./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh --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 af1a65b4dba99a03062f9c0ef0e7df0ff9812521932f446bc475a13832d55c02 --- 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-2329fc7 [2022-12-14 14:43:24,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:43:24,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:43:24,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:43:24,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:43:24,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:43:24,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:43:24,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:43:24,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:43:24,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:43:24,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:43:24,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:43:24,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:43:24,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:43:24,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:43:24,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:43:24,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:43:24,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:43:24,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:43:24,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:43:24,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:43:24,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:43:24,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:43:24,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:43:24,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:43:24,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:43:24,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:43:24,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:43:24,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:43:24,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:43:24,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:43:24,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:43:24,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:43:24,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:43:24,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:43:24,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:43:24,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:43:24,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:43:24,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:43:24,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:43:24,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:43:24,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:43:24,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:43:24,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:43:24,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:43:24,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:43:24,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:43:24,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:43:24,179 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:43:24,179 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:43:24,180 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:43:24,180 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:43:24,181 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:43:24,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:43:24,181 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:43:24,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:43:24,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:43:24,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:43:24,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:43:24,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:43:24,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:43:24,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:43:24,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:43:24,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:43:24,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:43:24,183 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:43:24,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:43:24,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:43:24,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:43:24,184 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_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af1a65b4dba99a03062f9c0ef0e7df0ff9812521932f446bc475a13832d55c02 [2022-12-14 14:43:24,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:43:24,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:43:24,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:43:24,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:43:24,369 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:43:24,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c [2022-12-14 14:43:26,980 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:43:27,126 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:43:27,127 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c [2022-12-14 14:43:27,138 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/data/1e49a1b48/c80f13b1d3714a108731b7869a9b56bb/FLAGa3599d918 [2022-12-14 14:43:27,151 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/data/1e49a1b48/c80f13b1d3714a108731b7869a9b56bb [2022-12-14 14:43:27,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:43:27,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:43:27,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:43:27,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:43:27,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:43:27,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5d8bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27, skipping insertion in model container [2022-12-14 14:43:27,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:43:27,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:43:27,316 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_7a4aadc0-b629-48d5-b628-4e396898648e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[911,924] [2022-12-14 14:43:27,371 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_7a4aadc0-b629-48d5-b628-4e396898648e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[8416,8429] [2022-12-14 14:43:27,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:43:27,464 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:43:27,476 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_7a4aadc0-b629-48d5-b628-4e396898648e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[911,924] [2022-12-14 14:43:27,494 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_7a4aadc0-b629-48d5-b628-4e396898648e/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.15.cil.c[8416,8429] [2022-12-14 14:43:27,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:43:27,554 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:43:27,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27 WrapperNode [2022-12-14 14:43:27,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:43:27,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:43:27,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:43:27,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:43:27,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,609 INFO L138 Inliner]: procedures = 81, calls = 101, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1139 [2022-12-14 14:43:27,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:43:27,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:43:27,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:43:27,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:43:27,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:43:27,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:43:27,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:43:27,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:43:27,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (1/1) ... [2022-12-14 14:43:27,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:43:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:27,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:43:27,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:43:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:43:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 14:43:27,749 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 14:43:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 14:43:27,749 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 14:43:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 14:43:27,750 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 14:43:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 14:43:27,750 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 14:43:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 14:43:27,750 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 14:43:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 14:43:27,750 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 14:43:27,750 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 14:43:27,750 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 14:43:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 14:43:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 14:43:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 14:43:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 14:43:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 14:43:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 14:43:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 14:43:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 14:43:27,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:43:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 14:43:27,752 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 14:43:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 14:43:27,752 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 14:43:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:43:27,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:43:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 14:43:27,752 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 14:43:27,752 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 14:43:27,752 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 14:43:27,868 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:43:27,870 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:43:28,459 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-12-14 14:43:28,459 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-12-14 14:43:28,519 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:43:28,934 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:43:28,934 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-12-14 14:43:28,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:43:28 BoogieIcfgContainer [2022-12-14 14:43:28,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:43:28,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:43:28,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:43:28,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:43:28,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:43:27" (1/3) ... [2022-12-14 14:43:28,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194f72d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:43:28, skipping insertion in model container [2022-12-14 14:43:28,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:43:27" (2/3) ... [2022-12-14 14:43:28,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194f72d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:43:28, skipping insertion in model container [2022-12-14 14:43:28,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:43:28" (3/3) ... [2022-12-14 14:43:28,943 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.15.cil.c [2022-12-14 14:43:28,958 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:43:28,958 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 14:43:28,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:43:29,003 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;@23a24ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:43:29,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 14:43:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 284 states, 221 states have (on average 1.5520361990950227) internal successors, (343), 229 states have internal predecessors, (343), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-12-14 14:43:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 14:43:29,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:29,015 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] [2022-12-14 14:43:29,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:29,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1355386903, now seen corresponding path program 1 times [2022-12-14 14:43:29,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:29,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577259922] [2022-12-14 14:43:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:29,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:29,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577259922] [2022-12-14 14:43:29,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577259922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:29,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:29,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:43:29,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558476876] [2022-12-14 14:43:29,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:29,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:43:29,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:43:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:43:29,278 INFO L87 Difference]: Start difference. First operand has 284 states, 221 states have (on average 1.5520361990950227) internal successors, (343), 229 states have internal predecessors, (343), 45 states have call successors, (45), 15 states have call predecessors, (45), 15 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:43:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:29,714 INFO L93 Difference]: Finished difference Result 690 states and 1044 transitions. [2022-12-14 14:43:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:43:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-12-14 14:43:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:29,725 INFO L225 Difference]: With dead ends: 690 [2022-12-14 14:43:29,725 INFO L226 Difference]: Without dead ends: 407 [2022-12-14 14:43:29,729 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 [2022-12-14 14:43:29,731 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 483 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:29,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 748 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:43:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-14 14:43:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 396. [2022-12-14 14:43:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 302 states have (on average 1.466887417218543) internal successors, (443), 307 states have internal predecessors, (443), 65 states have call successors, (65), 29 states have call predecessors, (65), 27 states have return successors, (64), 61 states have call predecessors, (64), 61 states have call successors, (64) [2022-12-14 14:43:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 572 transitions. [2022-12-14 14:43:29,790 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 572 transitions. Word has length 44 [2022-12-14 14:43:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:29,791 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 572 transitions. [2022-12-14 14:43:29,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:43:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 572 transitions. [2022-12-14 14:43:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 14:43:29,793 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:29,793 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] [2022-12-14 14:43:29,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:43:29,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1251015022, now seen corresponding path program 1 times [2022-12-14 14:43:29,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:29,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905410567] [2022-12-14 14:43:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:29,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:29,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905410567] [2022-12-14 14:43:29,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905410567] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:29,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:29,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:43:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286886893] [2022-12-14 14:43:29,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:29,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:43:29,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:43:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:29,884 INFO L87 Difference]: Start difference. First operand 396 states and 572 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:43:30,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:30,517 INFO L93 Difference]: Finished difference Result 933 states and 1295 transitions. [2022-12-14 14:43:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:43:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 14:43:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:30,521 INFO L225 Difference]: With dead ends: 933 [2022-12-14 14:43:30,521 INFO L226 Difference]: Without dead ends: 467 [2022-12-14 14:43:30,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:43:30,523 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 1018 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:30,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 1266 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:43:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-12-14 14:43:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 382. [2022-12-14 14:43:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 288 states have (on average 1.4236111111111112) internal successors, (410), 293 states have internal predecessors, (410), 65 states have call successors, (65), 29 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-12-14 14:43:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 536 transitions. [2022-12-14 14:43:30,546 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 536 transitions. Word has length 45 [2022-12-14 14:43:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:30,547 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 536 transitions. [2022-12-14 14:43:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:43:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 536 transitions. [2022-12-14 14:43:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 14:43:30,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:30,548 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] [2022-12-14 14:43:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:43:30,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1205962278, now seen corresponding path program 1 times [2022-12-14 14:43:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:30,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160334492] [2022-12-14 14:43:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:30,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:30,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160334492] [2022-12-14 14:43:30,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160334492] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:30,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:30,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:43:30,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258086055] [2022-12-14 14:43:30,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:30,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:43:30,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:30,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:43:30,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:30,614 INFO L87 Difference]: Start difference. First operand 382 states and 536 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:43:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:31,191 INFO L93 Difference]: Finished difference Result 848 states and 1144 transitions. [2022-12-14 14:43:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:43:31,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-12-14 14:43:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:31,194 INFO L225 Difference]: With dead ends: 848 [2022-12-14 14:43:31,194 INFO L226 Difference]: Without dead ends: 671 [2022-12-14 14:43:31,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:43:31,195 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 926 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:31,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 1216 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:43:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-12-14 14:43:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 646. [2022-12-14 14:43:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 469 states have (on average 1.3411513859275053) internal successors, (629), 474 states have internal predecessors, (629), 114 states have call successors, (114), 63 states have call predecessors, (114), 61 states have return successors, (127), 110 states have call predecessors, (127), 110 states have call successors, (127) [2022-12-14 14:43:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 870 transitions. [2022-12-14 14:43:31,228 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 870 transitions. Word has length 46 [2022-12-14 14:43:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:31,228 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 870 transitions. [2022-12-14 14:43:31,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 14:43:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 870 transitions. [2022-12-14 14:43:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 14:43:31,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:31,230 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] [2022-12-14 14:43:31,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:43:31,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1992902898, now seen corresponding path program 1 times [2022-12-14 14:43:31,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:31,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119616662] [2022-12-14 14:43:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:31,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:31,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119616662] [2022-12-14 14:43:31,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119616662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:31,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:31,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:43:31,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318089323] [2022-12-14 14:43:31,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:31,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:31,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:31,266 INFO L87 Difference]: Start difference. First operand 646 states and 870 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:31,349 INFO L93 Difference]: Finished difference Result 647 states and 871 transitions. [2022-12-14 14:43:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2022-12-14 14:43:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:31,351 INFO L225 Difference]: With dead ends: 647 [2022-12-14 14:43:31,351 INFO L226 Difference]: Without dead ends: 203 [2022-12-14 14:43:31,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:43:31,353 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 380 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:31,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 331 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-14 14:43:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-12-14 14:43:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 167 states have (on average 1.5389221556886228) internal successors, (257), 169 states have internal predecessors, (257), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 14:43:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 313 transitions. [2022-12-14 14:43:31,362 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 313 transitions. Word has length 50 [2022-12-14 14:43:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:31,363 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 313 transitions. [2022-12-14 14:43:31,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 313 transitions. [2022-12-14 14:43:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 14:43:31,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:31,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:31,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:43:31,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1881687767, now seen corresponding path program 1 times [2022-12-14 14:43:31,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968980516] [2022-12-14 14:43:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:31,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:43:31,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968980516] [2022-12-14 14:43:31,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968980516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:31,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:31,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:43:31,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499741781] [2022-12-14 14:43:31,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:31,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:43:31,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:31,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:43:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:43:31,485 INFO L87 Difference]: Start difference. First operand 203 states and 313 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 14:43:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:32,289 INFO L93 Difference]: Finished difference Result 1146 states and 1885 transitions. [2022-12-14 14:43:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:43:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-12-14 14:43:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:32,293 INFO L225 Difference]: With dead ends: 1146 [2022-12-14 14:43:32,293 INFO L226 Difference]: Without dead ends: 949 [2022-12-14 14:43:32,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:43:32,295 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 1431 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:32,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 1463 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 14:43:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-12-14 14:43:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 936. [2022-12-14 14:43:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 787 states have (on average 1.5362134688691234) internal successors, (1209), 792 states have internal predecessors, (1209), 118 states have call successors, (118), 31 states have call predecessors, (118), 30 states have return successors, (182), 113 states have call predecessors, (182), 116 states have call successors, (182) [2022-12-14 14:43:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1509 transitions. [2022-12-14 14:43:32,342 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1509 transitions. Word has length 71 [2022-12-14 14:43:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:32,342 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1509 transitions. [2022-12-14 14:43:32,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 14:43:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1509 transitions. [2022-12-14 14:43:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:32,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:32,345 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:32,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:43:32,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1231705191, now seen corresponding path program 1 times [2022-12-14 14:43:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:32,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710717843] [2022-12-14 14:43:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:32,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:43:32,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:32,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710717843] [2022-12-14 14:43:32,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710717843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:32,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798977896] [2022-12-14 14:43:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:32,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:32,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:32,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:43:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:43:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 14:43:32,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:32,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798977896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:32,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:32,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:43:32,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117495869] [2022-12-14 14:43:32,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:32,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:32,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:32,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:32,797 INFO L87 Difference]: Start difference. First operand 936 states and 1509 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:33,017 INFO L93 Difference]: Finished difference Result 2780 states and 4618 transitions. [2022-12-14 14:43:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 14:43:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:33,025 INFO L225 Difference]: With dead ends: 2780 [2022-12-14 14:43:33,025 INFO L226 Difference]: Without dead ends: 1850 [2022-12-14 14:43:33,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:33,029 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 285 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:33,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 529 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-12-14 14:43:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1841. [2022-12-14 14:43:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1555 states have (on average 1.5331189710610933) internal successors, (2384), 1563 states have internal predecessors, (2384), 225 states have call successors, (225), 61 states have call predecessors, (225), 60 states have return successors, (351), 217 states have call predecessors, (351), 223 states have call successors, (351) [2022-12-14 14:43:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2960 transitions. [2022-12-14 14:43:33,114 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2960 transitions. Word has length 144 [2022-12-14 14:43:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:33,114 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2960 transitions. [2022-12-14 14:43:33,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2960 transitions. [2022-12-14 14:43:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:33,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:33,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:33,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:43:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:33,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash -753177307, now seen corresponding path program 1 times [2022-12-14 14:43:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:33,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330432432] [2022-12-14 14:43:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:43:33,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330432432] [2022-12-14 14:43:33,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330432432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897869222] [2022-12-14 14:43:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:33,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:33,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:33,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:33,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:43:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:43:33,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:43:33,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897869222] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:33,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:43:33,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215489038] [2022-12-14 14:43:33,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:33,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:33,725 INFO L87 Difference]: Start difference. First operand 1841 states and 2960 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:34,010 INFO L93 Difference]: Finished difference Result 5480 states and 9072 transitions. [2022-12-14 14:43:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 14:43:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:34,025 INFO L225 Difference]: With dead ends: 5480 [2022-12-14 14:43:34,025 INFO L226 Difference]: Without dead ends: 3645 [2022-12-14 14:43:34,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:34,033 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 276 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:34,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 529 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2022-12-14 14:43:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3631. [2022-12-14 14:43:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3076 states have (on average 1.52925877763329) internal successors, (4704), 3090 states have internal predecessors, (4704), 434 states have call successors, (434), 121 states have call predecessors, (434), 120 states have return successors, (680), 420 states have call predecessors, (680), 432 states have call successors, (680) [2022-12-14 14:43:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 5818 transitions. [2022-12-14 14:43:34,236 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 5818 transitions. Word has length 144 [2022-12-14 14:43:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:34,236 INFO L495 AbstractCegarLoop]: Abstraction has 3631 states and 5818 transitions. [2022-12-14 14:43:34,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 5818 transitions. [2022-12-14 14:43:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:34,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:34,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:34,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:43:34,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 14:43:34,444 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash 158197415, now seen corresponding path program 1 times [2022-12-14 14:43:34,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:34,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124723439] [2022-12-14 14:43:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:34,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:43:34,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:34,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124723439] [2022-12-14 14:43:34,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124723439] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081174073] [2022-12-14 14:43:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:34,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:34,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:34,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:34,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:43:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:34,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:43:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:43:34,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:34,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081174073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:34,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:34,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:43:34,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861717206] [2022-12-14 14:43:34,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:34,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:34,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:34,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:34,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:34,921 INFO L87 Difference]: Start difference. First operand 3631 states and 5818 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:35,264 INFO L93 Difference]: Finished difference Result 10820 states and 17839 transitions. [2022-12-14 14:43:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 14:43:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:35,289 INFO L225 Difference]: With dead ends: 10820 [2022-12-14 14:43:35,289 INFO L226 Difference]: Without dead ends: 7195 [2022-12-14 14:43:35,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:35,299 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 255 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:35,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 529 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7195 states. [2022-12-14 14:43:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7195 to 7171. [2022-12-14 14:43:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7171 states, 6088 states have (on average 1.5249671484888305) internal successors, (9284), 6114 states have internal predecessors, (9284), 842 states have call successors, (842), 241 states have call predecessors, (842), 240 states have return successors, (1320), 816 states have call predecessors, (1320), 840 states have call successors, (1320) [2022-12-14 14:43:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7171 states to 7171 states and 11446 transitions. [2022-12-14 14:43:35,724 INFO L78 Accepts]: Start accepts. Automaton has 7171 states and 11446 transitions. Word has length 144 [2022-12-14 14:43:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:35,724 INFO L495 AbstractCegarLoop]: Abstraction has 7171 states and 11446 transitions. [2022-12-14 14:43:35,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7171 states and 11446 transitions. [2022-12-14 14:43:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:35,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:35,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:35,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:43:35,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:35,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1197457435, now seen corresponding path program 1 times [2022-12-14 14:43:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:35,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262822670] [2022-12-14 14:43:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:43:36,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262822670] [2022-12-14 14:43:36,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262822670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:36,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941622495] [2022-12-14 14:43:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:36,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:36,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:36,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:43:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:43:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:43:36,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:36,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941622495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:36,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:36,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:43:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848071940] [2022-12-14 14:43:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:36,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:36,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:36,242 INFO L87 Difference]: Start difference. First operand 7171 states and 11446 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:36,946 INFO L93 Difference]: Finished difference Result 21380 states and 35091 transitions. [2022-12-14 14:43:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 14:43:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:37,002 INFO L225 Difference]: With dead ends: 21380 [2022-12-14 14:43:37,003 INFO L226 Difference]: Without dead ends: 14215 [2022-12-14 14:43:37,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:37,034 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 282 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:37,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 529 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14215 states. [2022-12-14 14:43:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14215 to 14171. [2022-12-14 14:43:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14171 states, 12052 states have (on average 1.5204115499502158) internal successors, (18324), 12102 states have internal predecessors, (18324), 1638 states have call successors, (1638), 481 states have call predecessors, (1638), 480 states have return successors, (2564), 1588 states have call predecessors, (2564), 1636 states have call successors, (2564) [2022-12-14 14:43:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14171 states to 14171 states and 22526 transitions. [2022-12-14 14:43:37,701 INFO L78 Accepts]: Start accepts. Automaton has 14171 states and 22526 transitions. Word has length 144 [2022-12-14 14:43:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:37,701 INFO L495 AbstractCegarLoop]: Abstraction has 14171 states and 22526 transitions. [2022-12-14 14:43:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 14171 states and 22526 transitions. [2022-12-14 14:43:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:37,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:37,714 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:37,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:43:37,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:37,915 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash 408817639, now seen corresponding path program 1 times [2022-12-14 14:43:37,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:37,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984403259] [2022-12-14 14:43:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:37,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:43:38,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:38,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984403259] [2022-12-14 14:43:38,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984403259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873372656] [2022-12-14 14:43:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:38,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:38,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:38,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:38,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:43:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:38,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:43:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:43:38,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:38,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873372656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:38,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:38,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:43:38,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328833519] [2022-12-14 14:43:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:38,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:38,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:38,295 INFO L87 Difference]: Start difference. First operand 14171 states and 22526 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:39,520 INFO L93 Difference]: Finished difference Result 42260 states and 69031 transitions. [2022-12-14 14:43:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 14:43:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:39,598 INFO L225 Difference]: With dead ends: 42260 [2022-12-14 14:43:39,598 INFO L226 Difference]: Without dead ends: 28095 [2022-12-14 14:43:39,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:39,635 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 264 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:39,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 529 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2022-12-14 14:43:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 28011. [2022-12-14 14:43:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28011 states, 23860 states have (on average 1.515674769488684) internal successors, (36164), 23958 states have internal predecessors, (36164), 3190 states have call successors, (3190), 961 states have call predecessors, (3190), 960 states have return successors, (4980), 3092 states have call predecessors, (4980), 3188 states have call successors, (4980) [2022-12-14 14:43:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28011 states to 28011 states and 44334 transitions. [2022-12-14 14:43:40,993 INFO L78 Accepts]: Start accepts. Automaton has 28011 states and 44334 transitions. Word has length 144 [2022-12-14 14:43:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:40,994 INFO L495 AbstractCegarLoop]: Abstraction has 28011 states and 44334 transitions. [2022-12-14 14:43:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 28011 states and 44334 transitions. [2022-12-14 14:43:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:41,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:41,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:41,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:43:41,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 14:43:41,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash 327761001, now seen corresponding path program 1 times [2022-12-14 14:43:41,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841161301] [2022-12-14 14:43:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:41,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:43:41,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841161301] [2022-12-14 14:43:41,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841161301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390496496] [2022-12-14 14:43:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:41,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:41,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:41,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:43:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:43:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 14:43:41,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:41,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390496496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:41,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:41,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:43:41,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136091732] [2022-12-14 14:43:41,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:41,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:41,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:41,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:41,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:41,650 INFO L87 Difference]: Start difference. First operand 28011 states and 44334 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:43,578 INFO L93 Difference]: Finished difference Result 83540 states and 135783 transitions. [2022-12-14 14:43:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 14:43:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:43,747 INFO L225 Difference]: With dead ends: 83540 [2022-12-14 14:43:43,747 INFO L226 Difference]: Without dead ends: 55535 [2022-12-14 14:43:43,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:43,824 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 270 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:43,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 529 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55535 states. [2022-12-14 14:43:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55535 to 55371. [2022-12-14 14:43:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55371 states, 47236 states have (on average 1.510796849860276) internal successors, (71364), 47430 states have internal predecessors, (71364), 6214 states have call successors, (6214), 1921 states have call predecessors, (6214), 1920 states have return successors, (9668), 6020 states have call predecessors, (9668), 6212 states have call successors, (9668) [2022-12-14 14:43:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55371 states to 55371 states and 87246 transitions. [2022-12-14 14:43:46,588 INFO L78 Accepts]: Start accepts. Automaton has 55371 states and 87246 transitions. Word has length 144 [2022-12-14 14:43:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:46,588 INFO L495 AbstractCegarLoop]: Abstraction has 55371 states and 87246 transitions. [2022-12-14 14:43:46,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 55371 states and 87246 transitions. [2022-12-14 14:43:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:46,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:46,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:46,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:43:46,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 14:43:46,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash 831356779, now seen corresponding path program 1 times [2022-12-14 14:43:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520482594] [2022-12-14 14:43:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:46,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:43:46,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:46,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520482594] [2022-12-14 14:43:46,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520482594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:43:46,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008826041] [2022-12-14 14:43:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:46,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:43:46,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:43:46,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:43:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:43:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:43:47,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:43:47,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008826041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:47,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:43:47,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:43:47,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520807263] [2022-12-14 14:43:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:47,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:43:47,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:47,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:43:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:47,159 INFO L87 Difference]: Start difference. First operand 55371 states and 87246 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:43:51,775 INFO L93 Difference]: Finished difference Result 165140 states and 267031 transitions. [2022-12-14 14:43:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:43:51,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-12-14 14:43:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:43:52,138 INFO L225 Difference]: With dead ends: 165140 [2022-12-14 14:43:52,138 INFO L226 Difference]: Without dead ends: 109775 [2022-12-14 14:43:52,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:52,279 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 261 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:43:52,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 529 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:43:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109775 states. [2022-12-14 14:43:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109775 to 109451. [2022-12-14 14:43:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109451 states, 93508 states have (on average 1.505796295504128) internal successors, (140804), 93894 states have internal predecessors, (140804), 12102 states have call successors, (12102), 3841 states have call predecessors, (12102), 3840 states have return successors, (18756), 11716 states have call predecessors, (18756), 12100 states have call successors, (18756) [2022-12-14 14:43:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109451 states to 109451 states and 171662 transitions. [2022-12-14 14:43:57,496 INFO L78 Accepts]: Start accepts. Automaton has 109451 states and 171662 transitions. Word has length 144 [2022-12-14 14:43:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:43:57,497 INFO L495 AbstractCegarLoop]: Abstraction has 109451 states and 171662 transitions. [2022-12-14 14:43:57,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 14:43:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 109451 states and 171662 transitions. [2022-12-14 14:43:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:43:57,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:43:57,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:43:57,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:43:57,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4aadc0-b629-48d5-b628-4e396898648e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:43:57,793 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:43:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:43:57,793 INFO L85 PathProgramCache]: Analyzing trace with hash 228291113, now seen corresponding path program 1 times [2022-12-14 14:43:57,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:43:57,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374067495] [2022-12-14 14:43:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:43:57,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:43:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:43:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:43:58,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:43:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374067495] [2022-12-14 14:43:58,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374067495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:43:58,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:43:58,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:43:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069308659] [2022-12-14 14:43:58,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:43:58,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:43:58,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:43:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:43:58,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:43:58,279 INFO L87 Difference]: Start difference. First operand 109451 states and 171662 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:44:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:06,972 INFO L93 Difference]: Finished difference Result 307347 states and 485460 transitions. [2022-12-14 14:44:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:44:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-12-14 14:44:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:07,756 INFO L225 Difference]: With dead ends: 307347 [2022-12-14 14:44:07,756 INFO L226 Difference]: Without dead ends: 197903 [2022-12-14 14:44:08,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:44:08,020 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1012 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:08,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1019 Valid, 1134 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:44:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197903 states. [2022-12-14 14:44:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197903 to 173579. [2022-12-14 14:44:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173579 states, 148228 states have (on average 1.49998650727258) internal successors, (222340), 148870 states have internal predecessors, (222340), 19206 states have call successors, (19206), 6145 states have call predecessors, (19206), 6144 states have return successors, (30660), 18564 states have call predecessors, (30660), 19204 states have call successors, (30660) [2022-12-14 14:44:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173579 states to 173579 states and 272206 transitions. [2022-12-14 14:44:16,834 INFO L78 Accepts]: Start accepts. Automaton has 173579 states and 272206 transitions. Word has length 144 [2022-12-14 14:44:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:16,835 INFO L495 AbstractCegarLoop]: Abstraction has 173579 states and 272206 transitions. [2022-12-14 14:44:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:44:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 173579 states and 272206 transitions. [2022-12-14 14:44:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:44:16,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:16,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 14:44:16,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:44:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1021921929, now seen corresponding path program 1 times [2022-12-14 14:44:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187045191] [2022-12-14 14:44:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:44:17,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:17,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187045191] [2022-12-14 14:44:17,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187045191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:17,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:44:17,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:44:17,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143879124] [2022-12-14 14:44:17,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:17,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:44:17,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:44:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:44:17,240 INFO L87 Difference]: Start difference. First operand 173579 states and 272206 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:44:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:32,762 INFO L93 Difference]: Finished difference Result 469267 states and 741972 transitions. [2022-12-14 14:44:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:44:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2022-12-14 14:44:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:33,760 INFO L225 Difference]: With dead ends: 469267 [2022-12-14 14:44:33,760 INFO L226 Difference]: Without dead ends: 295695 [2022-12-14 14:44:34,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:44:34,124 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 996 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:34,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 1012 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:44:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295695 states. [2022-12-14 14:44:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295695 to 258315. [2022-12-14 14:44:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258315 states, 220548 states have (on average 1.495928323992963) internal successors, (329924), 221510 states have internal predecessors, (329924), 28550 states have call successors, (28550), 9217 states have call predecessors, (28550), 9216 states have return successors, (45508), 27588 states have call predecessors, (45508), 28548 states have call successors, (45508) [2022-12-14 14:44:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258315 states to 258315 states and 403982 transitions. [2022-12-14 14:44:49,372 INFO L78 Accepts]: Start accepts. Automaton has 258315 states and 403982 transitions. Word has length 145 [2022-12-14 14:44:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:49,372 INFO L495 AbstractCegarLoop]: Abstraction has 258315 states and 403982 transitions. [2022-12-14 14:44:49,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:44:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 258315 states and 403982 transitions. [2022-12-14 14:44:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 14:44:49,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:49,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:49,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 14:44:49,518 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:44:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1913607899, now seen corresponding path program 1 times [2022-12-14 14:44:49,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:49,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098447104] [2022-12-14 14:44:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:44:49,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098447104] [2022-12-14 14:44:49,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098447104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:49,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:44:49,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:44:49,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45998714] [2022-12-14 14:44:49,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:49,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:44:49,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:49,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:44:49,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:44:49,813 INFO L87 Difference]: Start difference. First operand 258315 states and 403982 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:45:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:24,567 INFO L93 Difference]: Finished difference Result 865555 states and 1369173 transitions. [2022-12-14 14:45:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:45:24,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 146 [2022-12-14 14:45:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:27,059 INFO L225 Difference]: With dead ends: 865555 [2022-12-14 14:45:27,059 INFO L226 Difference]: Without dead ends: 607247 [2022-12-14 14:45:27,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:45:27,775 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 1118 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:27,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 734 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:45:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607247 states. [2022-12-14 14:45:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607247 to 507403. [2022-12-14 14:46:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507403 states, 433412 states have (on average 1.4905447934067353) internal successors, (646020), 435334 states have internal predecessors, (646020), 55558 states have call successors, (55558), 18433 states have call predecessors, (55558), 18432 states have return successors, (88132), 53636 states have call predecessors, (88132), 55556 states have call successors, (88132) [2022-12-14 14:46:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507403 states to 507403 states and 789710 transitions. [2022-12-14 14:46:02,256 INFO L78 Accepts]: Start accepts. Automaton has 507403 states and 789710 transitions. Word has length 146 [2022-12-14 14:46:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:02,257 INFO L495 AbstractCegarLoop]: Abstraction has 507403 states and 789710 transitions. [2022-12-14 14:46:02,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:46:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 507403 states and 789710 transitions. [2022-12-14 14:46:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 14:46:02,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:02,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:02,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 14:46:02,697 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash 970609677, now seen corresponding path program 1 times [2022-12-14 14:46:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:02,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690556374] [2022-12-14 14:46:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:02,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:46:02,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:02,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690556374] [2022-12-14 14:46:02,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690556374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:02,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:46:02,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:46:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682122988] [2022-12-14 14:46:02,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:02,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:46:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:46:02,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:46:02,982 INFO L87 Difference]: Start difference. First operand 507403 states and 789710 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:46:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:59,785 INFO L93 Difference]: Finished difference Result 1351443 states and 2124500 transitions. [2022-12-14 14:46:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:46:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 147 [2022-12-14 14:46:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:47:03,617 INFO L225 Difference]: With dead ends: 1351443 [2022-12-14 14:47:03,617 INFO L226 Difference]: Without dead ends: 844047 [2022-12-14 14:47:05,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:47:05,166 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1004 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:47:05,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 802 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:47:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844047 states. [2022-12-14 14:48:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844047 to 754955. [2022-12-14 14:48:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754955 states, 644740 states have (on average 1.4862983528243943) internal successors, (958276), 647622 states have internal predecessors, (958276), 82566 states have call successors, (82566), 27649 states have call predecessors, (82566), 27648 states have return successors, (130756), 79684 states have call predecessors, (130756), 82564 states have call successors, (130756) [2022-12-14 14:48:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754955 states to 754955 states and 1171598 transitions. [2022-12-14 14:48:04,593 INFO L78 Accepts]: Start accepts. Automaton has 754955 states and 1171598 transitions. Word has length 147 [2022-12-14 14:48:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:48:04,593 INFO L495 AbstractCegarLoop]: Abstraction has 754955 states and 1171598 transitions. [2022-12-14 14:48:04,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:48:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 754955 states and 1171598 transitions. [2022-12-14 14:48:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 14:48:05,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:48:05,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:48:05,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 14:48:05,131 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:48:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:48:05,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1772093535, now seen corresponding path program 1 times [2022-12-14 14:48:05,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:48:05,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827148846] [2022-12-14 14:48:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:48:05,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:48:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:48:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:48:05,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:48:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827148846] [2022-12-14 14:48:05,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827148846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:48:05,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:48:05,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:48:05,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834498264] [2022-12-14 14:48:05,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:48:05,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:48:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:48:05,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:48:05,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:48:05,641 INFO L87 Difference]: Start difference. First operand 754955 states and 1171598 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:50:16,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:16,437 INFO L93 Difference]: Finished difference Result 2467603 states and 3883989 transitions. [2022-12-14 14:50:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:50:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 148 [2022-12-14 14:50:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:24,811 INFO L225 Difference]: With dead ends: 2467603 [2022-12-14 14:50:24,811 INFO L226 Difference]: Without dead ends: 1712655 [2022-12-14 14:50:27,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:50:27,886 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 1055 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:27,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 716 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:50:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712655 states.