./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:33:49,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:33:49,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:33:49,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:33:49,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:33:49,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:33:49,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:33:49,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:33:49,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:33:49,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:33:49,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:33:49,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:33:49,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:33:49,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:33:49,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:33:49,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:33:49,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:33:49,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:33:49,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:33:49,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:33:49,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:33:49,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:33:49,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:33:49,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:33:49,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:33:49,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:33:49,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:33:49,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:33:49,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:33:49,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:33:49,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:33:49,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:33:49,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:33:49,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:33:49,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:33:49,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:33:49,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:33:49,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:33:49,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:33:49,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:33:49,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:33:49,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:33:49,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:33:49,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:33:49,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:33:49,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:33:49,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:33:49,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:33:49,184 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:33:49,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:33:49,185 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:33:49,185 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:33:49,186 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:33:49,186 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:33:49,186 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:33:49,187 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:33:49,187 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:33:49,187 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:33:49,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:33:49,188 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:33:49,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:33:49,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:33:49,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:33:49,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:33:49,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:33:49,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:33:49,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:33:49,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:33:49,191 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:33:49,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:33:49,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:33:49,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:33:49,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:33:49,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:33:49,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:33:49,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:33:49,193 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:33:49,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:33:49,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:33:49,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:33:49,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:33:49,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:33:49,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:33:49,195 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_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1240a0d3e559b8971965b03cecb352351a22be921567ab044722f9bb2872bc1 [2022-11-19 07:33:49,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:33:49,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:33:49,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:33:49,557 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:33:49,557 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:33:49,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-11-19 07:33:49,639 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/data/57cc92875/9ded58f6098d4ddab816a7985bf9936c/FLAGd533acebf [2022-11-19 07:33:50,294 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:33:50,295 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c [2022-11-19 07:33:50,319 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/data/57cc92875/9ded58f6098d4ddab816a7985bf9936c/FLAGd533acebf [2022-11-19 07:33:50,530 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/data/57cc92875/9ded58f6098d4ddab816a7985bf9936c [2022-11-19 07:33:50,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:33:50,534 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:33:50,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:33:50,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:33:50,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:33:50,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:50" (1/1) ... [2022-11-19 07:33:50,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc6576e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:50, skipping insertion in model container [2022-11-19 07:33:50,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:50" (1/1) ... [2022-11-19 07:33:50,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:33:50,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:33:51,069 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-11-19 07:33:51,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:33:51,247 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:33:51,301 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/sv-benchmarks/c/product-lines/elevator_spec2_product20.cil.c[38445,38458] [2022-11-19 07:33:51,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:33:51,377 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:33:51,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51 WrapperNode [2022-11-19 07:33:51,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:33:51,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:33:51,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:33:51,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:33:51,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,478 INFO L138 Inliner]: procedures = 96, calls = 346, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1134 [2022-11-19 07:33:51,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:33:51,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:33:51,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:33:51,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:33:51,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,586 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:33:51,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:33:51,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:33:51,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:33:51,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (1/1) ... [2022-11-19 07:33:51,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:33:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:51,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:33:51,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:33:51,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:33:51,726 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 07:33:51,726 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 07:33:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 07:33:51,727 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 07:33:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-19 07:33:51,727 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-19 07:33:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 07:33:51,727 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 07:33:51,727 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 07:33:51,728 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 07:33:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 07:33:51,728 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 07:33:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 07:33:51,728 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 07:33:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:33:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:33:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:33:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:33:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 07:33:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 07:33:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 07:33:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 07:33:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 07:33:51,730 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 07:33:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 07:33:51,730 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 07:33:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 07:33:51,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 07:33:51,731 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 07:33:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 07:33:51,732 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 07:33:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 07:33:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 07:33:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 07:33:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 07:33:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 07:33:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 07:33:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 07:33:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 07:33:51,734 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 07:33:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:33:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 07:33:51,735 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 07:33:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 07:33:51,761 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 07:33:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 07:33:51,762 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 07:33:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:33:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:33:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 07:33:51,763 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 07:33:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-19 07:33:51,764 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-19 07:33:52,040 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:33:52,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:33:53,226 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:33:53,998 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:33:53,998 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:33:54,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:54 BoogieIcfgContainer [2022-11-19 07:33:54,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:33:54,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:33:54,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:33:54,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:33:54,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:33:50" (1/3) ... [2022-11-19 07:33:54,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29000bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:54, skipping insertion in model container [2022-11-19 07:33:54,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:51" (2/3) ... [2022-11-19 07:33:54,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29000bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:54, skipping insertion in model container [2022-11-19 07:33:54,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:54" (3/3) ... [2022-11-19 07:33:54,015 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product20.cil.c [2022-11-19 07:33:54,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:33:54,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:33:54,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:33:54,146 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;@3554e656, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:33:54,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:33:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-19 07:33:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:33:54,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:54,172 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] [2022-11-19 07:33:54,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1900930352, now seen corresponding path program 1 times [2022-11-19 07:33:54,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:54,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983161998] [2022-11-19 07:33:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:54,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:33:54,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983161998] [2022-11-19 07:33:54,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983161998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:54,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:33:54,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:33:54,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223096984] [2022-11-19 07:33:54,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:54,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:33:54,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:33:54,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:33:54,753 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:33:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:54,977 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-11-19 07:33:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:33:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-19 07:33:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:55,006 INFO L225 Difference]: With dead ends: 401 [2022-11-19 07:33:55,007 INFO L226 Difference]: Without dead ends: 379 [2022-11-19 07:33:55,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:33:55,017 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:55,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:33:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-19 07:33:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-19 07:33:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-19 07:33:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-11-19 07:33:55,162 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-11-19 07:33:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:55,164 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-11-19 07:33:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 07:33:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-11-19 07:33:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:33:55,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:55,180 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] [2022-11-19 07:33:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:33:55,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash 941732160, now seen corresponding path program 1 times [2022-11-19 07:33:55,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:55,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82746156] [2022-11-19 07:33:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:55,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:33:55,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:55,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82746156] [2022-11-19 07:33:55,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82746156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:55,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:33:55,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:33:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629092642] [2022-11-19 07:33:55,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:55,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:33:55,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:55,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:33:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:33:55,735 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:33:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:58,288 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-11-19 07:33:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:33:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-19 07:33:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:58,310 INFO L225 Difference]: With dead ends: 1243 [2022-11-19 07:33:58,310 INFO L226 Difference]: Without dead ends: 880 [2022-11-19 07:33:58,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:33:58,318 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1226 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:58,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 1112 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:33:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-19 07:33:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-11-19 07:33:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2022-11-19 07:33:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-11-19 07:33:58,444 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-11-19 07:33:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:58,445 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-11-19 07:33:58,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:33:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-11-19 07:33:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:33:58,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:58,454 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:58,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:33:58,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 707766777, now seen corresponding path program 1 times [2022-11-19 07:33:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816154012] [2022-11-19 07:33:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:33:59,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816154012] [2022-11-19 07:33:59,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816154012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:33:59,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:33:59,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:33:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368971263] [2022-11-19 07:33:59,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:33:59,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:33:59,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:33:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:33:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:33:59,017 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:34:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:01,493 INFO L93 Difference]: Finished difference Result 2479 states and 4037 transitions. [2022-11-19 07:34:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:34:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-19 07:34:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:01,513 INFO L225 Difference]: With dead ends: 2479 [2022-11-19 07:34:01,513 INFO L226 Difference]: Without dead ends: 1703 [2022-11-19 07:34:01,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:34:01,520 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1159 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:01,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1663 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:34:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-11-19 07:34:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1616. [2022-11-19 07:34:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1143 states have (on average 1.6071741032370954) internal successors, (1837), 1199 states have internal predecessors, (1837), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-11-19 07:34:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2628 transitions. [2022-11-19 07:34:01,718 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2628 transitions. Word has length 88 [2022-11-19 07:34:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:01,720 INFO L495 AbstractCegarLoop]: Abstraction has 1616 states and 2628 transitions. [2022-11-19 07:34:01,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:34:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2628 transitions. [2022-11-19 07:34:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 07:34:01,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:01,727 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:01,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:34:01,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash 951706947, now seen corresponding path program 1 times [2022-11-19 07:34:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:01,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875406716] [2022-11-19 07:34:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:01,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:02,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875406716] [2022-11-19 07:34:02,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875406716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:02,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:02,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:34:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418905624] [2022-11-19 07:34:02,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:02,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:34:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:34:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:02,112 INFO L87 Difference]: Start difference. First operand 1616 states and 2628 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:34:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:02,839 INFO L93 Difference]: Finished difference Result 1715 states and 2790 transitions. [2022-11-19 07:34:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-19 07:34:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:02,860 INFO L225 Difference]: With dead ends: 1715 [2022-11-19 07:34:02,861 INFO L226 Difference]: Without dead ends: 1700 [2022-11-19 07:34:02,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:34:02,872 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 690 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:02,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1848 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:34:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-11-19 07:34:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1622. [2022-11-19 07:34:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1149 states have (on average 1.6040034812880766) internal successors, (1843), 1205 states have internal predecessors, (1843), 382 states have call successors, (382), 83 states have call predecessors, (382), 90 states have return successors, (409), 357 states have call predecessors, (409), 377 states have call successors, (409) [2022-11-19 07:34:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2634 transitions. [2022-11-19 07:34:03,009 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2634 transitions. Word has length 92 [2022-11-19 07:34:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:03,010 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2634 transitions. [2022-11-19 07:34:03,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:34:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2634 transitions. [2022-11-19 07:34:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 07:34:03,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:03,013 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:03,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:34:03,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash 827203565, now seen corresponding path program 1 times [2022-11-19 07:34:03,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:03,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369785602] [2022-11-19 07:34:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:03,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:03,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369785602] [2022-11-19 07:34:03,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369785602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:03,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:03,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:34:03,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663680133] [2022-11-19 07:34:03,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:03,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:34:03,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:34:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:34:03,521 INFO L87 Difference]: Start difference. First operand 1622 states and 2634 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-19 07:34:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:07,091 INFO L93 Difference]: Finished difference Result 4103 states and 6645 transitions. [2022-11-19 07:34:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:34:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-11-19 07:34:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:07,109 INFO L225 Difference]: With dead ends: 4103 [2022-11-19 07:34:07,109 INFO L226 Difference]: Without dead ends: 2497 [2022-11-19 07:34:07,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:34:07,124 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 998 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 5335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:07,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 2832 Invalid, 5335 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [390 Valid, 4945 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-19 07:34:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-11-19 07:34:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2414. [2022-11-19 07:34:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 1693 states have (on average 1.5871234494979327) internal successors, (2687), 1771 states have internal predecessors, (2687), 576 states have call successors, (576), 125 states have call predecessors, (576), 144 states have return successors, (621), 550 states have call predecessors, (621), 571 states have call successors, (621) [2022-11-19 07:34:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3884 transitions. [2022-11-19 07:34:07,334 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3884 transitions. Word has length 96 [2022-11-19 07:34:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:07,334 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 3884 transitions. [2022-11-19 07:34:07,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-19 07:34:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3884 transitions. [2022-11-19 07:34:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 07:34:07,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:07,344 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:07,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:34:07,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:07,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1965481963, now seen corresponding path program 1 times [2022-11-19 07:34:07,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:07,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147682649] [2022-11-19 07:34:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:07,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:07,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147682649] [2022-11-19 07:34:07,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147682649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:07,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:07,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:34:07,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605552449] [2022-11-19 07:34:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:07,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:34:07,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:34:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:07,699 INFO L87 Difference]: Start difference. First operand 2414 states and 3884 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:34:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:08,508 INFO L93 Difference]: Finished difference Result 2559 states and 4089 transitions. [2022-11-19 07:34:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:34:08,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-11-19 07:34:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:08,523 INFO L225 Difference]: With dead ends: 2559 [2022-11-19 07:34:08,523 INFO L226 Difference]: Without dead ends: 2544 [2022-11-19 07:34:08,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:34:08,525 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 623 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:08,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 2758 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:34:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-11-19 07:34:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2490. [2022-11-19 07:34:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1745 states have (on average 1.5787965616045845) internal successors, (2755), 1823 states have internal predecessors, (2755), 592 states have call successors, (592), 133 states have call predecessors, (592), 152 states have return successors, (647), 566 states have call predecessors, (647), 587 states have call successors, (647) [2022-11-19 07:34:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3994 transitions. [2022-11-19 07:34:08,738 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3994 transitions. Word has length 97 [2022-11-19 07:34:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:08,739 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3994 transitions. [2022-11-19 07:34:08,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:34:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3994 transitions. [2022-11-19 07:34:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-19 07:34:08,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:08,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:34:08,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1900539976, now seen corresponding path program 1 times [2022-11-19 07:34:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:08,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151056080] [2022-11-19 07:34:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:34:09,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:09,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151056080] [2022-11-19 07:34:09,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151056080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:09,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:09,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:09,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653314109] [2022-11-19 07:34:09,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:09,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:09,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:09,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:09,079 INFO L87 Difference]: Start difference. First operand 2490 states and 3994 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:10,834 INFO L93 Difference]: Finished difference Result 6763 states and 11044 transitions. [2022-11-19 07:34:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:10,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-11-19 07:34:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:10,867 INFO L225 Difference]: With dead ends: 6763 [2022-11-19 07:34:10,867 INFO L226 Difference]: Without dead ends: 4289 [2022-11-19 07:34:10,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:10,881 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1169 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:10,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 733 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:34:10,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-11-19 07:34:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3926. [2022-11-19 07:34:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 2756 states have (on average 1.5711175616835995) internal successors, (4330), 2886 states have internal predecessors, (4330), 922 states have call successors, (922), 203 states have call predecessors, (922), 247 states have return successors, (1078), 881 states have call predecessors, (1078), 917 states have call successors, (1078) [2022-11-19 07:34:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6330 transitions. [2022-11-19 07:34:11,284 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6330 transitions. Word has length 104 [2022-11-19 07:34:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:11,285 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 6330 transitions. [2022-11-19 07:34:11,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6330 transitions. [2022-11-19 07:34:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 07:34:11,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:11,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:11,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:34:11,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1212521930, now seen corresponding path program 1 times [2022-11-19 07:34:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:11,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912421118] [2022-11-19 07:34:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:34:11,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:11,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912421118] [2022-11-19 07:34:11,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912421118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:11,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:11,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701534615] [2022-11-19 07:34:11,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:11,618 INFO L87 Difference]: Start difference. First operand 3926 states and 6330 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:13,739 INFO L93 Difference]: Finished difference Result 11025 states and 18284 transitions. [2022-11-19 07:34:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:13,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-11-19 07:34:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:13,791 INFO L225 Difference]: With dead ends: 11025 [2022-11-19 07:34:13,791 INFO L226 Difference]: Without dead ends: 7118 [2022-11-19 07:34:13,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:13,816 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1156 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:13,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 742 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:34:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7118 states. [2022-11-19 07:34:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7118 to 6647. [2022-11-19 07:34:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6647 states, 4675 states have (on average 1.5670588235294118) internal successors, (7326), 4923 states have internal predecessors, (7326), 1532 states have call successors, (1532), 343 states have call predecessors, (1532), 439 states have return successors, (1994), 1455 states have call predecessors, (1994), 1527 states have call successors, (1994) [2022-11-19 07:34:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6647 states to 6647 states and 10852 transitions. [2022-11-19 07:34:14,618 INFO L78 Accepts]: Start accepts. Automaton has 6647 states and 10852 transitions. Word has length 105 [2022-11-19 07:34:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:14,618 INFO L495 AbstractCegarLoop]: Abstraction has 6647 states and 10852 transitions. [2022-11-19 07:34:14,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6647 states and 10852 transitions. [2022-11-19 07:34:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 07:34:14,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:14,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:14,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:34:14,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1066802886, now seen corresponding path program 1 times [2022-11-19 07:34:14,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:14,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83553361] [2022-11-19 07:34:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:14,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:34:14,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83553361] [2022-11-19 07:34:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83553361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:14,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:14,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:14,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147485760] [2022-11-19 07:34:14,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:14,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:14,881 INFO L87 Difference]: Start difference. First operand 6647 states and 10852 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:17,589 INFO L93 Difference]: Finished difference Result 19370 states and 33133 transitions. [2022-11-19 07:34:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-11-19 07:34:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:17,662 INFO L225 Difference]: With dead ends: 19370 [2022-11-19 07:34:17,663 INFO L226 Difference]: Without dead ends: 12748 [2022-11-19 07:34:17,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:17,704 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1143 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:17,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 751 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:34:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12748 states. [2022-11-19 07:34:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12748 to 12032. [2022-11-19 07:34:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12032 states, 8462 states have (on average 1.5613330181990073) internal successors, (13212), 8962 states have internal predecessors, (13212), 2730 states have call successors, (2730), 623 states have call predecessors, (2730), 839 states have return successors, (4188), 2581 states have call predecessors, (4188), 2725 states have call successors, (4188) [2022-11-19 07:34:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12032 states to 12032 states and 20130 transitions. [2022-11-19 07:34:19,048 INFO L78 Accepts]: Start accepts. Automaton has 12032 states and 20130 transitions. Word has length 106 [2022-11-19 07:34:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:19,049 INFO L495 AbstractCegarLoop]: Abstraction has 12032 states and 20130 transitions. [2022-11-19 07:34:19,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 12032 states and 20130 transitions. [2022-11-19 07:34:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:34:19,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:19,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:34:19,057 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1288575756, now seen corresponding path program 1 times [2022-11-19 07:34:19,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:19,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026713164] [2022-11-19 07:34:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:19,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:34:19,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026713164] [2022-11-19 07:34:19,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026713164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:19,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:19,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:19,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439148810] [2022-11-19 07:34:19,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:19,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:19,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:19,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:19,298 INFO L87 Difference]: Start difference. First operand 12032 states and 20130 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:22,751 INFO L93 Difference]: Finished difference Result 35899 states and 64844 transitions. [2022-11-19 07:34:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-11-19 07:34:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:23,027 INFO L225 Difference]: With dead ends: 35899 [2022-11-19 07:34:23,027 INFO L226 Difference]: Without dead ends: 23904 [2022-11-19 07:34:23,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:23,084 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1130 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:23,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 763 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:34:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23904 states. [2022-11-19 07:34:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23904 to 22669. [2022-11-19 07:34:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22669 states, 15921 states have (on average 1.5542993530557125) internal successors, (24746), 16957 states have internal predecessors, (24746), 5076 states have call successors, (5076), 1183 states have call predecessors, (5076), 1671 states have return successors, (9822), 4783 states have call predecessors, (9822), 5071 states have call successors, (9822) [2022-11-19 07:34:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22669 states to 22669 states and 39644 transitions. [2022-11-19 07:34:25,481 INFO L78 Accepts]: Start accepts. Automaton has 22669 states and 39644 transitions. Word has length 107 [2022-11-19 07:34:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:25,481 INFO L495 AbstractCegarLoop]: Abstraction has 22669 states and 39644 transitions. [2022-11-19 07:34:25,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22669 states and 39644 transitions. [2022-11-19 07:34:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:34:25,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:25,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:25,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:34:25,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1290873532, now seen corresponding path program 1 times [2022-11-19 07:34:25,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603043311] [2022-11-19 07:34:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:25,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:34:25,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:25,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603043311] [2022-11-19 07:34:25,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603043311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:25,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:25,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:25,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509970880] [2022-11-19 07:34:25,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:25,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:25,808 INFO L87 Difference]: Start difference. First operand 22669 states and 39644 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:31,026 INFO L93 Difference]: Finished difference Result 68745 states and 135984 transitions. [2022-11-19 07:34:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:31,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-11-19 07:34:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:31,398 INFO L225 Difference]: With dead ends: 68745 [2022-11-19 07:34:31,398 INFO L226 Difference]: Without dead ends: 46127 [2022-11-19 07:34:31,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:31,549 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:31,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 754 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:34:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46127 states. [2022-11-19 07:34:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46127 to 43534. [2022-11-19 07:34:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43534 states, 30614 states have (on average 1.5510550728424903) internal successors, (47484), 32658 states have internal predecessors, (47484), 9655 states have call successors, (9655), 2295 states have call predecessors, (9655), 3264 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-11-19 07:34:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43534 states to 43534 states and 80890 transitions. [2022-11-19 07:34:36,948 INFO L78 Accepts]: Start accepts. Automaton has 43534 states and 80890 transitions. Word has length 108 [2022-11-19 07:34:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:36,951 INFO L495 AbstractCegarLoop]: Abstraction has 43534 states and 80890 transitions. [2022-11-19 07:34:36,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:34:36,952 INFO L276 IsEmpty]: Start isEmpty. Operand 43534 states and 80890 transitions. [2022-11-19 07:34:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-19 07:34:36,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:36,967 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:36,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:34:36,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash -537917633, now seen corresponding path program 1 times [2022-11-19 07:34:36,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:36,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949293533] [2022-11-19 07:34:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:34:37,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:37,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949293533] [2022-11-19 07:34:37,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949293533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:37,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:37,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82250792] [2022-11-19 07:34:37,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:37,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:37,273 INFO L87 Difference]: Start difference. First operand 43534 states and 80890 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-19 07:34:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:42,111 INFO L93 Difference]: Finished difference Result 88668 states and 173312 transitions. [2022-11-19 07:34:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:34:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-11-19 07:34:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:42,347 INFO L225 Difference]: With dead ends: 88668 [2022-11-19 07:34:42,347 INFO L226 Difference]: Without dead ends: 45151 [2022-11-19 07:34:42,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:42,569 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 30 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:42,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1672 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45151 states. [2022-11-19 07:34:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45151 to 43732. [2022-11-19 07:34:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43732 states, 30812 states have (on average 1.5475139556017137) internal successors, (47682), 32856 states have internal predecessors, (47682), 9655 states have call successors, (9655), 2295 states have call predecessors, (9655), 3264 states have return successors, (23751), 9075 states have call predecessors, (23751), 9650 states have call successors, (23751) [2022-11-19 07:34:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43732 states to 43732 states and 81088 transitions. [2022-11-19 07:34:47,119 INFO L78 Accepts]: Start accepts. Automaton has 43732 states and 81088 transitions. Word has length 156 [2022-11-19 07:34:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:47,120 INFO L495 AbstractCegarLoop]: Abstraction has 43732 states and 81088 transitions. [2022-11-19 07:34:47,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-19 07:34:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43732 states and 81088 transitions. [2022-11-19 07:34:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:34:47,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:47,131 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:47,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:34:47,131 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2099501330, now seen corresponding path program 1 times [2022-11-19 07:34:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:47,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749001522] [2022-11-19 07:34:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:34:47,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749001522] [2022-11-19 07:34:47,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749001522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158939224] [2022-11-19 07:34:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:47,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:47,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:47,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:47,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96243c19-6778-4091-a533-9a519bf6a9ec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:34:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:47,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 2110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:34:47,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:34:48,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:48,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158939224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:48,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:48,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-19 07:34:48,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120649606] [2022-11-19 07:34:48,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:48,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:48,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:34:48,083 INFO L87 Difference]: Start difference. First operand 43732 states and 81088 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27)