./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 38b53e6a 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_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/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_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur --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-38b53e6 [2022-11-25 23:41:02,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:41:02,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:41:02,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:41:02,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:41:02,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:41:02,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:41:02,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:41:02,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:41:02,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:41:02,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:41:02,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:41:02,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:41:02,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:41:02,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:41:02,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:41:02,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:41:02,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:41:02,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:41:02,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:41:02,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:41:02,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:41:02,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:41:02,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:41:02,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:41:02,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:41:02,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:41:02,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:41:02,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:41:02,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:41:02,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:41:02,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:41:02,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:41:02,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:41:02,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:41:02,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:41:02,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:41:02,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:41:02,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:41:02,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:41:02,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:41:02,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:41:02,723 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:41:02,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:41:02,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:41:02,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:41:02,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:41:02,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:41:02,726 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:41:02,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:41:02,727 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:41:02,727 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:41:02,728 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:41:02,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:41:02,729 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:41:02,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:41:02,729 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:41:02,730 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:41:02,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:41:02,730 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:41:02,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:41:02,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:41:02,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:41:02,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:41:02,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:41:02,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:41:02,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:41:02,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:41:02,733 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:41:02,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:41:02,734 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:41:02,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:41:02,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:41:02,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:41:02,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:41:02,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:41:02,736 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:41:02,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:41:02,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:41:02,737 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:41:02,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:41:02,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:41:02,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:41:02,738 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_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dd7176ec9512a8a603e4cceffab6b6f1677decce373a9b5c36f88d73957ca4d [2022-11-25 23:41:03,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:41:03,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:41:03,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:41:03,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:41:03,041 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:41:03,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c [2022-11-25 23:41:06,059 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:41:06,832 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:41:06,832 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c [2022-11-25 23:41:06,882 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/data/c5ac2b719/be505acdd41748649cf027ee5bb4cc10/FLAGe43cc29a6 [2022-11-25 23:41:06,900 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/data/c5ac2b719/be505acdd41748649cf027ee5bb4cc10 [2022-11-25 23:41:06,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:41:06,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:41:06,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:41:06,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:41:06,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:41:06,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:41:06" (1/1) ... [2022-11-25 23:41:06,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1f81b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:06, skipping insertion in model container [2022-11-25 23:41:06,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:41:06" (1/1) ... [2022-11-25 23:41:06,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:41:07,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:41:09,546 WARN L237 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_bd18da17-55b5-4d9c-b8e4-a229389838fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[378560,378573] [2022-11-25 23:41:09,578 WARN L237 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_bd18da17-55b5-4d9c-b8e4-a229389838fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[383339,383352] [2022-11-25 23:41:09,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:41:09,906 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:41:11,110 WARN L237 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_bd18da17-55b5-4d9c-b8e4-a229389838fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[378560,378573] [2022-11-25 23:41:11,121 WARN L237 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_bd18da17-55b5-4d9c-b8e4-a229389838fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.11.cil-2.c[383339,383352] [2022-11-25 23:41:11,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:41:11,224 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:41:11,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11 WrapperNode [2022-11-25 23:41:11,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:41:11,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:41:11,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:41:11,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:41:11,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:11,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:11,728 INFO L138 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13141 [2022-11-25 23:41:11,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:41:11,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:41:11,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:41:11,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:41:11,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:11,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:11,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:11,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:12,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:12,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:12,174 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:12,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:12,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:41:12,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:41:12,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:41:12,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:41:12,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (1/1) ... [2022-11-25 23:41:12,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:41:12,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:12,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:41:12,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:41:12,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:41:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-25 23:41:12,567 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-25 23:41:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 23:41:12,567 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 23:41:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-25 23:41:12,568 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-25 23:41:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-25 23:41:12,568 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-25 23:41:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-25 23:41:12,568 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-25 23:41:12,568 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-25 23:41:12,569 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-25 23:41:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:41:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:41:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:41:12,800 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:41:12,802 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:41:21,716 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:41:24,372 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:41:24,372 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-25 23:41:24,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:41:24 BoogieIcfgContainer [2022-11-25 23:41:24,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:41:24,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:41:24,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:41:24,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:41:24,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:41:06" (1/3) ... [2022-11-25 23:41:24,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9db250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:41:24, skipping insertion in model container [2022-11-25 23:41:24,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:41:11" (2/3) ... [2022-11-25 23:41:24,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9db250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:41:24, skipping insertion in model container [2022-11-25 23:41:24,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:41:24" (3/3) ... [2022-11-25 23:41:24,389 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.11.cil-2.c [2022-11-25 23:41:24,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:41:24,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 23:41:24,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:41:24,519 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;@35fade12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:41:24,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 23:41:24,532 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) [2022-11-25 23:41:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 23:41:24,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:24,544 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] [2022-11-25 23:41:24,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 279460769, now seen corresponding path program 1 times [2022-11-25 23:41:24,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:24,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182474925] [2022-11-25 23:41:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:25,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:25,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182474925] [2022-11-25 23:41:25,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182474925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:25,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:25,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:41:25,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318295434] [2022-11-25 23:41:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:25,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:41:25,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:41:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:41:25,091 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) [2022-11-25 23:41:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:26,266 INFO L93 Difference]: Finished difference Result 3800 states and 7371 transitions. [2022-11-25 23:41:26,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:41:26,268 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 [2022-11-25 23:41:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:26,295 INFO L225 Difference]: With dead ends: 3800 [2022-11-25 23:41:26,295 INFO L226 Difference]: Without dead ends: 1979 [2022-11-25 23:41:26,306 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 [2022-11-25 23:41:26,312 INFO L413 NwaCegarLoop]: 3481 mSDtfsCounter, 3746 mSDsluCounter, 3387 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:26,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3746 Valid, 6868 Invalid, 724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:41:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-25 23:41:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2022-11-25 23:41:26,556 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) [2022-11-25 23:41:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3780 transitions. [2022-11-25 23:41:26,568 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3780 transitions. Word has length 64 [2022-11-25 23:41:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:26,569 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3780 transitions. [2022-11-25 23:41:26,570 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) [2022-11-25 23:41:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3780 transitions. [2022-11-25 23:41:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 23:41:26,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:26,587 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] [2022-11-25 23:41:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:41:26,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1365945954, now seen corresponding path program 1 times [2022-11-25 23:41:26,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:26,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624631508] [2022-11-25 23:41:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:26,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:41:26,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624631508] [2022-11-25 23:41:26,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624631508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584842678] [2022-11-25 23:41:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:26,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:26,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:26,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:26,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:41:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:27,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:41:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:41:27,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:27,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584842678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:27,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:41:27,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:41:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918295466] [2022-11-25 23:41:27,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:27,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:27,324 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) [2022-11-25 23:41:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:27,866 INFO L93 Difference]: Finished difference Result 2635 states and 4805 transitions. [2022-11-25 23:41:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:27,867 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 [2022-11-25 23:41:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:27,879 INFO L225 Difference]: With dead ends: 2635 [2022-11-25 23:41:27,879 INFO L226 Difference]: Without dead ends: 2303 [2022-11-25 23:41:27,881 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 [2022-11-25 23:41:27,882 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3501 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:27,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3536 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:41:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-11-25 23:41:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2022-11-25 23:41:27,944 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) [2022-11-25 23:41:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4265 transitions. [2022-11-25 23:41:27,954 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4265 transitions. Word has length 129 [2022-11-25 23:41:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:27,955 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 4265 transitions. [2022-11-25 23:41:27,955 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) [2022-11-25 23:41:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4265 transitions. [2022-11-25 23:41:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 23:41:27,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:27,959 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] [2022-11-25 23:41:27,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:28,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:28,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 854562340, now seen corresponding path program 1 times [2022-11-25 23:41:28,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:28,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806686304] [2022-11-25 23:41:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:28,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:41:28,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:28,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806686304] [2022-11-25 23:41:28,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806686304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432730792] [2022-11-25 23:41:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:28,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:28,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:28,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:41:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:28,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:41:28,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:41:28,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:28,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432730792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:28,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:41:28,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:41:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140900089] [2022-11-25 23:41:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:28,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:28,785 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) [2022-11-25 23:41:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:29,349 INFO L93 Difference]: Finished difference Result 3592 states and 6276 transitions. [2022-11-25 23:41:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:29,349 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 [2022-11-25 23:41:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:29,366 INFO L225 Difference]: With dead ends: 3592 [2022-11-25 23:41:29,366 INFO L226 Difference]: Without dead ends: 2939 [2022-11-25 23:41:29,372 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 [2022-11-25 23:41:29,375 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3507 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:29,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3535 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:41:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2022-11-25 23:41:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2022-11-25 23:41:29,485 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) [2022-11-25 23:41:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5219 transitions. [2022-11-25 23:41:29,499 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5219 transitions. Word has length 129 [2022-11-25 23:41:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:29,499 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 5219 transitions. [2022-11-25 23:41:29,499 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) [2022-11-25 23:41:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5219 transitions. [2022-11-25 23:41:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 23:41:29,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:29,505 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] [2022-11-25 23:41:29,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:29,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:29,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1218173850, now seen corresponding path program 1 times [2022-11-25 23:41:29,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:29,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168634988] [2022-11-25 23:41:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:29,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:41:29,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168634988] [2022-11-25 23:41:29,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168634988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212998494] [2022-11-25 23:41:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:29,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:29,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:29,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:30,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:41:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:30,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:41:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 23:41:30,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:30,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212998494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:30,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:41:30,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:41:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53042396] [2022-11-25 23:41:30,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:30,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:30,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:30,331 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) [2022-11-25 23:41:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:30,899 INFO L93 Difference]: Finished difference Result 5482 states and 9168 transitions. [2022-11-25 23:41:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:30,900 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 [2022-11-25 23:41:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:30,923 INFO L225 Difference]: With dead ends: 5482 [2022-11-25 23:41:30,923 INFO L226 Difference]: Without dead ends: 4195 [2022-11-25 23:41:30,930 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 [2022-11-25 23:41:30,933 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3510 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:30,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3510 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:41:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-11-25 23:41:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2022-11-25 23:41:31,115 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) [2022-11-25 23:41:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 7095 transitions. [2022-11-25 23:41:31,134 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 7095 transitions. Word has length 129 [2022-11-25 23:41:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:31,135 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 7095 transitions. [2022-11-25 23:41:31,135 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) [2022-11-25 23:41:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 7095 transitions. [2022-11-25 23:41:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 23:41:31,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:31,143 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] [2022-11-25 23:41:31,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:31,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:31,350 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1357195548, now seen corresponding path program 1 times [2022-11-25 23:41:31,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:31,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921171935] [2022-11-25 23:41:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:41:31,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:31,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921171935] [2022-11-25 23:41:31,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921171935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:31,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590880504] [2022-11-25 23:41:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:31,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:31,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:41:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:31,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:41:31,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:41:32,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:32,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590880504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:32,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:41:32,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:41:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496998751] [2022-11-25 23:41:32,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:32,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:32,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:32,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:32,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:32,038 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) [2022-11-25 23:41:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:32,702 INFO L93 Difference]: Finished difference Result 9214 states and 14852 transitions. [2022-11-25 23:41:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:32,703 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 [2022-11-25 23:41:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:32,735 INFO L225 Difference]: With dead ends: 9214 [2022-11-25 23:41:32,735 INFO L226 Difference]: Without dead ends: 6675 [2022-11-25 23:41:32,748 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 [2022-11-25 23:41:32,748 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3489 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:32,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:41:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2022-11-25 23:41:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2022-11-25 23:41:33,049 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) [2022-11-25 23:41:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10783 transitions. [2022-11-25 23:41:33,077 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10783 transitions. Word has length 129 [2022-11-25 23:41:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:33,078 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 10783 transitions. [2022-11-25 23:41:33,079 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) [2022-11-25 23:41:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10783 transitions. [2022-11-25 23:41:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 23:41:33,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:33,092 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] [2022-11-25 23:41:33,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:33,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:33,299 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:33,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1392782938, now seen corresponding path program 1 times [2022-11-25 23:41:33,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:33,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370530509] [2022-11-25 23:41:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:41:33,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:33,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370530509] [2022-11-25 23:41:33,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370530509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:33,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555456785] [2022-11-25 23:41:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:33,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:33,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:33,470 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:33,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:41:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:41:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:41:33,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:33,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555456785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:33,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:41:33,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:41:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905615284] [2022-11-25 23:41:33,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:33,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:33,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:33,809 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) [2022-11-25 23:41:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:34,591 INFO L93 Difference]: Finished difference Result 16582 states and 26020 transitions. [2022-11-25 23:41:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:34,592 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 [2022-11-25 23:41:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:34,677 INFO L225 Difference]: With dead ends: 16582 [2022-11-25 23:41:34,677 INFO L226 Difference]: Without dead ends: 11571 [2022-11-25 23:41:34,697 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 [2022-11-25 23:41:34,700 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3483 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:34,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:41:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2022-11-25 23:41:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2022-11-25 23:41:35,282 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) [2022-11-25 23:41:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 18031 transitions. [2022-11-25 23:41:35,326 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 18031 transitions. Word has length 129 [2022-11-25 23:41:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:35,327 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 18031 transitions. [2022-11-25 23:41:35,327 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) [2022-11-25 23:41:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 18031 transitions. [2022-11-25 23:41:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 23:41:35,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:35,345 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] [2022-11-25 23:41:35,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:41:35,555 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -86473240, now seen corresponding path program 1 times [2022-11-25 23:41:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720336440] [2022-11-25 23:41:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:35,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:41:35,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:35,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720336440] [2022-11-25 23:41:35,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720336440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:35,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851805665] [2022-11-25 23:41:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:35,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:35,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:35,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:35,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:41:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:41:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:41:36,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:36,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851805665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:36,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:41:36,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-25 23:41:36,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264928937] [2022-11-25 23:41:36,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:36,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:36,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:36,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:36,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:36,073 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) [2022-11-25 23:41:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:37,409 INFO L93 Difference]: Finished difference Result 31126 states and 47956 transitions. [2022-11-25 23:41:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:37,410 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 [2022-11-25 23:41:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:37,507 INFO L225 Difference]: With dead ends: 31126 [2022-11-25 23:41:37,508 INFO L226 Difference]: Without dead ends: 21235 [2022-11-25 23:41:37,551 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 [2022-11-25 23:41:37,552 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 3495 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:37,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 3504 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:41:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21235 states. [2022-11-25 23:41:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21235 to 21169. [2022-11-25 23:41:38,784 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) [2022-11-25 23:41:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21169 states to 21169 states and 32271 transitions. [2022-11-25 23:41:38,897 INFO L78 Accepts]: Start accepts. Automaton has 21169 states and 32271 transitions. Word has length 129 [2022-11-25 23:41:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:38,898 INFO L495 AbstractCegarLoop]: Abstraction has 21169 states and 32271 transitions. [2022-11-25 23:41:38,898 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) [2022-11-25 23:41:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21169 states and 32271 transitions. [2022-11-25 23:41:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 23:41:38,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:38,937 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] [2022-11-25 23:41:38,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:39,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd18da17-55b5-4d9c-b8e4-a229389838fd/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:41:39,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash -49354966, now seen corresponding path program 1 times [2022-11-25 23:41:39,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:39,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280658257] [2022-11-25 23:41:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:39,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 23:41:39,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:39,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280658257] [2022-11-25 23:41:39,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280658257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:39,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:39,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:41:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470485329] [2022-11-25 23:41:39,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:39,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:41:39,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:39,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:41:39,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:39,925 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) [2022-11-25 23:41:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:42,979 INFO L93 Difference]: Finished difference Result 66869 states and 100498 transitions. [2022-11-25 23:41:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:41:42,980 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 [2022-11-25 23:41:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:43,192 INFO L225 Difference]: With dead ends: 66869 [2022-11-25 23:41:43,193 INFO L226 Difference]: Without dead ends: 47347 [2022-11-25 23:41:43,262 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 [2022-11-25 23:41:43,263 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 4192 mSDsluCounter, 6529 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4212 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, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:43,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4212 Valid, 9834 Invalid, 1052 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [135 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:41:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2022-11-25 23:41:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 39921. [2022-11-25 23:41:45,674 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) [2022-11-25 23:41:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39921 states to 39921 states and 59855 transitions. [2022-11-25 23:41:45,900 INFO L78 Accepts]: Start accepts. Automaton has 39921 states and 59855 transitions. Word has length 129 [2022-11-25 23:41:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:45,900 INFO L495 AbstractCegarLoop]: Abstraction has 39921 states and 59855 transitions. [2022-11-25 23:41:45,901 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) [2022-11-25 23:41:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39921 states and 59855 transitions. [2022-11-25 23:41:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 23:41:45,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:45,963 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] [2022-11-25 23:41:45,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:41:45,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash -861684159, now seen corresponding path program 1 times [2022-11-25 23:41:45,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:45,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036239363] [2022-11-25 23:41:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:45,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 23:41:46,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:46,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036239363] [2022-11-25 23:41:46,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036239363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:46,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:46,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:41:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675026432] [2022-11-25 23:41:46,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:41:46,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:41:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:46,541 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) [2022-11-25 23:41:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:52,314 INFO L93 Difference]: Finished difference Result 125941 states and 187986 transitions. [2022-11-25 23:41:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:41:52,315 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 [2022-11-25 23:41:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:52,718 INFO L225 Difference]: With dead ends: 125941 [2022-11-25 23:41:52,718 INFO L226 Difference]: Without dead ends: 87667 [2022-11-25 23:41:52,840 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 [2022-11-25 23:41:52,842 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 4126 mSDsluCounter, 9658 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4146 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, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:52,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4146 Valid, 12933 Invalid, 1338 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 23:41:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87667 states. [2022-11-25 23:41:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87667 to 76657. [2022-11-25 23:41:57,508 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) [2022-11-25 23:41:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76657 states to 76657 states and 113615 transitions. [2022-11-25 23:41:57,876 INFO L78 Accepts]: Start accepts. Automaton has 76657 states and 113615 transitions. Word has length 130 [2022-11-25 23:41:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:57,877 INFO L495 AbstractCegarLoop]: Abstraction has 76657 states and 113615 transitions. [2022-11-25 23:41:57,877 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) [2022-11-25 23:41:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 76657 states and 113615 transitions. [2022-11-25 23:41:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-25 23:41:58,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:58,272 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] [2022-11-25 23:41:58,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 23:41:58,272 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1858390666, now seen corresponding path program 1 times [2022-11-25 23:41:58,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128982626] [2022-11-25 23:41:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:58,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 23:41:58,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:58,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128982626] [2022-11-25 23:41:58,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128982626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:58,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:58,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:41:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288021374] [2022-11-25 23:41:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:58,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:41:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:41:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:41:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:41:58,790 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)