./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF --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 aaf13b6417c3a40bd252c0d41a10a8dacb34259e9c2292b8e82d477fe2508ef5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:35:20,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:35:20,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:35:20,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:35:20,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:35:20,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:35:20,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:35:20,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:35:20,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:35:20,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:35:20,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:35:20,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:35:20,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:35:20,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:35:20,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:35:20,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:35:20,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:35:20,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:35:20,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:35:20,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:35:20,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:35:20,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:35:20,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:35:20,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:35:20,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:35:20,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:35:20,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:35:20,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:35:20,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:35:20,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:35:20,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:35:20,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:35:20,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:35:20,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:35:20,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:35:20,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:35:20,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:35:20,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:35:20,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:35:20,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:35:20,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:35:20,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:35:20,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:35:20,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:35:20,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:35:20,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:35:20,213 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:35:20,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:35:20,213 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:35:20,214 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:35:20,214 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:35:20,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:35:20,222 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:35:20,223 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:35:20,223 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:35:20,223 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:35:20,224 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:35:20,224 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:35:20,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:35:20,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:35:20,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:35:20,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:35:20,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:35:20,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:35:20,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:35:20,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:35:20,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:35:20,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:35:20,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:35:20,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:35:20,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:35:20,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:35:20,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:35:20,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:35:20,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:35:20,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:35:20,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:35:20,232 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:35:20,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:35:20,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:35:20,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:35:20,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:35:20,233 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aaf13b6417c3a40bd252c0d41a10a8dacb34259e9c2292b8e82d477fe2508ef5 [2021-11-12 23:35:20,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:35:20,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:35:20,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:35:20,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:35:20,612 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:35:20,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c [2021-11-12 23:35:20,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/data/3bf3a428e/a6406e84dbc540efb4fe3ef7028732bf/FLAGb03174de9 [2021-11-12 23:35:21,830 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:35:21,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c [2021-11-12 23:35:21,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/data/3bf3a428e/a6406e84dbc540efb4fe3ef7028732bf/FLAGb03174de9 [2021-11-12 23:35:22,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/data/3bf3a428e/a6406e84dbc540efb4fe3ef7028732bf [2021-11-12 23:35:22,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:35:22,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:35:22,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:35:22,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:35:22,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:35:22,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:35:22" (1/1) ... [2021-11-12 23:35:22,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388f4a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:22, skipping insertion in model container [2021-11-12 23:35:22,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:35:22" (1/1) ... [2021-11-12 23:35:22,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:35:22,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:35:25,299 WARN L228 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_3cac6911-6368-42eb-817f-bd3e767c76cf/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[380593,380606] [2021-11-12 23:35:25,330 WARN L228 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_3cac6911-6368-42eb-817f-bd3e767c76cf/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[383339,383352] [2021-11-12 23:35:25,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:35:25,776 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:35:27,354 WARN L228 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_3cac6911-6368-42eb-817f-bd3e767c76cf/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[380593,380606] [2021-11-12 23:35:27,361 WARN L228 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_3cac6911-6368-42eb-817f-bd3e767c76cf/sv-benchmarks/c/combinations/Problem05_label49+token_ring.08.cil-2.c[383339,383352] [2021-11-12 23:35:27,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:35:27,487 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:35:27,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27 WrapperNode [2021-11-12 23:35:27,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:35:27,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:35:27,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:35:27,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:35:27,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:27,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:35:28,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:35:28,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:35:28,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:35:28,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:35:28,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:35:28,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:35:28,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:35:28,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (1/1) ... [2021-11-12 23:35:28,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:35:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:28,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:35:28,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:35:28,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:35:28,842 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:35:28,842 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:35:28,842 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:35:28,842 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:35:28,843 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:35:28,843 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:35:28,843 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-12 23:35:28,843 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-12 23:35:28,843 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:35:28,844 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:35:28,844 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:35:28,844 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:35:28,844 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:35:28,844 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:35:28,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:35:28,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:35:28,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:35:41,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:35:41,008 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-12 23:35:41,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:35:41 BoogieIcfgContainer [2021-11-12 23:35:41,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:35:41,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:35:41,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:35:41,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:35:41,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:35:22" (1/3) ... [2021-11-12 23:35:41,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244a3c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:35:41, skipping insertion in model container [2021-11-12 23:35:41,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:27" (2/3) ... [2021-11-12 23:35:41,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244a3c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:35:41, skipping insertion in model container [2021-11-12 23:35:41,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:35:41" (3/3) ... [2021-11-12 23:35:41,024 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.08.cil-2.c [2021-11-12 23:35:41,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:35:41,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:35:41,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:35:41,106 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:35:41,106 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:35:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-12 23:35:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:35:41,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:41,181 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:35:41,182 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2118186605, now seen corresponding path program 1 times [2021-11-12 23:35:41,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:41,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711520423] [2021-11-12 23:35:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:41,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:35:41,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:41,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711520423] [2021-11-12 23:35:41,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711520423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:41,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:41,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:35:41,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471369725] [2021-11-12 23:35:41,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:41,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:41,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:35:41,712 INFO L87 Difference]: Start difference. First operand has 1793 states, 1759 states have (on average 1.9641841955656623) internal successors, (3455), 1764 states have internal predecessors, (3455), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:35:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:42,800 INFO L93 Difference]: Finished difference Result 3712 states and 7223 transitions. [2021-11-12 23:35:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:42,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-11-12 23:35:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:42,833 INFO L225 Difference]: With dead ends: 3712 [2021-11-12 23:35:42,833 INFO L226 Difference]: Without dead ends: 1918 [2021-11-12 23:35:42,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:35:42,850 INFO L933 BasicCegarLoop]: 3398 mSDtfsCounter, 3655 mSDsluCounter, 3599 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 638.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3655 SdHoareTripleChecker+Valid, 6712 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.59ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 799.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:42,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3655 Valid, 6712 Invalid, 680 Unknown, 0 Unchecked, 44.59ms Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 799.32ms Time] [2021-11-12 23:35:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-12 23:35:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1917. [2021-11-12 23:35:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1861 states have (on average 1.9333691563675444) internal successors, (3598), 1865 states have internal predecessors, (3598), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-12 23:35:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 3680 transitions. [2021-11-12 23:35:43,041 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 3680 transitions. Word has length 56 [2021-11-12 23:35:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:43,042 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 3680 transitions. [2021-11-12 23:35:43,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:35:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 3680 transitions. [2021-11-12 23:35:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:35:43,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:43,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:43,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:35:43,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:43,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1355946959, now seen corresponding path program 1 times [2021-11-12 23:35:43,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:43,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355458691] [2021-11-12 23:35:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:43,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:43,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:43,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355458691] [2021-11-12 23:35:43,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355458691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:43,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787722772] [2021-11-12 23:35:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:43,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:43,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:43,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:35:43,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:35:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:35:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:35:44,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:35:44,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787722772] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:44,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:35:44,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:35:44,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289273124] [2021-11-12 23:35:44,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:44,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:44,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:44,379 INFO L87 Difference]: Start difference. First operand 1917 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:44,978 INFO L93 Difference]: Finished difference Result 2452 states and 4499 transitions. [2021-11-12 23:35:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:44,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-11-12 23:35:44,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:45,004 INFO L225 Difference]: With dead ends: 2452 [2021-11-12 23:35:45,004 INFO L226 Difference]: Without dead ends: 2181 [2021-11-12 23:35:45,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:45,010 INFO L933 BasicCegarLoop]: 3289 mSDtfsCounter, 3455 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 376.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.23ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 447.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:45,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3455 Valid, 3461 Invalid, 297 Unknown, 0 Unchecked, 19.23ms Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 447.02ms Time] [2021-11-12 23:35:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-11-12 23:35:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2175. [2021-11-12 23:35:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2073 states have (on average 1.8876025084418717) internal successors, (3913), 2078 states have internal predecessors, (3913), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2021-11-12 23:35:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 4063 transitions. [2021-11-12 23:35:45,244 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 4063 transitions. Word has length 109 [2021-11-12 23:35:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:45,244 INFO L470 AbstractCegarLoop]: Abstraction has 2175 states and 4063 transitions. [2021-11-12 23:35:45,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 4063 transitions. [2021-11-12 23:35:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:35:45,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:45,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:45,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:45,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:45,463 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2062193297, now seen corresponding path program 1 times [2021-11-12 23:35:45,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:45,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281998036] [2021-11-12 23:35:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:45,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:45,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:45,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281998036] [2021-11-12 23:35:45,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281998036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:45,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888550710] [2021-11-12 23:35:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:45,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:45,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:45,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:35:45,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:35:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:35:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:35:46,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888550710] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:46,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:35:46,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:35:46,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355105969] [2021-11-12 23:35:46,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:46,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:46,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:46,566 INFO L87 Difference]: Start difference. First operand 2175 states and 4063 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:47,163 INFO L93 Difference]: Finished difference Result 3220 states and 5658 transitions. [2021-11-12 23:35:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:47,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-11-12 23:35:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:47,185 INFO L225 Difference]: With dead ends: 3220 [2021-11-12 23:35:47,185 INFO L226 Difference]: Without dead ends: 2691 [2021-11-12 23:35:47,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:47,190 INFO L933 BasicCegarLoop]: 3288 mSDtfsCounter, 3464 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 401.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.92ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 476.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:47,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3464 Valid, 3460 Invalid, 297 Unknown, 0 Unchecked, 11.92ms Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 476.36ms Time] [2021-11-12 23:35:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-11-12 23:35:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2683. [2021-11-12 23:35:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2491 states have (on average 1.818948213568848) internal successors, (4531), 2498 states have internal predecessors, (4531), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2021-11-12 23:35:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 4813 transitions. [2021-11-12 23:35:47,341 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 4813 transitions. Word has length 109 [2021-11-12 23:35:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:47,343 INFO L470 AbstractCegarLoop]: Abstraction has 2683 states and 4813 transitions. [2021-11-12 23:35:47,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 4813 transitions. [2021-11-12 23:35:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:35:47,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:47,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:47,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:47,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:47,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1457778639, now seen corresponding path program 1 times [2021-11-12 23:35:47,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:47,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841680946] [2021-11-12 23:35:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:47,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:47,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:47,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841680946] [2021-11-12 23:35:47,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841680946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:47,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862794817] [2021-11-12 23:35:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:47,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:47,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:47,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:35:47,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:35:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:35:47,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:35:48,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:35:48,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862794817] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:48,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:35:48,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:35:48,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124313159] [2021-11-12 23:35:48,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:48,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:48,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:48,418 INFO L87 Difference]: Start difference. First operand 2683 states and 4813 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:48,962 INFO L93 Difference]: Finished difference Result 4732 states and 7926 transitions. [2021-11-12 23:35:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-11-12 23:35:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:48,996 INFO L225 Difference]: With dead ends: 4732 [2021-11-12 23:35:48,997 INFO L226 Difference]: Without dead ends: 3695 [2021-11-12 23:35:49,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:49,004 INFO L933 BasicCegarLoop]: 3253 mSDtfsCounter, 3461 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 333.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 408.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:49,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3461 Valid, 3425 Invalid, 293 Unknown, 0 Unchecked, 7.57ms Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 408.94ms Time] [2021-11-12 23:35:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-11-12 23:35:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3683. [2021-11-12 23:35:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3315 states have (on average 1.7324283559577678) internal successors, (5743), 3326 states have internal predecessors, (5743), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2021-11-12 23:35:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6281 transitions. [2021-11-12 23:35:49,183 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6281 transitions. Word has length 109 [2021-11-12 23:35:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:49,184 INFO L470 AbstractCegarLoop]: Abstraction has 3683 states and 6281 transitions. [2021-11-12 23:35:49,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6281 transitions. [2021-11-12 23:35:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:35:49,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:49,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:49,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:49,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-12 23:35:49,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:49,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash 175404689, now seen corresponding path program 1 times [2021-11-12 23:35:49,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:49,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550893903] [2021-11-12 23:35:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:49,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:35:49,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:49,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550893903] [2021-11-12 23:35:49,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550893903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:49,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379307215] [2021-11-12 23:35:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:49,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:49,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:49,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:35:49,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:35:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:49,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:35:49,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:35:49,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:35:50,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379307215] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:50,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:35:50,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:35:50,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834652041] [2021-11-12 23:35:50,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:50,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:50,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:50,234 INFO L87 Difference]: Start difference. First operand 3683 states and 6281 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:50,895 INFO L93 Difference]: Finished difference Result 7708 states and 12362 transitions. [2021-11-12 23:35:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:50,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-11-12 23:35:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:50,949 INFO L225 Difference]: With dead ends: 7708 [2021-11-12 23:35:50,949 INFO L226 Difference]: Without dead ends: 5671 [2021-11-12 23:35:50,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:50,962 INFO L933 BasicCegarLoop]: 3253 mSDtfsCounter, 3449 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 364.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.21ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 448.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:50,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3449 Valid, 3425 Invalid, 293 Unknown, 0 Unchecked, 8.21ms Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 448.05ms Time] [2021-11-12 23:35:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5671 states. [2021-11-12 23:35:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5671 to 5651. [2021-11-12 23:35:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5651 states, 4939 states have (on average 1.643855031382871) internal successors, (8119), 4958 states have internal predecessors, (8119), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2021-11-12 23:35:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5651 states to 5651 states and 9153 transitions. [2021-11-12 23:35:51,289 INFO L78 Accepts]: Start accepts. Automaton has 5651 states and 9153 transitions. Word has length 109 [2021-11-12 23:35:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:51,290 INFO L470 AbstractCegarLoop]: Abstraction has 5651 states and 9153 transitions. [2021-11-12 23:35:51,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:35:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5651 states and 9153 transitions. [2021-11-12 23:35:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:35:51,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:51,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:51,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:51,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:35:51,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash -747934479, now seen corresponding path program 1 times [2021-11-12 23:35:51,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:51,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595083609] [2021-11-12 23:35:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:51,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:35:51,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:51,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595083609] [2021-11-12 23:35:51,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595083609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:51,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:51,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:35:51,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45264857] [2021-11-12 23:35:51,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:51,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:51,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:51,641 INFO L87 Difference]: Start difference. First operand 5651 states and 9153 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:35:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:52,341 INFO L93 Difference]: Finished difference Result 8775 states and 13908 transitions. [2021-11-12 23:35:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2021-11-12 23:35:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:52,441 INFO L225 Difference]: With dead ends: 8775 [2021-11-12 23:35:52,441 INFO L226 Difference]: Without dead ends: 6707 [2021-11-12 23:35:52,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:52,455 INFO L933 BasicCegarLoop]: 3331 mSDtfsCounter, 91 mSDsluCounter, 3490 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 405.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6576 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.41ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 491.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:52,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 6576 Invalid, 522 Unknown, 0 Unchecked, 11.41ms Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 491.38ms Time] [2021-11-12 23:35:52,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2021-11-12 23:35:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6371. [2021-11-12 23:35:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6371 states, 5627 states have (on average 1.6532788341922873) internal successors, (9303), 5646 states have internal predecessors, (9303), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2021-11-12 23:35:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6371 states to 6371 states and 10369 transitions. [2021-11-12 23:35:52,937 INFO L78 Accepts]: Start accepts. Automaton has 6371 states and 10369 transitions. Word has length 109 [2021-11-12 23:35:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:52,938 INFO L470 AbstractCegarLoop]: Abstraction has 6371 states and 10369 transitions. [2021-11-12 23:35:52,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:35:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6371 states and 10369 transitions. [2021-11-12 23:35:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:35:52,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:52,964 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:35:52,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:35:52,964 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:52,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1440315102, now seen corresponding path program 1 times [2021-11-12 23:35:52,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:52,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542314579] [2021-11-12 23:35:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:52,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:35:53,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:53,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542314579] [2021-11-12 23:35:53,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542314579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:53,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:53,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:35:53,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537419001] [2021-11-12 23:35:53,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:53,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:53,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:53,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:53,081 INFO L87 Difference]: Start difference. First operand 6371 states and 10369 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:35:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:53,902 INFO L93 Difference]: Finished difference Result 15676 states and 24586 transitions. [2021-11-12 23:35:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:53,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2021-11-12 23:35:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:53,956 INFO L225 Difference]: With dead ends: 15676 [2021-11-12 23:35:53,956 INFO L226 Difference]: Without dead ends: 10951 [2021-11-12 23:35:53,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:53,978 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 3451 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 373.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.47ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 452.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:53,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3451 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 10.47ms Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 452.32ms Time] [2021-11-12 23:35:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10951 states. [2021-11-12 23:35:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10951 to 10899. [2021-11-12 23:35:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10899 states, 9451 states have (on average 1.5887207702888584) internal successors, (15015), 9486 states have internal predecessors, (15015), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2021-11-12 23:35:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10899 states to 10899 states and 17073 transitions. [2021-11-12 23:35:54,568 INFO L78 Accepts]: Start accepts. Automaton has 10899 states and 17073 transitions. Word has length 147 [2021-11-12 23:35:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:54,570 INFO L470 AbstractCegarLoop]: Abstraction has 10899 states and 17073 transitions. [2021-11-12 23:35:54,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:35:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 10899 states and 17073 transitions. [2021-11-12 23:35:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:35:54,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:54,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:35:54,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:35:54,611 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:54,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1578492942, now seen corresponding path program 1 times [2021-11-12 23:35:54,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:54,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415714715] [2021-11-12 23:35:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:54,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:35:54,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:54,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415714715] [2021-11-12 23:35:54,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415714715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:54,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:54,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:35:54,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399553249] [2021-11-12 23:35:54,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:54,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:54,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:54,732 INFO L87 Difference]: Start difference. First operand 10899 states and 17073 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:35:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:55,777 INFO L93 Difference]: Finished difference Result 29116 states and 44698 transitions. [2021-11-12 23:35:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2021-11-12 23:35:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:56,043 INFO L225 Difference]: With dead ends: 29116 [2021-11-12 23:35:56,044 INFO L226 Difference]: Without dead ends: 19863 [2021-11-12 23:35:56,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:56,078 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 3453 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 367.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 442.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:56,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3453 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 8.26ms Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 442.06ms Time] [2021-11-12 23:35:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19863 states. [2021-11-12 23:35:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19863 to 19763. [2021-11-12 23:35:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19763 states, 16939 states have (on average 1.5419446248302733) internal successors, (26119), 17006 states have internal predecessors, (26119), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2021-11-12 23:35:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19763 states to 19763 states and 30097 transitions. [2021-11-12 23:35:56,962 INFO L78 Accepts]: Start accepts. Automaton has 19763 states and 30097 transitions. Word has length 147 [2021-11-12 23:35:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:56,963 INFO L470 AbstractCegarLoop]: Abstraction has 19763 states and 30097 transitions. [2021-11-12 23:35:56,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:35:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 19763 states and 30097 transitions. [2021-11-12 23:35:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:35:57,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:57,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:35:57,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:35:57,044 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash -579036697, now seen corresponding path program 1 times [2021-11-12 23:35:57,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:35:57,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517452196] [2021-11-12 23:35:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:57,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:35:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:35:57,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:35:57,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517452196] [2021-11-12 23:35:57,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517452196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:57,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:57,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:35:57,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724737280] [2021-11-12 23:35:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:57,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:35:57,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:35:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:35:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:57,158 INFO L87 Difference]: Start difference. First operand 19763 states and 30097 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:35:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:58,734 INFO L93 Difference]: Finished difference Result 55420 states and 83738 transitions. [2021-11-12 23:35:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:35:58,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2021-11-12 23:35:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:58,950 INFO L225 Difference]: With dead ends: 55420 [2021-11-12 23:35:58,950 INFO L226 Difference]: Without dead ends: 37303 [2021-11-12 23:35:59,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:35:59,037 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 3455 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 419.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:59,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3455 Valid, 3427 Invalid, 291 Unknown, 0 Unchecked, 8.16ms Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 419.51ms Time] [2021-11-12 23:35:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37303 states. [2021-11-12 23:36:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37303 to 37107. [2021-11-12 23:36:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37107 states, 31595 states have (on average 1.5093210951099858) internal successors, (47687), 31726 states have internal predecessors, (47687), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2021-11-12 23:36:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37107 states to 37107 states and 55377 transitions. [2021-11-12 23:36:01,229 INFO L78 Accepts]: Start accepts. Automaton has 37107 states and 55377 transitions. Word has length 147 [2021-11-12 23:36:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:01,229 INFO L470 AbstractCegarLoop]: Abstraction has 37107 states and 55377 transitions. [2021-11-12 23:36:01,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:36:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37107 states and 55377 transitions. [2021-11-12 23:36:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:36:01,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:01,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:36:01,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:36:01,343 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:01,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1289534879, now seen corresponding path program 1 times [2021-11-12 23:36:01,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:01,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820842361] [2021-11-12 23:36:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:01,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:36:01,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:01,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820842361] [2021-11-12 23:36:01,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820842361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:01,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:01,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:01,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923235978] [2021-11-12 23:36:01,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:01,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:01,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:01,440 INFO L87 Difference]: Start difference. First operand 37107 states and 55377 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:36:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:04,123 INFO L93 Difference]: Finished difference Result 106876 states and 159450 transitions. [2021-11-12 23:36:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2021-11-12 23:36:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:04,453 INFO L225 Difference]: With dead ends: 106876 [2021-11-12 23:36:04,453 INFO L226 Difference]: Without dead ends: 71415 [2021-11-12 23:36:04,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:04,848 INFO L933 BasicCegarLoop]: 3270 mSDtfsCounter, 3458 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.40ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 321.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:04,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3458 Valid, 3442 Invalid, 292 Unknown, 0 Unchecked, 6.40ms Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 321.97ms Time] [2021-11-12 23:36:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71415 states. [2021-11-12 23:36:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71415 to 71027. [2021-11-12 23:36:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71027 states, 60267 states have (on average 1.485771649493089) internal successors, (89543), 60526 states have internal predecessors, (89543), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2021-11-12 23:36:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71027 states to 71027 states and 104401 transitions. [2021-11-12 23:36:08,549 INFO L78 Accepts]: Start accepts. Automaton has 71027 states and 104401 transitions. Word has length 147 [2021-11-12 23:36:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:08,549 INFO L470 AbstractCegarLoop]: Abstraction has 71027 states and 104401 transitions. [2021-11-12 23:36:08,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:36:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 71027 states and 104401 transitions. [2021-11-12 23:36:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:36:08,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:08,781 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:36:08,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:36:08,782 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1938494326, now seen corresponding path program 1 times [2021-11-12 23:36:08,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:08,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965438325] [2021-11-12 23:36:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:08,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:36:08,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:08,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965438325] [2021-11-12 23:36:08,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965438325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:08,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:36:08,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:36:08,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804528555] [2021-11-12 23:36:08,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:08,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:36:08,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:36:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:08,882 INFO L87 Difference]: Start difference. First operand 71027 states and 104401 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:36:13,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:13,328 INFO L93 Difference]: Finished difference Result 184187 states and 274647 transitions. [2021-11-12 23:36:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:36:13,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2021-11-12 23:36:13,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:14,289 INFO L225 Difference]: With dead ends: 184187 [2021-11-12 23:36:14,289 INFO L226 Difference]: Without dead ends: 114807 [2021-11-12 23:36:14,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:36:14,519 INFO L933 BasicCegarLoop]: 3285 mSDtfsCounter, 109 mSDsluCounter, 3486 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 768.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6528 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.28ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 864.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:14,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 6528 Invalid, 508 Unknown, 0 Unchecked, 12.28ms Time], IncrementalHoareTripleChecker [3 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 864.52ms Time] [2021-11-12 23:36:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114807 states. [2021-11-12 23:36:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114807 to 100731. [2021-11-12 23:36:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100731 states, 88431 states have (on average 1.551073718492384) internal successors, (137163), 88691 states have internal predecessors, (137163), 8200 states have call successors, (8200), 4099 states have call predecessors, (8200), 4098 states have return successors, (8198), 7941 states have call predecessors, (8198), 8198 states have call successors, (8198) [2021-11-12 23:36:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100731 states to 100731 states and 153561 transitions. [2021-11-12 23:36:20,955 INFO L78 Accepts]: Start accepts. Automaton has 100731 states and 153561 transitions. Word has length 168 [2021-11-12 23:36:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:20,971 INFO L470 AbstractCegarLoop]: Abstraction has 100731 states and 153561 transitions. [2021-11-12 23:36:20,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:36:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 100731 states and 153561 transitions. [2021-11-12 23:36:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:36:21,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:21,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:36:21,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:36:21,245 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash 308881740, now seen corresponding path program 2 times [2021-11-12 23:36:21,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:21,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351785048] [2021-11-12 23:36:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:21,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:36:21,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:21,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351785048] [2021-11-12 23:36:21,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351785048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:21,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264685875] [2021-11-12 23:36:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:36:21,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:36:21,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:21,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:36:21,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:36:21,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:36:21,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:36:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:36:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:36:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-12 23:36:22,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264685875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:22,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:36:22,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2021-11-12 23:36:22,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410711899] [2021-11-12 23:36:22,157 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:22,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:22,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:36:22,161 INFO L87 Difference]: Start difference. First operand 100731 states and 153561 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:36:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:25,689 INFO L93 Difference]: Finished difference Result 151683 states and 233439 transitions. [2021-11-12 23:36:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 168 [2021-11-12 23:36:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:26,131 INFO L225 Difference]: With dead ends: 151683 [2021-11-12 23:36:26,132 INFO L226 Difference]: Without dead ends: 100991 [2021-11-12 23:36:26,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:36:26,274 INFO L933 BasicCegarLoop]: 3402 mSDtfsCounter, 3652 mSDsluCounter, 3598 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 494.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3652 SdHoareTripleChecker+Valid, 6722 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.69ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 604.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:26,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3652 Valid, 6722 Invalid, 659 Unknown, 0 Unchecked, 12.69ms Time], IncrementalHoareTripleChecker [5 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 604.27ms Time] [2021-11-12 23:36:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100991 states. [2021-11-12 23:36:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100991 to 99707. [2021-11-12 23:36:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99707 states, 87407 states have (on average 1.5370279268250826) internal successors, (134347), 87667 states have internal predecessors, (134347), 8200 states have call successors, (8200), 4099 states have call predecessors, (8200), 4098 states have return successors, (8198), 7941 states have call predecessors, (8198), 8198 states have call successors, (8198) [2021-11-12 23:36:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99707 states to 99707 states and 150745 transitions. [2021-11-12 23:36:31,098 INFO L78 Accepts]: Start accepts. Automaton has 99707 states and 150745 transitions. Word has length 168 [2021-11-12 23:36:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:31,099 INFO L470 AbstractCegarLoop]: Abstraction has 99707 states and 150745 transitions. [2021-11-12 23:36:31,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:36:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 99707 states and 150745 transitions. [2021-11-12 23:36:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:36:31,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:31,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:36:31,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:31,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:36:31,631 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1282370699, now seen corresponding path program 1 times [2021-11-12 23:36:31,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:31,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070896512] [2021-11-12 23:36:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:31,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:36:31,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:31,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070896512] [2021-11-12 23:36:31,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070896512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:31,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775832489] [2021-11-12 23:36:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:31,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:36:31,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:31,804 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:36:31,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cac6911-6368-42eb-817f-bd3e767c76cf/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:36:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:32,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:36:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:36:32,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-12 23:36:32,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775832489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:32,767 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:36:32,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2021-11-12 23:36:32,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829719196] [2021-11-12 23:36:32,768 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:32,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:36:32,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:36:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:36:32,770 INFO L87 Difference]: Start difference. First operand 99707 states and 150745 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:36:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:38,333 INFO L93 Difference]: Finished difference Result 199683 states and 301535 transitions. [2021-11-12 23:36:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 168 [2021-11-12 23:36:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:38,869 INFO L225 Difference]: With dead ends: 199683 [2021-11-12 23:36:38,869 INFO L226 Difference]: Without dead ends: 150527 [2021-11-12 23:36:38,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:36:38,992 INFO L933 BasicCegarLoop]: 3384 mSDtfsCounter, 334 mSDsluCounter, 3543 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 454.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 6675 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.35ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 556.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:38,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 6675 Invalid, 557 Unknown, 0 Unchecked, 14.35ms Time], IncrementalHoareTripleChecker [18 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 556.48ms Time] [2021-11-12 23:36:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150527 states.