./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:36:50,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:36:50,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:36:50,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:36:50,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:36:50,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:36:50,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:36:50,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:36:50,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:36:50,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:36:50,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:36:50,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:36:50,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:36:50,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:36:50,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:36:50,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:36:50,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:36:50,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:36:50,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:36:50,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:36:50,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:36:50,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:36:50,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:36:50,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:36:50,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:36:50,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:36:50,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:36:50,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:36:50,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:36:50,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:36:50,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:36:50,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:36:50,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:36:50,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:36:50,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:36:50,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:36:50,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:36:50,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:36:50,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:36:50,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:36:50,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:36:50,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:36:50,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:36:50,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:36:50,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:36:50,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:36:50,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:36:50,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:36:50,164 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:36:50,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:36:50,164 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:36:50,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:36:50,165 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:36:50,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:36:50,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:36:50,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:36:50,166 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:36:50,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:36:50,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:36:50,166 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:36:50,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:36:50,167 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:36:50,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:36:50,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:36:50,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:36:50,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:36:50,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:36:50,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:36:50,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:36:50,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:36:50,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:36:50,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:36:50,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:36:50,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:36:50,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:36:50,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:36:50,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:36:50,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:36:50,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:36:50,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:36:50,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:36:50,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:36:50,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:36:50,171 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_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2022-12-14 06:36:50,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:36:50,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:36:50,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:36:50,384 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:36:50,385 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:36:50,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2022-12-14 06:36:52,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:36:53,193 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:36:53,194 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2022-12-14 06:36:53,206 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/data/92a4e537f/1b7954e072504454841b249b409e6c86/FLAGb209e08d7 [2022-12-14 06:36:53,219 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/data/92a4e537f/1b7954e072504454841b249b409e6c86 [2022-12-14 06:36:53,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:36:53,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:36:53,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:36:53,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:36:53,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:36:53,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd3a9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53, skipping insertion in model container [2022-12-14 06:36:53,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:36:53,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:36:53,671 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2022-12-14 06:36:53,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:36:53,692 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:36:53,806 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2022-12-14 06:36:53,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:36:53,832 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:36:53,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53 WrapperNode [2022-12-14 06:36:53,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:36:53,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:36:53,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:36:53,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:36:53,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,888 INFO L138 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 861 [2022-12-14 06:36:53,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:36:53,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:36:53,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:36:53,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:36:53,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,924 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:36:53,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:36:53,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:36:53,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:36:53,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (1/1) ... [2022-12-14 06:36:53,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:36:53,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:36:53,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:36:53,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:36:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:36:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 06:36:53,998 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 06:36:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 06:36:53,998 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 06:36:53,998 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 06:36:53,999 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 06:36:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 06:36:53,999 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 06:36:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 06:36:53,999 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 06:36:53,999 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 06:36:53,999 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 06:36:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 06:36:54,000 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 06:36:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 06:36:54,000 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 06:36:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 06:36:54,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 06:36:54,000 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 06:36:54,001 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 06:36:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 06:36:54,001 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 06:36:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 06:36:54,001 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 06:36:54,001 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 06:36:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 06:36:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 06:36:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 06:36:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-12-14 06:36:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-12-14 06:36:54,002 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 06:36:54,002 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 06:36:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 06:36:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 06:36:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 06:36:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 06:36:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:36:54,003 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 06:36:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 06:36:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 06:36:54,004 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 06:36:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 06:36:54,004 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 06:36:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:36:54,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:36:54,004 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 06:36:54,005 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 06:36:54,120 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:36:54,122 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:36:54,937 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:36:55,387 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:36:55,388 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:36:55,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:36:55 BoogieIcfgContainer [2022-12-14 06:36:55,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:36:55,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:36:55,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:36:55,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:36:55,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:36:53" (1/3) ... [2022-12-14 06:36:55,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c27fcfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:36:55, skipping insertion in model container [2022-12-14 06:36:55,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:36:53" (2/3) ... [2022-12-14 06:36:55,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c27fcfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:36:55, skipping insertion in model container [2022-12-14 06:36:55,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:36:55" (3/3) ... [2022-12-14 06:36:55,397 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2022-12-14 06:36:55,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:36:55,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:36:55,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:36:55,465 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;@64ea8a98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:36:55,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:36:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-12-14 06:36:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 06:36:55,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:55,482 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] [2022-12-14 06:36:55,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1389027841, now seen corresponding path program 1 times [2022-12-14 06:36:55,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:55,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293389984] [2022-12-14 06:36:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:55,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:55,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:55,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293389984] [2022-12-14 06:36:55,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293389984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:55,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:55,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:36:55,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951412112] [2022-12-14 06:36:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:55,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:36:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:36:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:36:55,801 INFO L87 Difference]: Start difference. First operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:55,916 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2022-12-14 06:36:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:36:55,918 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-12-14 06:36:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:55,928 INFO L225 Difference]: With dead ends: 374 [2022-12-14 06:36:55,928 INFO L226 Difference]: Without dead ends: 352 [2022-12-14 06:36:55,931 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 [2022-12-14 06:36:55,933 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:55,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:36:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-12-14 06:36:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-12-14 06:36:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.606694560669456) internal successors, (384), 260 states have internal predecessors, (384), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2022-12-14 06:36:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2022-12-14 06:36:55,983 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2022-12-14 06:36:55,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:55,985 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2022-12-14 06:36:55,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 06:36:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2022-12-14 06:36:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 06:36:55,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:55,988 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] [2022-12-14 06:36:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:36:55,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 823513458, now seen corresponding path program 1 times [2022-12-14 06:36:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:55,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467250920] [2022-12-14 06:36:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:56,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:56,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467250920] [2022-12-14 06:36:56,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467250920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:56,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:56,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:36:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213506427] [2022-12-14 06:36:56,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:56,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:36:56,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:36:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:36:56,259 INFO L87 Difference]: Start difference. First operand 352 states and 561 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 06:36:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:57,739 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2022-12-14 06:36:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:36:57,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-12-14 06:36:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:57,744 INFO L225 Difference]: With dead ends: 1156 [2022-12-14 06:36:57,744 INFO L226 Difference]: Without dead ends: 820 [2022-12-14 06:36:57,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:36:57,748 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1162 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:57,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1064 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 06:36:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-12-14 06:36:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2022-12-14 06:36:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 521 states have (on average 1.6314779270633397) internal successors, (850), 551 states have internal predecessors, (850), 174 states have call successors, (174), 36 states have call predecessors, (174), 37 states have return successors, (176), 158 states have call predecessors, (176), 169 states have call successors, (176) [2022-12-14 06:36:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2022-12-14 06:36:57,811 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2022-12-14 06:36:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:57,811 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2022-12-14 06:36:57,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 06:36:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2022-12-14 06:36:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 06:36:57,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:57,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:57,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:36:57,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1202207761, now seen corresponding path program 1 times [2022-12-14 06:36:57,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:57,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782451354] [2022-12-14 06:36:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:57,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:36:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:36:58,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:36:58,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782451354] [2022-12-14 06:36:58,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782451354] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:36:58,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:36:58,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:36:58,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698103884] [2022-12-14 06:36:58,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:36:58,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:36:58,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:36:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:36:58,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:36:58,066 INFO L87 Difference]: Start difference. First operand 733 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 06:36:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:36:59,706 INFO L93 Difference]: Finished difference Result 2499 states and 4138 transitions. [2022-12-14 06:36:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:36:59,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-12-14 06:36:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:36:59,714 INFO L225 Difference]: With dead ends: 2499 [2022-12-14 06:36:59,715 INFO L226 Difference]: Without dead ends: 1783 [2022-12-14 06:36:59,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:36:59,718 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1639 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:36:59,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1702 Valid, 1717 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 06:36:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-12-14 06:36:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1696. [2022-12-14 06:36:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1233 states have (on average 1.64882400648824) internal successors, (2033), 1293 states have internal predecessors, (2033), 376 states have call successors, (376), 75 states have call predecessors, (376), 86 states have return successors, (403), 351 states have call predecessors, (403), 371 states have call successors, (403) [2022-12-14 06:36:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2812 transitions. [2022-12-14 06:36:59,798 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2812 transitions. Word has length 62 [2022-12-14 06:36:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:36:59,798 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2812 transitions. [2022-12-14 06:36:59,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 06:36:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2812 transitions. [2022-12-14 06:36:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 06:36:59,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:36:59,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:36:59,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:36:59,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:36:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:36:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1144376425, now seen corresponding path program 1 times [2022-12-14 06:36:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:36:59,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101660719] [2022-12-14 06:36:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:36:59,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:36:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:37:00,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:00,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101660719] [2022-12-14 06:37:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101660719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:00,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:00,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:37:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218887976] [2022-12-14 06:37:00,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:00,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:37:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:37:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:37:00,003 INFO L87 Difference]: Start difference. First operand 1696 states and 2812 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 06:37:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:02,210 INFO L93 Difference]: Finished difference Result 4670 states and 7758 transitions. [2022-12-14 06:37:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 06:37:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-12-14 06:37:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:02,223 INFO L225 Difference]: With dead ends: 4670 [2022-12-14 06:37:02,223 INFO L226 Difference]: Without dead ends: 2990 [2022-12-14 06:37:02,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-14 06:37:02,230 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 1276 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 4137 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 4775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 4137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:02,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 1998 Invalid, 4775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 4137 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 06:37:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2022-12-14 06:37:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2785. [2022-12-14 06:37:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 1992 states have (on average 1.6350401606425702) internal successors, (3257), 2095 states have internal predecessors, (3257), 657 states have call successors, (657), 111 states have call predecessors, (657), 135 states have return successors, (702), 623 states have call predecessors, (702), 652 states have call successors, (702) [2022-12-14 06:37:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4616 transitions. [2022-12-14 06:37:02,392 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4616 transitions. Word has length 65 [2022-12-14 06:37:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:02,392 INFO L495 AbstractCegarLoop]: Abstraction has 2785 states and 4616 transitions. [2022-12-14 06:37:02,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 06:37:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4616 transitions. [2022-12-14 06:37:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 06:37:02,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:02,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:37:02,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:02,395 INFO L85 PathProgramCache]: Analyzing trace with hash 536988671, now seen corresponding path program 1 times [2022-12-14 06:37:02,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:02,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328041752] [2022-12-14 06:37:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:02,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:37:02,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:02,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328041752] [2022-12-14 06:37:02,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328041752] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:02,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:02,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:37:02,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198078993] [2022-12-14 06:37:02,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:02,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:37:02,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:37:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:37:02,519 INFO L87 Difference]: Start difference. First operand 2785 states and 4616 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 06:37:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:02,777 INFO L93 Difference]: Finished difference Result 4934 states and 8192 transitions. [2022-12-14 06:37:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:37:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2022-12-14 06:37:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:02,788 INFO L225 Difference]: With dead ends: 4934 [2022-12-14 06:37:02,788 INFO L226 Difference]: Without dead ends: 2849 [2022-12-14 06:37:02,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:37:02,795 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:02,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2081 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:37:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2022-12-14 06:37:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2825. [2022-12-14 06:37:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2022 states have (on average 1.6256181998021761) internal successors, (3287), 2125 states have internal predecessors, (3287), 657 states have call successors, (657), 111 states have call predecessors, (657), 145 states have return successors, (722), 633 states have call predecessors, (722), 652 states have call successors, (722) [2022-12-14 06:37:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4666 transitions. [2022-12-14 06:37:02,935 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4666 transitions. Word has length 66 [2022-12-14 06:37:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:02,936 INFO L495 AbstractCegarLoop]: Abstraction has 2825 states and 4666 transitions. [2022-12-14 06:37:02,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 06:37:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4666 transitions. [2022-12-14 06:37:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 06:37:02,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:02,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:02,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:37:02,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1218707623, now seen corresponding path program 1 times [2022-12-14 06:37:02,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:02,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877902619] [2022-12-14 06:37:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:37:03,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:03,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877902619] [2022-12-14 06:37:03,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877902619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:03,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:03,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:37:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657753819] [2022-12-14 06:37:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:03,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:37:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:03,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:37:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:37:03,216 INFO L87 Difference]: Start difference. First operand 2825 states and 4666 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 06:37:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:04,998 INFO L93 Difference]: Finished difference Result 7035 states and 11638 transitions. [2022-12-14 06:37:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:37:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2022-12-14 06:37:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:05,016 INFO L225 Difference]: With dead ends: 7035 [2022-12-14 06:37:05,016 INFO L226 Difference]: Without dead ends: 4718 [2022-12-14 06:37:05,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:37:05,025 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 1887 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 3368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:05,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2035 Valid, 1418 Invalid, 3368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 06:37:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2022-12-14 06:37:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 4583. [2022-12-14 06:37:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 3211 states have (on average 1.582684521955777) internal successors, (5082), 3392 states have internal predecessors, (5082), 1113 states have call successors, (1113), 198 states have call predecessors, (1113), 258 states have return successors, (1249), 1070 states have call predecessors, (1249), 1108 states have call successors, (1249) [2022-12-14 06:37:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 7444 transitions. [2022-12-14 06:37:05,261 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 7444 transitions. Word has length 70 [2022-12-14 06:37:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:05,261 INFO L495 AbstractCegarLoop]: Abstraction has 4583 states and 7444 transitions. [2022-12-14 06:37:05,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 06:37:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 7444 transitions. [2022-12-14 06:37:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 06:37:05,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:05,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:05,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:37:05,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1860909680, now seen corresponding path program 1 times [2022-12-14 06:37:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:05,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139716956] [2022-12-14 06:37:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:37:05,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:05,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139716956] [2022-12-14 06:37:05,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139716956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:05,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:05,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:37:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369426932] [2022-12-14 06:37:05,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:37:05,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:37:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:37:05,506 INFO L87 Difference]: Start difference. First operand 4583 states and 7444 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 06:37:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:07,987 INFO L93 Difference]: Finished difference Result 9416 states and 15530 transitions. [2022-12-14 06:37:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 06:37:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2022-12-14 06:37:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:08,004 INFO L225 Difference]: With dead ends: 9416 [2022-12-14 06:37:08,004 INFO L226 Difference]: Without dead ends: 4801 [2022-12-14 06:37:08,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 06:37:08,018 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 2041 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 5564 mSolverCounterSat, 1155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2059 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 6719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1155 IncrementalHoareTripleChecker+Valid, 5564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:08,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2059 Valid, 3261 Invalid, 6719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1155 Valid, 5564 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 06:37:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2022-12-14 06:37:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 4619. [2022-12-14 06:37:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3236 states have (on average 1.5454264524103831) internal successors, (5001), 3417 states have internal predecessors, (5001), 1118 states have call successors, (1118), 204 states have call predecessors, (1118), 264 states have return successors, (1254), 1074 states have call predecessors, (1254), 1113 states have call successors, (1254) [2022-12-14 06:37:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 7373 transitions. [2022-12-14 06:37:08,324 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 7373 transitions. Word has length 73 [2022-12-14 06:37:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:08,324 INFO L495 AbstractCegarLoop]: Abstraction has 4619 states and 7373 transitions. [2022-12-14 06:37:08,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 06:37:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 7373 transitions. [2022-12-14 06:37:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 06:37:08,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:08,326 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:08,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:37:08,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash 244947855, now seen corresponding path program 1 times [2022-12-14 06:37:08,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:08,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323237743] [2022-12-14 06:37:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:08,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:37:08,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323237743] [2022-12-14 06:37:08,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323237743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:08,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:08,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:37:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144099969] [2022-12-14 06:37:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:08,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:37:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:37:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:37:08,534 INFO L87 Difference]: Start difference. First operand 4619 states and 7373 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 06:37:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:10,174 INFO L93 Difference]: Finished difference Result 9164 states and 14665 transitions. [2022-12-14 06:37:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:37:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-12-14 06:37:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:10,190 INFO L225 Difference]: With dead ends: 9164 [2022-12-14 06:37:10,190 INFO L226 Difference]: Without dead ends: 5167 [2022-12-14 06:37:10,200 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 [2022-12-14 06:37:10,201 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 924 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:10,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1585 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 06:37:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2022-12-14 06:37:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 4709. [2022-12-14 06:37:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3296 states have (on average 1.539745145631068) internal successors, (5075), 3491 states have internal predecessors, (5075), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2022-12-14 06:37:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 7487 transitions. [2022-12-14 06:37:10,466 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 7487 transitions. Word has length 75 [2022-12-14 06:37:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:10,467 INFO L495 AbstractCegarLoop]: Abstraction has 4709 states and 7487 transitions. [2022-12-14 06:37:10,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 06:37:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 7487 transitions. [2022-12-14 06:37:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 06:37:10,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:10,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:10,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:37:10,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -317172827, now seen corresponding path program 1 times [2022-12-14 06:37:10,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:10,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409696139] [2022-12-14 06:37:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:37:10,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:10,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409696139] [2022-12-14 06:37:10,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409696139] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:10,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:10,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:37:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550080303] [2022-12-14 06:37:10,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:10,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:37:10,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:37:10,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:10,605 INFO L87 Difference]: Start difference. First operand 4709 states and 7487 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 06:37:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:11,165 INFO L93 Difference]: Finished difference Result 4811 states and 7653 transitions. [2022-12-14 06:37:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:37:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 06:37:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:11,182 INFO L225 Difference]: With dead ends: 4811 [2022-12-14 06:37:11,182 INFO L226 Difference]: Without dead ends: 4796 [2022-12-14 06:37:11,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:37:11,185 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 615 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:11,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1704 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:37:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2022-12-14 06:37:11,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4715. [2022-12-14 06:37:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 3302 states have (on average 1.5387643852210782) internal successors, (5081), 3497 states have internal predecessors, (5081), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2022-12-14 06:37:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 7493 transitions. [2022-12-14 06:37:11,471 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 7493 transitions. Word has length 82 [2022-12-14 06:37:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:11,471 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 7493 transitions. [2022-12-14 06:37:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 06:37:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 7493 transitions. [2022-12-14 06:37:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 06:37:11,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:11,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:37:11,474 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1241690029, now seen corresponding path program 1 times [2022-12-14 06:37:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175787590] [2022-12-14 06:37:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:11,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:37:11,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:11,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175787590] [2022-12-14 06:37:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175787590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:11,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:11,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 06:37:11,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188950064] [2022-12-14 06:37:11,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:37:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:37:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:37:11,769 INFO L87 Difference]: Start difference. First operand 4715 states and 7493 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:37:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:15,423 INFO L93 Difference]: Finished difference Result 5291 states and 8387 transitions. [2022-12-14 06:37:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 06:37:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 84 [2022-12-14 06:37:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:15,440 INFO L225 Difference]: With dead ends: 5291 [2022-12-14 06:37:15,440 INFO L226 Difference]: Without dead ends: 5274 [2022-12-14 06:37:15,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 06:37:15,444 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 2567 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 7155 mSolverCounterSat, 1440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 3700 SdHoareTripleChecker+Invalid, 8595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1440 IncrementalHoareTripleChecker+Valid, 7155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:15,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2590 Valid, 3700 Invalid, 8595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1440 Valid, 7155 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 06:37:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5274 states. [2022-12-14 06:37:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5274 to 4997. [2022-12-14 06:37:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 3528 states have (on average 1.5470521541950113) internal successors, (5458), 3721 states have internal predecessors, (5458), 1139 states have call successors, (1139), 258 states have call predecessors, (1139), 329 states have return successors, (1315), 1094 states have call predecessors, (1315), 1134 states have call successors, (1315) [2022-12-14 06:37:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 7912 transitions. [2022-12-14 06:37:15,697 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 7912 transitions. Word has length 84 [2022-12-14 06:37:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:15,698 INFO L495 AbstractCegarLoop]: Abstraction has 4997 states and 7912 transitions. [2022-12-14 06:37:15,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:37:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 7912 transitions. [2022-12-14 06:37:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 06:37:15,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:15,699 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:15,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:37:15,700 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:15,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1709631128, now seen corresponding path program 1 times [2022-12-14 06:37:15,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:15,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186896597] [2022-12-14 06:37:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:37:15,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186896597] [2022-12-14 06:37:15,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186896597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:15,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:15,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:37:15,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915400478] [2022-12-14 06:37:15,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:15,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:37:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:37:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:37:15,835 INFO L87 Difference]: Start difference. First operand 4997 states and 7912 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:37:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:17,348 INFO L93 Difference]: Finished difference Result 13419 states and 21520 transitions. [2022-12-14 06:37:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:37:17,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 91 [2022-12-14 06:37:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:17,374 INFO L225 Difference]: With dead ends: 13419 [2022-12-14 06:37:17,374 INFO L226 Difference]: Without dead ends: 8442 [2022-12-14 06:37:17,388 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 [2022-12-14 06:37:17,388 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1089 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:17,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 696 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 06:37:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-12-14 06:37:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 7831. [2022-12-14 06:37:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7831 states, 5540 states have (on average 1.5431407942238267) internal successors, (8549), 5860 states have internal predecessors, (8549), 1766 states have call successors, (1766), 388 states have call predecessors, (1766), 524 states have return successors, (2124), 1687 states have call predecessors, (2124), 1761 states have call successors, (2124) [2022-12-14 06:37:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7831 states to 7831 states and 12439 transitions. [2022-12-14 06:37:17,796 INFO L78 Accepts]: Start accepts. Automaton has 7831 states and 12439 transitions. Word has length 91 [2022-12-14 06:37:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:17,796 INFO L495 AbstractCegarLoop]: Abstraction has 7831 states and 12439 transitions. [2022-12-14 06:37:17,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:37:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 7831 states and 12439 transitions. [2022-12-14 06:37:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 06:37:17,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:17,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:17,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:37:17,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1208589016, now seen corresponding path program 1 times [2022-12-14 06:37:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910265619] [2022-12-14 06:37:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:37:17,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:17,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910265619] [2022-12-14 06:37:17,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910265619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:17,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:17,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:37:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022677160] [2022-12-14 06:37:17,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:17,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:37:17,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:37:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:37:17,949 INFO L87 Difference]: Start difference. First operand 7831 states and 12439 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:37:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:19,621 INFO L93 Difference]: Finished difference Result 21727 states and 35133 transitions. [2022-12-14 06:37:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:37:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-12-14 06:37:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:19,673 INFO L225 Difference]: With dead ends: 21727 [2022-12-14 06:37:19,673 INFO L226 Difference]: Without dead ends: 13919 [2022-12-14 06:37:19,703 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 [2022-12-14 06:37:19,703 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1070 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:19,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 708 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:37:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13919 states. [2022-12-14 06:37:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13919 to 13187. [2022-12-14 06:37:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13187 states, 9351 states have (on average 1.5409047160731473) internal successors, (14409), 9949 states have internal predecessors, (14409), 2921 states have call successors, (2921), 648 states have call predecessors, (2921), 914 states have return successors, (3751), 2764 states have call predecessors, (3751), 2916 states have call successors, (3751) [2022-12-14 06:37:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13187 states to 13187 states and 21081 transitions. [2022-12-14 06:37:20,484 INFO L78 Accepts]: Start accepts. Automaton has 13187 states and 21081 transitions. Word has length 95 [2022-12-14 06:37:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:20,484 INFO L495 AbstractCegarLoop]: Abstraction has 13187 states and 21081 transitions. [2022-12-14 06:37:20,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 06:37:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 13187 states and 21081 transitions. [2022-12-14 06:37:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 06:37:20,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:20,486 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:37:20,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2021088742, now seen corresponding path program 1 times [2022-12-14 06:37:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:20,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799782328] [2022-12-14 06:37:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:37:20,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:20,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799782328] [2022-12-14 06:37:20,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799782328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:20,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:20,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:37:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774301823] [2022-12-14 06:37:20,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:20,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:37:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:37:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:37:20,631 INFO L87 Difference]: Start difference. First operand 13187 states and 21081 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, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:37:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:22,905 INFO L93 Difference]: Finished difference Result 37971 states and 62470 transitions. [2022-12-14 06:37:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:37:22,906 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, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 93 [2022-12-14 06:37:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:23,035 INFO L225 Difference]: With dead ends: 37971 [2022-12-14 06:37:23,035 INFO L226 Difference]: Without dead ends: 24813 [2022-12-14 06:37:23,069 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 [2022-12-14 06:37:23,069 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1063 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:23,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1127 Valid, 720 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:37:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24813 states. [2022-12-14 06:37:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24813 to 23790. [2022-12-14 06:37:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23790 states, 16878 states have (on average 1.536378717857566) internal successors, (25931), 18060 states have internal predecessors, (25931), 5189 states have call successors, (5189), 1168 states have call predecessors, (5189), 1722 states have return successors, (7407), 4876 states have call predecessors, (7407), 5184 states have call successors, (7407) [2022-12-14 06:37:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23790 states to 23790 states and 38527 transitions. [2022-12-14 06:37:24,706 INFO L78 Accepts]: Start accepts. Automaton has 23790 states and 38527 transitions. Word has length 93 [2022-12-14 06:37:24,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:24,706 INFO L495 AbstractCegarLoop]: Abstraction has 23790 states and 38527 transitions. [2022-12-14 06:37:24,706 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, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:37:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 23790 states and 38527 transitions. [2022-12-14 06:37:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 06:37:24,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:24,709 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:37:24,710 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1770637116, now seen corresponding path program 1 times [2022-12-14 06:37:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:24,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109887352] [2022-12-14 06:37:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:37:24,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109887352] [2022-12-14 06:37:24,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109887352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:24,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:24,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:37:24,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045340260] [2022-12-14 06:37:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:24,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:37:24,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:37:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:37:24,913 INFO L87 Difference]: Start difference. First operand 23790 states and 38527 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, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:37:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:28,861 INFO L93 Difference]: Finished difference Result 70144 states and 119121 transitions. [2022-12-14 06:37:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:37:28,862 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, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 94 [2022-12-14 06:37:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:29,025 INFO L225 Difference]: With dead ends: 70144 [2022-12-14 06:37:29,025 INFO L226 Difference]: Without dead ends: 46395 [2022-12-14 06:37:29,093 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 [2022-12-14 06:37:29,093 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1050 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:29,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 729 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:37:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46395 states. [2022-12-14 06:37:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46395 to 44741. [2022-12-14 06:37:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44741 states, 31717 states have (on average 1.5300627423779045) internal successors, (48529), 34123 states have internal predecessors, (48529), 9629 states have call successors, (9629), 2208 states have call predecessors, (9629), 3394 states have return successors, (16099), 9004 states have call predecessors, (16099), 9624 states have call successors, (16099) [2022-12-14 06:37:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44741 states to 44741 states and 74257 transitions. [2022-12-14 06:37:32,408 INFO L78 Accepts]: Start accepts. Automaton has 44741 states and 74257 transitions. Word has length 94 [2022-12-14 06:37:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:32,408 INFO L495 AbstractCegarLoop]: Abstraction has 44741 states and 74257 transitions. [2022-12-14 06:37:32,408 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, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:37:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44741 states and 74257 transitions. [2022-12-14 06:37:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 06:37:32,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:32,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:37:32,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash -488755794, now seen corresponding path program 1 times [2022-12-14 06:37:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:32,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273327549] [2022-12-14 06:37:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:37:32,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273327549] [2022-12-14 06:37:32,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273327549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:32,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:32,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:37:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900936002] [2022-12-14 06:37:32,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:32,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:37:32,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:32,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:37:32,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:37:32,968 INFO L87 Difference]: Start difference. First operand 44741 states and 74257 transitions. Second operand has 11 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 06:37:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:38,337 INFO L93 Difference]: Finished difference Result 52163 states and 97075 transitions. [2022-12-14 06:37:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:37:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2022-12-14 06:37:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:38,570 INFO L225 Difference]: With dead ends: 52163 [2022-12-14 06:37:38,570 INFO L226 Difference]: Without dead ends: 50241 [2022-12-14 06:37:38,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:37:38,616 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 2029 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 4044 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 4913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 4044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:38,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2094 Valid, 2190 Invalid, 4913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 4044 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 06:37:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50241 states. [2022-12-14 06:37:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50241 to 48308. [2022-12-14 06:37:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48308 states, 34255 states have (on average 1.5252955772879873) internal successors, (52249), 36861 states have internal predecessors, (52249), 10152 states have call successors, (10152), 2514 states have call predecessors, (10152), 3900 states have return successors, (17352), 9527 states have call predecessors, (17352), 10147 states have call successors, (17352) [2022-12-14 06:37:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48308 states to 48308 states and 79753 transitions. [2022-12-14 06:37:42,702 INFO L78 Accepts]: Start accepts. Automaton has 48308 states and 79753 transitions. Word has length 98 [2022-12-14 06:37:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:42,703 INFO L495 AbstractCegarLoop]: Abstraction has 48308 states and 79753 transitions. [2022-12-14 06:37:42,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 06:37:42,703 INFO L276 IsEmpty]: Start isEmpty. Operand 48308 states and 79753 transitions. [2022-12-14 06:37:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 06:37:42,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:42,706 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:42,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:37:42,706 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:42,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1025642198, now seen corresponding path program 1 times [2022-12-14 06:37:42,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:42,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909393707] [2022-12-14 06:37:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:42,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:37:42,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:42,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909393707] [2022-12-14 06:37:42,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909393707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:42,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:42,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:37:42,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550272839] [2022-12-14 06:37:42,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:42,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:37:42,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:37:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:37:42,833 INFO L87 Difference]: Start difference. First operand 48308 states and 79753 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:37:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:51,433 INFO L93 Difference]: Finished difference Result 150588 states and 253835 transitions. [2022-12-14 06:37:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:37:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2022-12-14 06:37:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:51,822 INFO L225 Difference]: With dead ends: 150588 [2022-12-14 06:37:51,823 INFO L226 Difference]: Without dead ends: 102354 [2022-12-14 06:37:51,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:37:51,964 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1227 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:51,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 1038 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 06:37:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102354 states. [2022-12-14 06:37:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102354 to 99570. [2022-12-14 06:37:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99570 states, 71192 states have (on average 1.523696482750871) internal successors, (108475), 76426 states have internal predecessors, (108475), 20344 states have call successors, (20344), 5266 states have call predecessors, (20344), 8033 states have return successors, (36562), 19032 states have call predecessors, (36562), 20339 states have call successors, (36562) [2022-12-14 06:38:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99570 states to 99570 states and 165381 transitions. [2022-12-14 06:38:00,063 INFO L78 Accepts]: Start accepts. Automaton has 99570 states and 165381 transitions. Word has length 96 [2022-12-14 06:38:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:00,064 INFO L495 AbstractCegarLoop]: Abstraction has 99570 states and 165381 transitions. [2022-12-14 06:38:00,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 06:38:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 99570 states and 165381 transitions. [2022-12-14 06:38:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 06:38:00,066 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:00,066 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 06:38:00,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 06:38:00,066 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:00,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:00,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1118489583, now seen corresponding path program 1 times [2022-12-14 06:38:00,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:00,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319282964] [2022-12-14 06:38:00,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:00,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:38:00,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:00,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319282964] [2022-12-14 06:38:00,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319282964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:38:00,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:38:00,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:38:00,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407797153] [2022-12-14 06:38:00,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:38:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:38:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:38:00,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:38:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:38:00,197 INFO L87 Difference]: Start difference. First operand 99570 states and 165381 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 06:38:16,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:38:16,822 INFO L93 Difference]: Finished difference Result 299752 states and 539138 transitions. [2022-12-14 06:38:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:38:16,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 104 [2022-12-14 06:38:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:38:17,806 INFO L225 Difference]: With dead ends: 299752 [2022-12-14 06:38:17,806 INFO L226 Difference]: Without dead ends: 200240 [2022-12-14 06:38:18,154 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 [2022-12-14 06:38:18,154 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 1050 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:38:18,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 723 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:38:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200240 states. [2022-12-14 06:38:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200240 to 193568. [2022-12-14 06:38:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193568 states, 138517 states have (on average 1.5208313780979952) internal successors, (210661), 148901 states have internal predecessors, (210661), 39224 states have call successors, (39224), 10348 states have call predecessors, (39224), 15826 states have return successors, (82627), 36608 states have call predecessors, (82627), 39219 states have call successors, (82627) [2022-12-14 06:38:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193568 states to 193568 states and 332512 transitions. [2022-12-14 06:38:35,582 INFO L78 Accepts]: Start accepts. Automaton has 193568 states and 332512 transitions. Word has length 104 [2022-12-14 06:38:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:35,583 INFO L495 AbstractCegarLoop]: Abstraction has 193568 states and 332512 transitions. [2022-12-14 06:38:35,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-12-14 06:38:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 193568 states and 332512 transitions. [2022-12-14 06:38:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 06:38:35,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:35,589 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:38:35,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 06:38:35,589 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:35,590 INFO L85 PathProgramCache]: Analyzing trace with hash -241502126, now seen corresponding path program 1 times [2022-12-14 06:38:35,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:35,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878608751] [2022-12-14 06:38:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:35,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 06:38:36,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:36,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878608751] [2022-12-14 06:38:36,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878608751] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:38:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318688896] [2022-12-14 06:38:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:36,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:38:36,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:38:36,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:38:36,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:38:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:38:36,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:38:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:38:36,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:38:36,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318688896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:38:36,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:38:36,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-14 06:38:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703254942] [2022-12-14 06:38:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:38:36,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:38:36,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:38:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:38:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:38:36,431 INFO L87 Difference]: Start difference. First operand 193568 states and 332512 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:38:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:38:53,124 INFO L93 Difference]: Finished difference Result 399794 states and 711663 transitions. [2022-12-14 06:38:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:38:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2022-12-14 06:38:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:38:54,081 INFO L225 Difference]: With dead ends: 399794 [2022-12-14 06:38:54,081 INFO L226 Difference]: Without dead ends: 206243 [2022-12-14 06:38:54,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:38:54,755 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 213 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:38:54,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1329 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:38:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206243 states. [2022-12-14 06:39:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206243 to 206243. [2022-12-14 06:39:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206243 states, 150867 states have (on average 1.5535935625418416) internal successors, (234386), 161251 states have internal predecessors, (234386), 39224 states have call successors, (39224), 10673 states have call predecessors, (39224), 16151 states have return successors, (82627), 36608 states have call predecessors, (82627), 39219 states have call successors, (82627) [2022-12-14 06:39:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206243 states to 206243 states and 356237 transitions. [2022-12-14 06:39:12,367 INFO L78 Accepts]: Start accepts. Automaton has 206243 states and 356237 transitions. Word has length 141 [2022-12-14 06:39:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:12,367 INFO L495 AbstractCegarLoop]: Abstraction has 206243 states and 356237 transitions. [2022-12-14 06:39:12,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:39:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 206243 states and 356237 transitions. [2022-12-14 06:39:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 06:39:12,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:12,374 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:12,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:39:12,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:39:12,575 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:39:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1897393857, now seen corresponding path program 1 times [2022-12-14 06:39:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:12,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879479208] [2022-12-14 06:39:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:39:12,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:12,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879479208] [2022-12-14 06:39:12,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879479208] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:39:12,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672693439] [2022-12-14 06:39:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:12,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:39:12,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:39:12,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:39:12,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:39:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:12,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:39:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:39:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 06:39:13,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:39:13,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672693439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:13,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:39:13,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 06:39:13,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416255628] [2022-12-14 06:39:13,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:13,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:39:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:39:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:39:13,009 INFO L87 Difference]: Start difference. First operand 206243 states and 356237 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:39:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:29,891 INFO L93 Difference]: Finished difference Result 425144 states and 758210 transitions. [2022-12-14 06:39:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:39:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-12-14 06:39:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:30,987 INFO L225 Difference]: With dead ends: 425144 [2022-12-14 06:39:30,987 INFO L226 Difference]: Without dead ends: 218918 [2022-12-14 06:39:31,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:39:31,637 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 211 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:31,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1329 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218918 states. [2022-12-14 06:39:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218918 to 218918. [2022-12-14 06:39:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218918 states, 163217 states have (on average 1.581397771065514) internal successors, (258111), 173601 states have internal predecessors, (258111), 39224 states have call successors, (39224), 10998 states have call predecessors, (39224), 16476 states have return successors, (82627), 36608 states have call predecessors, (82627), 39219 states have call successors, (82627) [2022-12-14 06:39:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218918 states to 218918 states and 379962 transitions. [2022-12-14 06:39:49,831 INFO L78 Accepts]: Start accepts. Automaton has 218918 states and 379962 transitions. Word has length 146 [2022-12-14 06:39:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:49,832 INFO L495 AbstractCegarLoop]: Abstraction has 218918 states and 379962 transitions. [2022-12-14 06:39:49,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:39:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 218918 states and 379962 transitions. [2022-12-14 06:39:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 06:39:49,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:49,839 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:49,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:39:50,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:39:50,040 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:39:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1310993871, now seen corresponding path program 1 times [2022-12-14 06:39:50,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:50,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749681111] [2022-12-14 06:39:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:50,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 06:39:50,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749681111] [2022-12-14 06:39:50,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749681111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:39:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680150117] [2022-12-14 06:39:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:50,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:39:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:39:50,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:39:50,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:39:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:39:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:39:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:39:50,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:39:50,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680150117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:50,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:39:50,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 06:39:50,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630452433] [2022-12-14 06:39:50,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:50,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:39:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:50,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:39:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:39:50,573 INFO L87 Difference]: Start difference. First operand 218918 states and 379962 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:40:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:07,181 INFO L93 Difference]: Finished difference Result 450494 states and 804757 transitions. [2022-12-14 06:40:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:40:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 150 [2022-12-14 06:40:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:08,450 INFO L225 Difference]: With dead ends: 450494 [2022-12-14 06:40:08,451 INFO L226 Difference]: Without dead ends: 231593 [2022-12-14 06:40:09,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:40:09,246 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 209 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:09,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1329 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:40:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231593 states. [2022-12-14 06:40:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231593 to 231593. [2022-12-14 06:40:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231593 states, 175567 states have (on average 1.6052902880381847) internal successors, (281836), 185951 states have internal predecessors, (281836), 39224 states have call successors, (39224), 11323 states have call predecessors, (39224), 16801 states have return successors, (82627), 36608 states have call predecessors, (82627), 39219 states have call successors, (82627) [2022-12-14 06:40:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231593 states to 231593 states and 403687 transitions. [2022-12-14 06:40:27,048 INFO L78 Accepts]: Start accepts. Automaton has 231593 states and 403687 transitions. Word has length 150 [2022-12-14 06:40:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:27,048 INFO L495 AbstractCegarLoop]: Abstraction has 231593 states and 403687 transitions. [2022-12-14 06:40:27,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:40:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 231593 states and 403687 transitions. [2022-12-14 06:40:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 06:40:27,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:27,055 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2022-12-14 06:40:27,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:40:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:40:27,256 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:40:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1885021576, now seen corresponding path program 1 times [2022-12-14 06:40:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:27,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988641734] [2022-12-14 06:40:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:27,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 06:40:27,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988641734] [2022-12-14 06:40:27,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988641734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:40:27,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087060857] [2022-12-14 06:40:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:27,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:40:27,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:40:27,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:40:27,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:40:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:40:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:40:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 06:40:27,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:40:27,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087060857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:27,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:40:27,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 06:40:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323298935] [2022-12-14 06:40:27,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:40:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:40:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:40:27,725 INFO L87 Difference]: Start difference. First operand 231593 states and 403687 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:40:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:45,430 INFO L93 Difference]: Finished difference Result 475844 states and 851304 transitions. [2022-12-14 06:40:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:40:45,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 153 [2022-12-14 06:40:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:46,440 INFO L225 Difference]: With dead ends: 475844 [2022-12-14 06:40:46,440 INFO L226 Difference]: Without dead ends: 244268 [2022-12-14 06:40:47,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:40:47,131 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 207 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:47,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1329 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:40:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244268 states. [2022-12-14 06:41:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244268 to 244268. [2022-12-14 06:41:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244268 states, 187917 states have (on average 1.626042348483639) internal successors, (305561), 198301 states have internal predecessors, (305561), 39224 states have call successors, (39224), 11648 states have call predecessors, (39224), 17126 states have return successors, (82627), 36608 states have call predecessors, (82627), 39219 states have call successors, (82627) [2022-12-14 06:41:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244268 states to 244268 states and 427412 transitions. [2022-12-14 06:41:06,376 INFO L78 Accepts]: Start accepts. Automaton has 244268 states and 427412 transitions. Word has length 153 [2022-12-14 06:41:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:06,377 INFO L495 AbstractCegarLoop]: Abstraction has 244268 states and 427412 transitions. [2022-12-14 06:41:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 06:41:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 244268 states and 427412 transitions. [2022-12-14 06:41:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 06:41:06,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:06,384 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:41:06,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:41:06,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 06:41:06,585 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:41:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2116161174, now seen corresponding path program 1 times [2022-12-14 06:41:06,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:06,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807247519] [2022-12-14 06:41:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:06,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 06:41:06,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807247519] [2022-12-14 06:41:06,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807247519] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:41:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663198583] [2022-12-14 06:41:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:41:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:41:06,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:41:06,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:41:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2071 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:41:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:41:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 06:41:07,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:41:07,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663198583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:07,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:41:07,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 06:41:07,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327182714] [2022-12-14 06:41:07,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:07,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:41:07,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:41:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:41:07,154 INFO L87 Difference]: Start difference. First operand 244268 states and 427412 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 06:41:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:22,556 INFO L93 Difference]: Finished difference Result 247922 states and 449538 transitions. [2022-12-14 06:41:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:41:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 155 [2022-12-14 06:41:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:23,752 INFO L225 Difference]: With dead ends: 247922 [2022-12-14 06:41:23,752 INFO L226 Difference]: Without dead ends: 247765 [2022-12-14 06:41:23,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:41:23,876 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 47 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:23,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1605 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:41:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247765 states. [2022-12-14 06:41:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247765 to 244640. [2022-12-14 06:41:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244640 states, 188289 states have (on average 1.6238176420290087) internal successors, (305747), 198673 states have internal predecessors, (305747), 39224 states have call successors, (39224), 11648 states have call predecessors, (39224), 17126 states have return successors, (82627), 36608 states have call predecessors, (82627), 39219 states have call successors, (82627) [2022-12-14 06:41:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244640 states to 244640 states and 427598 transitions. [2022-12-14 06:41:43,931 INFO L78 Accepts]: Start accepts. Automaton has 244640 states and 427598 transitions. Word has length 155 [2022-12-14 06:41:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:43,931 INFO L495 AbstractCegarLoop]: Abstraction has 244640 states and 427598 transitions. [2022-12-14 06:41:43,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-12-14 06:41:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 244640 states and 427598 transitions. [2022-12-14 06:41:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-12-14 06:41:43,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:43,940 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:41:43,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:41:44,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 06:41:44,142 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:41:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash -315334522, now seen corresponding path program 1 times [2022-12-14 06:41:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:44,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582685083] [2022-12-14 06:41:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:44,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-12-14 06:41:44,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582685083] [2022-12-14 06:41:44,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582685083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:41:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404382592] [2022-12-14 06:41:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:44,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:41:44,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:41:44,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:41:44,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:41:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:44,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 2799 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:41:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:41:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-12-14 06:41:45,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:41:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-12-14 06:41:45,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404382592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:41:45,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [874453] [2022-12-14 06:41:45,396 INFO L159 IcfgInterpreter]: Started Sifa with 123 locations of interest [2022-12-14 06:41:45,396 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:41:45,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:41:45,402 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:41:45,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:41:54,240 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 428 for LOIs [2022-12-14 06:41:54,303 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 596 for LOIs [2022-12-14 06:43:18,785 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 721 for LOIs [2022-12-14 06:43:23,556 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 463 for LOIs [2022-12-14 06:43:23,697 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-12-14 06:43:27,312 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 591 for LOIs [2022-12-14 06:43:27,967 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 428 for LOIs [2022-12-14 06:43:28,096 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 519 for LOIs [2022-12-14 06:43:28,238 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__empty with input of size 194 for LOIs [2022-12-14 06:43:31,571 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 62 for LOIs [2022-12-14 06:43:31,585 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 69 for LOIs [2022-12-14 06:43:31,741 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 63 for LOIs [2022-12-14 06:43:31,907 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 49 for LOIs [2022-12-14 06:43:31,918 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 45 for LOIs [2022-12-14 06:43:31,929 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 75 for LOIs [2022-12-14 06:43:31,951 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 154 for LOIs [2022-12-14 06:43:32,911 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 64 for LOIs [2022-12-14 06:43:32,926 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:44:59,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5791597#(and (not (= ~currentFloorID~0 0)) (= (select (select |#memory_int| 23) 0) 32) (= (select |#length| 32) 30) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= (select |#length| 37) 25) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= 9 (select |#length| 30)) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= 25 (select |#length| 34)) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (not (= ~currentFloorID~0 1)) (= (select |#valid| 27) 1) (= 9 (select |#length| 36)) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= (select (select |#memory_int| 19) 2) 105) (not (= ~currentFloorID~0 4)) (= 9 (select |#length| 25)) (= (select |#length| 15) 4) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select (select |#memory_int| 18) 4) 58) (= (select |#valid| 18) 1) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 30 (select |#length| 26)) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (not (= 0 ~floorButtons_spc2_0~0)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 24) 2) (= ~doorState~0 1) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 112 (select (select |#memory_int| 18) 3)) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (not (= ~currentFloorID~0 2)) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select |#length| 33) 9) (= (select |#length| 27) 9) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 7) 3)) (= 30 (select |#length| 35)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= 21 (select |#length| 31)) (not (= ~currentFloorID~0 3)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 5) 2) 93) (= (select |#length| 28) 21) (= (select (select |#memory_int| 14) 0) 32) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= 30 (select |#length| 29)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-12-14 06:44:59,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:44:59,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:44:59,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2022-12-14 06:44:59,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657417432] [2022-12-14 06:44:59,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:44:59,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:44:59,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:44:59,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:44:59,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=13061, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 06:44:59,966 INFO L87 Difference]: Start difference. First operand 244640 states and 427598 transitions. Second operand has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 10 states have call successors, (65), 4 states have call predecessors, (65), 6 states have return successors, (64), 10 states have call predecessors, (64), 9 states have call successors, (64) [2022-12-14 06:45:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:30,105 INFO L93 Difference]: Finished difference Result 586829 states and 1223984 transitions. [2022-12-14 06:45:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 06:45:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 10 states have call successors, (65), 4 states have call predecessors, (65), 6 states have return successors, (64), 10 states have call predecessors, (64), 9 states have call successors, (64) Word has length 256 [2022-12-14 06:45:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:32,328 INFO L225 Difference]: With dead ends: 586829 [2022-12-14 06:45:32,328 INFO L226 Difference]: Without dead ends: 331611 [2022-12-14 06:45:33,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 660 SyntacticMatches, 14 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8271 ImplicationChecksByTransitivity, 89.2s TimeCoverageRelationStatistics Valid=1056, Invalid=19536, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 06:45:33,584 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 3410 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 7831 mSolverCounterSat, 1874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 9705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1874 IncrementalHoareTripleChecker+Valid, 7831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:33,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3422 Valid, 3058 Invalid, 9705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1874 Valid, 7831 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 06:45:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331611 states. [2022-12-14 06:46:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331611 to 312441. [2022-12-14 06:46:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312441 states, 241195 states have (on average 1.5931797922842514) internal successors, (384267), 254768 states have internal predecessors, (384267), 50619 states have call successors, (50619), 13348 states have call predecessors, (50619), 20626 states have return successors, (159527), 46644 states have call predecessors, (159527), 50614 states have call successors, (159527) [2022-12-14 06:46:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312441 states to 312441 states and 594413 transitions. [2022-12-14 06:46:02,641 INFO L78 Accepts]: Start accepts. Automaton has 312441 states and 594413 transitions. Word has length 256 [2022-12-14 06:46:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:02,641 INFO L495 AbstractCegarLoop]: Abstraction has 312441 states and 594413 transitions. [2022-12-14 06:46:02,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 10 states have call successors, (65), 4 states have call predecessors, (65), 6 states have return successors, (64), 10 states have call predecessors, (64), 9 states have call successors, (64) [2022-12-14 06:46:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 312441 states and 594413 transitions. [2022-12-14 06:46:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 06:46:02,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:02,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:46:02,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 06:46:02,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eceaf94-6f1e-4482-8a91-4c56dbfde60a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 06:46:02,872 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1962690318, now seen corresponding path program 1 times [2022-12-14 06:46:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683661206] [2022-12-14 06:46:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 06:46:03,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683661206] [2022-12-14 06:46:03,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683661206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:46:03,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:46:03,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:46:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331369430] [2022-12-14 06:46:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:46:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:46:03,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:46:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:46:03,023 INFO L87 Difference]: Start difference. First operand 312441 states and 594413 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2022-12-14 06:46:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:27,887 INFO L93 Difference]: Finished difference Result 648528 states and 1286142 transitions. [2022-12-14 06:46:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:46:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) Word has length 178 [2022-12-14 06:46:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:30,228 INFO L225 Difference]: With dead ends: 648528 [2022-12-14 06:46:30,228 INFO L226 Difference]: Without dead ends: 329926 [2022-12-14 06:46:32,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:46:32,343 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 99 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:32,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1342 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:46:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329926 states.