 03:54:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2344. [2022-11-03 03:54:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1673 states have (on average 1.5457262402869096) internal successors, (2586), 1784 states have internal predecessors, (2586), 517 states have call successors, (517), 123 states have call predecessors, (517), 153 states have return successors, (594), 489 states have call predecessors, (594), 512 states have call successors, (594) [2022-11-03 03:54:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3697 transitions. [2022-11-03 03:54:12,822 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3697 transitions. Word has length 81 [2022-11-03 03:54:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:12,824 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 3697 transitions. [2022-11-03 03:54:12,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:54:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3697 transitions. [2022-11-03 03:54:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 03:54:12,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:12,827 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:54:12,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:54:12,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1377462244, now seen corresponding path program 1 times [2022-11-03 03:54:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:12,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388780875] [2022-11-03 03:54:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:12,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:54:13,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388780875] [2022-11-03 03:54:13,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388780875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:13,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:13,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:54:13,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074134960] [2022-11-03 03:54:13,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:54:13,075 INFO L87 Difference]: Start difference. First operand 2344 states and 3697 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:54:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:14,719 INFO L93 Difference]: Finished difference Result 7195 states and 11541 transitions. [2022-11-03 03:54:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:14,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-11-03 03:54:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:14,758 INFO L225 Difference]: With dead ends: 7195 [2022-11-03 03:54:14,758 INFO L226 Difference]: Without dead ends: 4870 [2022-11-03 03:54:14,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:14,775 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 1035 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:14,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 894 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:54:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-11-03 03:54:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4554. [2022-11-03 03:54:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 3280 states have (on average 1.5484756097560977) internal successors, (5079), 3513 states have internal predecessors, (5079), 964 states have call successors, (964), 235 states have call predecessors, (964), 309 states have return successors, (1190), 896 states have call predecessors, (1190), 959 states have call successors, (1190) [2022-11-03 03:54:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 7233 transitions. [2022-11-03 03:54:15,344 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 7233 transitions. Word has length 85 [2022-11-03 03:54:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:15,345 INFO L495 AbstractCegarLoop]: Abstraction has 4554 states and 7233 transitions. [2022-11-03 03:54:15,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:54:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 7233 transitions. [2022-11-03 03:54:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 03:54:15,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:15,349 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:54:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:54:15,349 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash 247930746, now seen corresponding path program 1 times [2022-11-03 03:54:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:15,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970784526] [2022-11-03 03:54:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:15,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:54:15,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:15,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970784526] [2022-11-03 03:54:15,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970784526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:15,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:15,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:54:15,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691928000] [2022-11-03 03:54:15,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:15,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:54:15,687 INFO L87 Difference]: Start difference. First operand 4554 states and 7233 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:54:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:17,614 INFO L93 Difference]: Finished difference Result 13885 states and 22609 transitions. [2022-11-03 03:54:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-03 03:54:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:17,692 INFO L225 Difference]: With dead ends: 13885 [2022-11-03 03:54:17,692 INFO L226 Difference]: Without dead ends: 9356 [2022-11-03 03:54:17,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:17,718 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 1022 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:17,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 903 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:54:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2022-11-03 03:54:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 8888. [2022-11-03 03:54:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8888 states, 6423 states have (on average 1.5453837770512222) internal successors, (9926), 6912 states have internal predecessors, (9926), 1831 states have call successors, (1831), 459 states have call predecessors, (1831), 633 states have return successors, (2517), 1683 states have call predecessors, (2517), 1826 states have call successors, (2517) [2022-11-03 03:54:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8888 states to 8888 states and 14274 transitions. [2022-11-03 03:54:18,841 INFO L78 Accepts]: Start accepts. Automaton has 8888 states and 14274 transitions. Word has length 86 [2022-11-03 03:54:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:18,842 INFO L495 AbstractCegarLoop]: Abstraction has 8888 states and 14274 transitions. [2022-11-03 03:54:18,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:54:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 8888 states and 14274 transitions. [2022-11-03 03:54:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 03:54:18,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:18,847 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 03:54:18,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:54:18,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:18,848 INFO L85 PathProgramCache]: Analyzing trace with hash -300431786, now seen corresponding path program 1 times [2022-11-03 03:54:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624618919] [2022-11-03 03:54:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:54:19,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:19,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624618919] [2022-11-03 03:54:19,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624618919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:19,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:19,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:54:19,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876171866] [2022-11-03 03:54:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:19,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:54:19,122 INFO L87 Difference]: Start difference. First operand 8888 states and 14274 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:54:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:22,133 INFO L93 Difference]: Finished difference Result 27035 states and 45273 transitions. [2022-11-03 03:54:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2022-11-03 03:54:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:22,270 INFO L225 Difference]: With dead ends: 27035 [2022-11-03 03:54:22,270 INFO L226 Difference]: Without dead ends: 18184 [2022-11-03 03:54:22,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:22,325 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 1015 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:22,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 915 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:54:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2022-11-03 03:54:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 17398. [2022-11-03 03:54:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17398 states, 12578 states have (on average 1.539274924471299) internal successors, (19361), 13603 states have internal predecessors, (19361), 3514 states have call successors, (3514), 907 states have call predecessors, (3514), 1305 states have return successors, (5684), 3206 states have call predecessors, (5684), 3509 states have call successors, (5684) [2022-11-03 03:54:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17398 states to 17398 states and 28559 transitions. [2022-11-03 03:54:24,460 INFO L78 Accepts]: Start accepts. Automaton has 17398 states and 28559 transitions. Word has length 84 [2022-11-03 03:54:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:24,461 INFO L495 AbstractCegarLoop]: Abstraction has 17398 states and 28559 transitions. [2022-11-03 03:54:24,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 03:54:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 17398 states and 28559 transitions. [2022-11-03 03:54:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:54:24,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:24,465 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:54:24,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:54:24,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2025169724, now seen corresponding path program 1 times [2022-11-03 03:54:24,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:24,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283354069] [2022-11-03 03:54:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:24,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:54:24,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:24,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283354069] [2022-11-03 03:54:24,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283354069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:24,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:24,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:54:24,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973273286] [2022-11-03 03:54:24,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:24,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:24,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:54:24,677 INFO L87 Difference]: Start difference. First operand 17398 states and 28559 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:54:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:29,238 INFO L93 Difference]: Finished difference Result 53027 states and 93549 transitions. [2022-11-03 03:54:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 88 [2022-11-03 03:54:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:29,501 INFO L225 Difference]: With dead ends: 53027 [2022-11-03 03:54:29,502 INFO L226 Difference]: Without dead ends: 35680 [2022-11-03 03:54:29,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:54:29,579 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1000 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:29,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 930 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:54:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35680 states. [2022-11-03 03:54:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35680 to 34044. [2022-11-03 03:54:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 24665 states have (on average 1.5361037907966755) internal successors, (37888), 26717 states have internal predecessors, (37888), 6778 states have call successors, (6778), 1800 states have call predecessors, (6778), 2600 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-03 03:54:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 57973 transitions. [2022-11-03 03:54:33,595 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 57973 transitions. Word has length 88 [2022-11-03 03:54:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:33,596 INFO L495 AbstractCegarLoop]: Abstraction has 34044 states and 57973 transitions. [2022-11-03 03:54:33,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 03:54:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 57973 transitions. [2022-11-03 03:54:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:54:33,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:33,606 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-11-03 03:54:33,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:54:33,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1607059054, now seen corresponding path program 1 times [2022-11-03 03:54:33,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:33,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200999858] [2022-11-03 03:54:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:33,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 03:54:33,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200999858] [2022-11-03 03:54:33,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200999858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616479425] [2022-11-03 03:54:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:33,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:33,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:33,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:54:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:54:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:54:34,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:34,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616479425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:34,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:54:34,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:54:34,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290467511] [2022-11-03 03:54:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:34,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:54:34,469 INFO L87 Difference]: Start difference. First operand 34044 states and 57973 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:54:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:38,232 INFO L93 Difference]: Finished difference Result 71815 states and 127334 transitions. [2022-11-03 03:54:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:38,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2022-11-03 03:54:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:38,485 INFO L225 Difference]: With dead ends: 71815 [2022-11-03 03:54:38,485 INFO L226 Difference]: Without dead ends: 37788 [2022-11-03 03:54:38,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:54:38,642 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 213 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:38,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1275 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:54:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37788 states. [2022-11-03 03:54:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37788 to 37788. [2022-11-03 03:54:42,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37788 states, 28313 states have (on average 1.5857026807473598) internal successors, (44896), 30365 states have internal predecessors, (44896), 6778 states have call successors, (6778), 1896 states have call predecessors, (6778), 2696 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-03 03:54:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37788 states to 37788 states and 64981 transitions. [2022-11-03 03:54:42,647 INFO L78 Accepts]: Start accepts. Automaton has 37788 states and 64981 transitions. Word has length 127 [2022-11-03 03:54:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:42,648 INFO L495 AbstractCegarLoop]: Abstraction has 37788 states and 64981 transitions. [2022-11-03 03:54:42,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:54:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 37788 states and 64981 transitions. [2022-11-03 03:54:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 03:54:42,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:42,657 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-11-03 03:54:42,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:42,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:54:42,874 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2086756243, now seen corresponding path program 1 times [2022-11-03 03:54:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:42,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626028973] [2022-11-03 03:54:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:42,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:54:44,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626028973] [2022-11-03 03:54:44,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626028973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:44,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376527622] [2022-11-03 03:54:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:44,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:44,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:54:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:54:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:54:44,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:44,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376527622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:44,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:54:44,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 03:54:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261535406] [2022-11-03 03:54:44,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:44,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:44,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:44,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:54:44,946 INFO L87 Difference]: Start difference. First operand 37788 states and 64981 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:54:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:48,048 INFO L93 Difference]: Finished difference Result 79303 states and 141251 transitions. [2022-11-03 03:54:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 132 [2022-11-03 03:54:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:48,289 INFO L225 Difference]: With dead ends: 79303 [2022-11-03 03:54:48,290 INFO L226 Difference]: Without dead ends: 41532 [2022-11-03 03:54:48,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:54:48,450 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 211 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:48,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1275 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:54:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41532 states. [2022-11-03 03:54:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41532 to 41532. [2022-11-03 03:54:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41532 states, 31961 states have (on average 1.6239792246800788) internal successors, (51904), 34013 states have internal predecessors, (51904), 6778 states have call successors, (6778), 1992 states have call predecessors, (6778), 2792 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-11-03 03:54:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41532 states to 41532 states and 71989 transitions. [2022-11-03 03:54:51,853 INFO L78 Accepts]: Start accepts. Automaton has 41532 states and 71989 transitions. Word has length 132 [2022-11-03 03:54:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:51,854 INFO L495 AbstractCegarLoop]: Abstraction has 41532 states and 71989 transitions. [2022-11-03 03:54:51,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:54:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 41532 states and 71989 transitions. [2022-11-03 03:54:51,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 03:54:51,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:51,866 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2022-11-03 03:54:51,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:52,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:54:52,084 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:52,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1487000355, now seen corresponding path program 1 times [2022-11-03 03:54:52,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:52,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577810710] [2022-11-03 03:54:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:52,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 03:54:53,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577810710] [2022-11-03 03:54:53,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577810710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506135430] [2022-11-03 03:54:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:53,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:53,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:53,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:53,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46751dc2-2114-4302-9231-d0cfd58540a7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:54:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:54,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:54:54,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 03:54:54,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:54,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506135430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:54,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:54:54,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-03 03:54:54,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035593225] [2022-11-03 03:54:54,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:54:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:54:54,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:54:54,431 INFO L87 Difference]: Start difference. First operand 41532 states and 71989 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:54:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:57,493 INFO L93 Difference]: Finished difference Result 86791 states and 155168 transitions. [2022-11-03 03:54:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:54:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 136 [2022-11-03 03:54:57,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:57,780 INFO L225 Difference]: With dead ends: 86791 [2022-11-03 03:54:57,781 INFO L226 Difference]: Without dead ends: 45276 [2022-11-03 03:54:58,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:54:58,048 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 209 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:58,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1275 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:54:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45276 states.