./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0 --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 0dd7176ec9512a8a603e4cceffab6b6f1677decce373a9b5c36f88d73957ca4d --- 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-e04fb08 [2022-11-16 20:04:30,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:04:30,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:04:30,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:04:30,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:04:30,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:04:30,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:04:30,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:04:30,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:04:30,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:04:30,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:04:30,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:04:30,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:04:30,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:04:30,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:04:30,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:04:30,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:04:30,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:04:30,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:04:30,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:04:30,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:04:30,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:04:30,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:04:30,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:04:30,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:04:30,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:04:30,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:04:30,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:04:30,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:04:30,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:04:30,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:04:30,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:04:30,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:04:30,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:04:30,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:04:30,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:04:30,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:04:30,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:04:30,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:04:30,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:04:30,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:04:30,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:04:30,523 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:04:30,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:04:30,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:04:30,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:04:30,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:04:30,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:04:30,526 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:04:30,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:04:30,526 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:04:30,531 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:04:30,532 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:04:30,532 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:04:30,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:04:30,533 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:04:30,533 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:04:30,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:04:30,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:04:30,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:04:30,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:04:30,536 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:04:30,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:04:30,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:04:30,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:04:30,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:04:30,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:04:30,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:04:30,538 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:04:30,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:04:30,539 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:04:30,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:04:30,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:04:30,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:04:30,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:04:30,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:04:30,541 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:04:30,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:04:30,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:04:30,542 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:04:30,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:04:30,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:04:30,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:04:30,543 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_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dd7176ec9512a8a603e4cceffab6b6f1677decce373a9b5c36f88d73957ca4d [2022-11-16 20:04:30,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:04:30,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:04:30,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:04:30,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:04:30,898 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:04:30,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c [2022-11-16 20:04:30,981 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/data/ccb418d16/6a78f51667a34b2facdec5bfd7867fe1/FLAG88e4bc0e2 [2022-11-16 20:04:32,295 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:04:32,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c [2022-11-16 20:04:32,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/data/ccb418d16/6a78f51667a34b2facdec5bfd7867fe1/FLAG88e4bc0e2 [2022-11-16 20:04:32,416 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/data/ccb418d16/6a78f51667a34b2facdec5bfd7867fe1 [2022-11-16 20:04:32,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:04:32,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:04:32,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:04:32,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:04:32,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:04:32,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:04:32" (1/1) ... [2022-11-16 20:04:32,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e33880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:32, skipping insertion in model container [2022-11-16 20:04:32,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:04:32" (1/1) ... [2022-11-16 20:04:32,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:04:32,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:04:35,831 WARN L229 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_d940658a-d71a-4f04-ab91-3910792379fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[378560,378573] [2022-11-16 20:04:35,874 WARN L229 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_d940658a-d71a-4f04-ab91-3910792379fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[383339,383352] [2022-11-16 20:04:36,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:04:36,237 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:04:37,791 WARN L229 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_d940658a-d71a-4f04-ab91-3910792379fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[378560,378573] [2022-11-16 20:04:37,806 WARN L229 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_d940658a-d71a-4f04-ab91-3910792379fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[383339,383352] [2022-11-16 20:04:37,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:04:37,972 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:04:37,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37 WrapperNode [2022-11-16 20:04:37,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:04:37,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:04:37,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:04:37,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:04:37,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:38,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:38,649 INFO L138 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13141 [2022-11-16 20:04:38,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:04:38,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:04:38,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:04:38,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:04:38,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:38,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:38,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:38,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:39,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:39,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:39,240 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:39,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:39,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:04:39,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:04:39,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:04:39,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:04:39,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (1/1) ... [2022-11-16 20:04:39,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:04:39,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:04:39,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:04:39,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:04:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:04:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-16 20:04:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-16 20:04:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 20:04:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 20:04:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-16 20:04:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-16 20:04:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-16 20:04:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-16 20:04:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-16 20:04:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-16 20:04:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-16 20:04:39,642 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-16 20:04:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:04:39,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:04:39,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:04:39,977 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:04:39,985 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:04:52,034 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:04:54,980 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:04:54,980 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-16 20:04:54,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:04:54 BoogieIcfgContainer [2022-11-16 20:04:54,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:04:54,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:04:54,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:04:54,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:04:54,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:04:32" (1/3) ... [2022-11-16 20:04:54,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d96eec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:04:54, skipping insertion in model container [2022-11-16 20:04:54,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:04:37" (2/3) ... [2022-11-16 20:04:54,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d96eec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:04:54, skipping insertion in model container [2022-11-16 20:04:54,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:04:54" (3/3) ... [2022-11-16 20:04:54,999 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.11.cil-2.c [2022-11-16 20:04:55,025 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:04:55,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 20:04:55,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:04:55,159 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;@18971950, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:04:55,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 20:04:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-16 20:04:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 20:04:55,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:04:55,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:04:55,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:04:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:04:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash 279460769, now seen corresponding path program 1 times [2022-11-16 20:04:55,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:04:55,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265828577] [2022-11-16 20:04:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:04:55,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:04:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:04:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:04:55,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:04:55,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265828577] [2022-11-16 20:04:55,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265828577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:04:55,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:04:55,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:04:55,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274980529] [2022-11-16 20:04:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:04:55,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:04:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:04:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:04:56,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:04:56,018 INFO L87 Difference]: Start difference. First operand has 1820 states, 1786 states have (on average 1.958006718924972) internal successors, (3497), 1789 states have internal predecessors, (3497), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:04:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:04:57,629 INFO L93 Difference]: Finished difference Result 3800 states and 7371 transitions. [2022-11-16 20:04:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:04:57,648 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-11-16 20:04:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:04:57,680 INFO L225 Difference]: With dead ends: 3800 [2022-11-16 20:04:57,680 INFO L226 Difference]: Without dead ends: 1979 [2022-11-16 20:04:57,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:04:57,694 INFO L413 NwaCegarLoop]: 3481 mSDtfsCounter, 3746 mSDsluCounter, 3387 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3746 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:04:57,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 6868 Invalid, 724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 20:04:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-16 20:04:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2022-11-16 20:04:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1918 states have (on average 1.9228362877997915) internal successors, (3688), 1921 states have internal predecessors, (3688), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-16 20:04:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3780 transitions. [2022-11-16 20:04:57,898 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3780 transitions. Word has length 64 [2022-11-16 20:04:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:04:57,899 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3780 transitions. [2022-11-16 20:04:57,900 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:04:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3780 transitions. [2022-11-16 20:04:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:04:57,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:04:57,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:04:57,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:04:57,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:04:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:04:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1365945954, now seen corresponding path program 1 times [2022-11-16 20:04:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:04:57,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959811670] [2022-11-16 20:04:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:04:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:04:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:04:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:04:58,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:04:58,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959811670] [2022-11-16 20:04:58,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959811670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:04:58,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681460648] [2022-11-16 20:04:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:04:58,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:04:58,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:04:58,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:04:58,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:04:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:04:58,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:04:58,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:04:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 20:04:59,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:04:59,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681460648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:04:59,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:04:59,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:04:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751318556] [2022-11-16 20:04:59,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:04:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:04:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:04:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:04:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:04:59,008 INFO L87 Difference]: Start difference. First operand 1978 states and 3780 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:04:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:04:59,911 INFO L93 Difference]: Finished difference Result 2635 states and 4805 transitions. [2022-11-16 20:04:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:04:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:04:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:04:59,927 INFO L225 Difference]: With dead ends: 2635 [2022-11-16 20:04:59,927 INFO L226 Difference]: Without dead ends: 2303 [2022-11-16 20:04:59,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:04:59,931 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3501 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:04:59,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3536 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 20:04:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-11-16 20:05:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2022-11-16 20:05:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2187 states have (on average 1.8715134887974394) internal successors, (4093), 2191 states have internal predecessors, (4093), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-16 20:05:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4265 transitions. [2022-11-16 20:05:00,045 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4265 transitions. Word has length 129 [2022-11-16 20:05:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:00,046 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 4265 transitions. [2022-11-16 20:05:00,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4265 transitions. [2022-11-16 20:05:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:05:00,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:00,052 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:00,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:05:00,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 20:05:00,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash 854562340, now seen corresponding path program 1 times [2022-11-16 20:05:00,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:00,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052528534] [2022-11-16 20:05:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:00,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:05:00,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052528534] [2022-11-16 20:05:00,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052528534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:05:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681252422] [2022-11-16 20:05:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:05:00,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:05:00,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:05:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:00,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:05:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:05:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 20:05:01,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:05:01,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681252422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:01,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:05:01,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:05:01,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350464660] [2022-11-16 20:05:01,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:01,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:05:01,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:01,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:05:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:01,040 INFO L87 Difference]: Start difference. First operand 2299 states and 4265 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:05:01,840 INFO L93 Difference]: Finished difference Result 3592 states and 6276 transitions. [2022-11-16 20:05:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:05:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:05:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:05:01,862 INFO L225 Difference]: With dead ends: 3592 [2022-11-16 20:05:01,863 INFO L226 Difference]: Without dead ends: 2939 [2022-11-16 20:05:01,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:01,874 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3507 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:05:01,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3535 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:05:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-11-16 20:05:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2022-11-16 20:05:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2719 states have (on average 1.7988230967267378) internal successors, (4891), 2725 states have internal predecessors, (4891), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-16 20:05:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5219 transitions. [2022-11-16 20:05:02,042 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5219 transitions. Word has length 129 [2022-11-16 20:05:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:02,043 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 5219 transitions. [2022-11-16 20:05:02,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5219 transitions. [2022-11-16 20:05:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:05:02,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:02,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:02,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:05:02,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:02,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1218173850, now seen corresponding path program 1 times [2022-11-16 20:05:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066740763] [2022-11-16 20:05:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:02,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:05:02,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:02,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066740763] [2022-11-16 20:05:02,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066740763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:05:02,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706610015] [2022-11-16 20:05:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:02,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:05:02,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:05:02,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:05:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:05:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:05:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 20:05:02,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:05:02,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706610015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:02,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:05:02,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:05:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494275068] [2022-11-16 20:05:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:02,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:05:02,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:05:02,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:02,885 INFO L87 Difference]: Start difference. First operand 2933 states and 5219 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:05:03,690 INFO L93 Difference]: Finished difference Result 5482 states and 9168 transitions. [2022-11-16 20:05:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:05:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:05:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:05:03,723 INFO L225 Difference]: With dead ends: 5482 [2022-11-16 20:05:03,724 INFO L226 Difference]: Without dead ends: 4195 [2022-11-16 20:05:03,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:03,736 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3510 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3510 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:05:03,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3510 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:05:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-11-16 20:05:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2022-11-16 20:05:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3771 states have (on average 1.7138690002651817) internal successors, (6463), 3781 states have internal predecessors, (6463), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-16 20:05:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 7095 transitions. [2022-11-16 20:05:04,038 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 7095 transitions. Word has length 129 [2022-11-16 20:05:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:04,039 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 7095 transitions. [2022-11-16 20:05:04,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 7095 transitions. [2022-11-16 20:05:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:05:04,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:04,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:04,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:05:04,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:04,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:04,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1357195548, now seen corresponding path program 1 times [2022-11-16 20:05:04,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:04,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660646880] [2022-11-16 20:05:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:05:04,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:04,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660646880] [2022-11-16 20:05:04,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660646880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:05:04,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496156693] [2022-11-16 20:05:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:04,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:04,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:05:04,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:05:04,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:05:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:05:04,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:05:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:05:05,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:05:05,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496156693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:05,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:05:05,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:05:05,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033496968] [2022-11-16 20:05:05,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:05,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:05:05,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:05:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:05,093 INFO L87 Difference]: Start difference. First operand 4185 states and 7095 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:05:06,001 INFO L93 Difference]: Finished difference Result 9214 states and 14852 transitions. [2022-11-16 20:05:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:05:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:05:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:05:06,042 INFO L225 Difference]: With dead ends: 9214 [2022-11-16 20:05:06,042 INFO L226 Difference]: Without dead ends: 6675 [2022-11-16 20:05:06,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:06,056 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3489 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:05:06,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:05:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2022-11-16 20:05:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2022-11-16 20:05:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5851 states have (on average 1.6337378225944283) internal successors, (9559), 5869 states have internal predecessors, (9559), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-16 20:05:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10783 transitions. [2022-11-16 20:05:06,476 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10783 transitions. Word has length 129 [2022-11-16 20:05:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:06,477 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 10783 transitions. [2022-11-16 20:05:06,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10783 transitions. [2022-11-16 20:05:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:05:06,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:06,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:06,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:05:06,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:06,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1392782938, now seen corresponding path program 1 times [2022-11-16 20:05:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:06,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314701562] [2022-11-16 20:05:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:05:06,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314701562] [2022-11-16 20:05:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314701562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:05:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849233885] [2022-11-16 20:05:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:07,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:05:07,001 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:05:07,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:05:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:07,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:05:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:05:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:05:07,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:05:07,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849233885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:07,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:05:07,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:05:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494792795] [2022-11-16 20:05:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:07,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:05:07,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:05:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:07,434 INFO L87 Difference]: Start difference. First operand 6657 states and 10783 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:05:08,732 INFO L93 Difference]: Finished difference Result 16582 states and 26020 transitions. [2022-11-16 20:05:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:05:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:05:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:05:08,837 INFO L225 Difference]: With dead ends: 16582 [2022-11-16 20:05:08,837 INFO L226 Difference]: Without dead ends: 11571 [2022-11-16 20:05:08,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:08,857 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3483 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:05:08,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 20:05:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2022-11-16 20:05:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2022-11-16 20:05:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 9963 states have (on average 1.571313861286761) internal successors, (15655), 9997 states have internal predecessors, (15655), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-16 20:05:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 18031 transitions. [2022-11-16 20:05:09,531 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 18031 transitions. Word has length 129 [2022-11-16 20:05:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:09,535 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 18031 transitions. [2022-11-16 20:05:09,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 18031 transitions. [2022-11-16 20:05:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:05:09,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:09,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:09,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:05:09,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:05:09,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -86473240, now seen corresponding path program 1 times [2022-11-16 20:05:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:09,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953349839] [2022-11-16 20:05:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:09,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:05:10,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953349839] [2022-11-16 20:05:10,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953349839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:05:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027906805] [2022-11-16 20:05:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:10,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:05:10,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:05:10,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:05:10,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:05:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:05:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:05:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:05:10,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:05:10,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027906805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:10,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:05:10,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:05:10,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058946741] [2022-11-16 20:05:10,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:10,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:05:10,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:05:10,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:10,424 INFO L87 Difference]: Start difference. First operand 11537 states and 18031 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:05:12,356 INFO L93 Difference]: Finished difference Result 31126 states and 47956 transitions. [2022-11-16 20:05:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:05:12,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:05:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:05:12,492 INFO L225 Difference]: With dead ends: 31126 [2022-11-16 20:05:12,492 INFO L226 Difference]: Without dead ends: 21235 [2022-11-16 20:05:12,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:12,553 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3495 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:05:12,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:05:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21235 states. [2022-11-16 20:05:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21235 to 21169. [2022-11-16 20:05:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21169 states, 18091 states have (on average 1.5286606599966834) internal successors, (27655), 18157 states have internal predecessors, (27655), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-16 20:05:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 32271 transitions. [2022-11-16 20:05:14,169 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 32271 transitions. Word has length 129 [2022-11-16 20:05:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:14,170 INFO L495 AbstractCegarLoop]: Abstraction has 21169 states and 32271 transitions. [2022-11-16 20:05:14,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:05:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 32271 transitions. [2022-11-16 20:05:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:05:14,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:14,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:14,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:05:14,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d940658a-d71a-4f04-ab91-3910792379fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:05:14,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash -49354966, now seen corresponding path program 1 times [2022-11-16 20:05:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:14,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367516589] [2022-11-16 20:05:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:14,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:05:15,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:15,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367516589] [2022-11-16 20:05:15,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367516589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:15,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:05:15,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:05:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987162178] [2022-11-16 20:05:15,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:15,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:05:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:05:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:15,336 INFO L87 Difference]: Start difference. First operand 21169 states and 32271 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:05:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:05:19,765 INFO L93 Difference]: Finished difference Result 66869 states and 100498 transitions. [2022-11-16 20:05:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:05:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-11-16 20:05:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:05:20,214 INFO L225 Difference]: With dead ends: 66869 [2022-11-16 20:05:20,215 INFO L226 Difference]: Without dead ends: 47347 [2022-11-16 20:05:20,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:05:20,285 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 4194 mSDsluCounter, 6529 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4214 SdHoareTripleChecker+Valid, 9834 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:05:20,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4214 Valid, 9834 Invalid, 1052 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [135 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 20:05:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2022-11-16 20:05:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 39921. [2022-11-16 20:05:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39921 states, 33899 states have (on average 1.5011357267176022) internal successors, (50887), 34029 states have internal predecessors, (50887), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2022-11-16 20:05:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39921 states to 39921 states and 59855 transitions. [2022-11-16 20:05:23,485 INFO L78 Accepts]: Start accepts. Automaton has 39921 states and 59855 transitions. Word has length 129 [2022-11-16 20:05:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:23,487 INFO L495 AbstractCegarLoop]: Abstraction has 39921 states and 59855 transitions. [2022-11-16 20:05:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:05:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 39921 states and 59855 transitions. [2022-11-16 20:05:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 20:05:23,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:23,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:05:23,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash -861684159, now seen corresponding path program 1 times [2022-11-16 20:05:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:23,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165332426] [2022-11-16 20:05:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:23,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:05:24,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:24,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165332426] [2022-11-16 20:05:24,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165332426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:24,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:05:24,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:05:24,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325339052] [2022-11-16 20:05:24,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:24,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:05:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:05:24,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:24,586 INFO L87 Difference]: Start difference. First operand 39921 states and 59855 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:05:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:05:31,821 INFO L93 Difference]: Finished difference Result 125941 states and 187986 transitions. [2022-11-16 20:05:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:05:31,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-16 20:05:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:05:32,439 INFO L225 Difference]: With dead ends: 125941 [2022-11-16 20:05:32,439 INFO L226 Difference]: Without dead ends: 87667 [2022-11-16 20:05:32,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:05:32,611 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 4128 mSDsluCounter, 9658 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4148 SdHoareTripleChecker+Valid, 12933 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:05:32,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4148 Valid, 12933 Invalid, 1338 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 20:05:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87667 states. [2022-11-16 20:05:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87667 to 76657. [2022-11-16 20:05:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76657 states, 64875 states have (on average 1.4828362235067438) internal successors, (96199), 65133 states have internal predecessors, (96199), 8708 states have call successors, (8708), 3072 states have call predecessors, (8708), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2022-11-16 20:05:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76657 states to 76657 states and 113615 transitions. [2022-11-16 20:05:38,890 INFO L78 Accepts]: Start accepts. Automaton has 76657 states and 113615 transitions. Word has length 130 [2022-11-16 20:05:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:05:38,891 INFO L495 AbstractCegarLoop]: Abstraction has 76657 states and 113615 transitions. [2022-11-16 20:05:38,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:05:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 76657 states and 113615 transitions. [2022-11-16 20:05:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 20:05:39,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:05:39,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:05:39,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:05:39,056 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:05:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:05:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1858390666, now seen corresponding path program 1 times [2022-11-16 20:05:39,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:05:39,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112759310] [2022-11-16 20:05:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:05:39,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:05:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:05:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:05:39,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:05:39,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112759310] [2022-11-16 20:05:39,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112759310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:05:39,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:05:39,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:05:39,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318896580] [2022-11-16 20:05:39,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:05:39,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:05:39,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:05:39,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:05:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:05:39,997 INFO L87 Difference]: Start difference. First operand 76657 states and 113615 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)