./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:01:20,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:01:20,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:01:20,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:01:20,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:01:20,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:01:20,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:01:20,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:01:20,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:01:20,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:01:20,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:01:20,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:01:20,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:01:20,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:01:20,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:01:20,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:01:20,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:01:20,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:01:20,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:01:20,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:01:20,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:01:20,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:01:20,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:01:20,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:01:20,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:01:20,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:01:20,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:01:20,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:01:20,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:01:20,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:01:20,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:01:20,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:01:20,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:01:20,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:01:20,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:01:20,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:01:20,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:01:20,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:01:20,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:01:20,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:01:20,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:01:20,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:01:20,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:01:20,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:01:20,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:01:20,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:01:20,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:01:20,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:01:20,334 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:01:20,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:01:20,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:01:20,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:01:20,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:01:20,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:01:20,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:01:20,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:01:20,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:01:20,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:01:20,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:01:20,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:01:20,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:01:20,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:01:20,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:01:20,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:01:20,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:01:20,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:01:20,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:01:20,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:01:20,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:01:20,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:01:20,340 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:01:20,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:01:20,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:01:20,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:01:20,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 [2021-11-02 23:01:20,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:01:20,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:01:20,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:01:20,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:01:20,719 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:01:20,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-02 23:01:20,788 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/data/407597bc3/f19ad7fb1bb54f0693c773d2e3e8ec00/FLAG32b1746ed [2021-11-02 23:01:21,609 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:01:21,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-11-02 23:01:21,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/data/407597bc3/f19ad7fb1bb54f0693c773d2e3e8ec00/FLAG32b1746ed [2021-11-02 23:01:22,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/data/407597bc3/f19ad7fb1bb54f0693c773d2e3e8ec00 [2021-11-02 23:01:22,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:01:22,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:01:22,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:01:22,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:01:22,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:01:22,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:01:22" (1/1) ... [2021-11-02 23:01:22,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f0ece8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:22, skipping insertion in model container [2021-11-02 23:01:22,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:01:22" (1/1) ... [2021-11-02 23:01:22,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:01:22,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:01:22,575 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_5e1a6b68-b3c6-483f-a57e-a40624322647/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-02 23:01:23,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:01:23,451 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:01:23,489 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_5e1a6b68-b3c6-483f-a57e-a40624322647/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-11-02 23:01:23,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:01:24,005 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:01:24,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24 WrapperNode [2021-11-02 23:01:24,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:01:24,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:01:24,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:01:24,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:01:24,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:01:24,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:01:24,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:01:24,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:01:24,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:01:24,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:01:24,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:01:24,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:01:24,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (1/1) ... [2021-11-02 23:01:24,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:01:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:25,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:01:25,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:01:25,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:01:25,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:01:25,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:01:25,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:01:29,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:01:29,339 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 23:01:29,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:01:29 BoogieIcfgContainer [2021-11-02 23:01:29,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:01:29,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:01:29,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:01:29,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:01:29,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:01:22" (1/3) ... [2021-11-02 23:01:29,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c03b466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:01:29, skipping insertion in model container [2021-11-02 23:01:29,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:01:24" (2/3) ... [2021-11-02 23:01:29,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c03b466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:01:29, skipping insertion in model container [2021-11-02 23:01:29,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:01:29" (3/3) ... [2021-11-02 23:01:29,354 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label06.c [2021-11-02 23:01:29,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:01:29,361 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:01:29,480 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:01:29,489 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=PETRI_NET, 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 [2021-11-02 23:01:29,490 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:01:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:01:29,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:29,541 INFO L513 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] [2021-11-02 23:01:29,542 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2021-11-02 23:01:29,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:29,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591910060] [2021-11-02 23:01:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:29,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:29,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:29,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591910060] [2021-11-02 23:01:29,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591910060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:29,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:29,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:01:29,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783419566] [2021-11-02 23:01:29,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:29,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:29,840 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:33,386 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-11-02 23:01:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 23:01:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:33,410 INFO L225 Difference]: With dead ends: 1667 [2021-11-02 23:01:33,411 INFO L226 Difference]: Without dead ends: 998 [2021-11-02 23:01:33,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-02 23:01:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-11-02 23:01:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-11-02 23:01:33,520 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 31 [2021-11-02 23:01:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:33,521 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-11-02 23:01:33,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-11-02 23:01:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 23:01:33,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:33,526 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:33,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:01:33,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1080324021, now seen corresponding path program 1 times [2021-11-02 23:01:33,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:33,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462515448] [2021-11-02 23:01:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:33,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:33,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:33,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462515448] [2021-11-02 23:01:33,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462515448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:33,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:33,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:01:33,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395341788] [2021-11-02 23:01:33,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:33,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:33,734 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:37,047 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-11-02 23:01:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-02 23:01:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:37,061 INFO L225 Difference]: With dead ends: 2841 [2021-11-02 23:01:37,061 INFO L226 Difference]: Without dead ends: 1861 [2021-11-02 23:01:37,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-02 23:01:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-11-02 23:01:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-11-02 23:01:37,138 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 96 [2021-11-02 23:01:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:37,140 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-11-02 23:01:37,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-11-02 23:01:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-02 23:01:37,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:37,154 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:37,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:01:37,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash 446171936, now seen corresponding path program 1 times [2021-11-02 23:01:37,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:37,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135952165] [2021-11-02 23:01:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:37,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:37,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:37,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135952165] [2021-11-02 23:01:37,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135952165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:37,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:37,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:01:37,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252654573] [2021-11-02 23:01:37,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:37,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:37,394 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:40,787 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-11-02 23:01:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-02 23:01:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:40,805 INFO L225 Difference]: With dead ends: 4591 [2021-11-02 23:01:40,806 INFO L226 Difference]: Without dead ends: 2736 [2021-11-02 23:01:40,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-11-02 23:01:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-11-02 23:01:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-11-02 23:01:40,888 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 136 [2021-11-02 23:01:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:40,889 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-11-02 23:01:40,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-11-02 23:01:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-02 23:01:40,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:40,892 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:40,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:01:40,893 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:40,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1180835985, now seen corresponding path program 1 times [2021-11-02 23:01:40,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:40,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829967940] [2021-11-02 23:01:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:40,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:41,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:41,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829967940] [2021-11-02 23:01:41,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829967940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:41,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:41,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:41,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612146262] [2021-11-02 23:01:41,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:01:41,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:41,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:01:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:01:41,090 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:43,957 INFO L93 Difference]: Finished difference Result 5012 states and 6951 transitions. [2021-11-02 23:01:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:01:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-02 23:01:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:43,977 INFO L225 Difference]: With dead ends: 5012 [2021-11-02 23:01:43,977 INFO L226 Difference]: Without dead ends: 2298 [2021-11-02 23:01:43,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:01:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-11-02 23:01:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2282. [2021-11-02 23:01:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 1.3726435773783427) internal successors, (3131), 2281 states have internal predecessors, (3131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3131 transitions. [2021-11-02 23:01:44,040 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3131 transitions. Word has length 142 [2021-11-02 23:01:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:44,042 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 3131 transitions. [2021-11-02 23:01:44,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3131 transitions. [2021-11-02 23:01:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:01:44,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:44,049 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 23:01:44,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:01:44,050 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:44,050 INFO L85 PathProgramCache]: Analyzing trace with hash 32523106, now seen corresponding path program 1 times [2021-11-02 23:01:44,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:44,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775553066] [2021-11-02 23:01:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:44,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 23:01:44,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:44,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775553066] [2021-11-02 23:01:44,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775553066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:44,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:44,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:01:44,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147819351] [2021-11-02 23:01:44,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:44,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:44,186 INFO L87 Difference]: Start difference. First operand 2282 states and 3131 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:46,436 INFO L93 Difference]: Finished difference Result 5850 states and 8323 transitions. [2021-11-02 23:01:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:46,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-02 23:01:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:46,461 INFO L225 Difference]: With dead ends: 5850 [2021-11-02 23:01:46,461 INFO L226 Difference]: Without dead ends: 3995 [2021-11-02 23:01:46,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-02 23:01:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-11-02 23:01:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-11-02 23:01:46,547 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 166 [2021-11-02 23:01:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:46,547 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-11-02 23:01:46,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-11-02 23:01:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-02 23:01:46,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:46,551 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 23:01:46,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:01:46,552 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2071979068, now seen corresponding path program 1 times [2021-11-02 23:01:46,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:46,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488862789] [2021-11-02 23:01:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:46,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:46,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:46,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488862789] [2021-11-02 23:01:46,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488862789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:46,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:46,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:46,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311746585] [2021-11-02 23:01:46,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:46,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:46,655 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:49,114 INFO L93 Difference]: Finished difference Result 7992 states and 10495 transitions. [2021-11-02 23:01:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-02 23:01:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:49,140 INFO L225 Difference]: With dead ends: 7992 [2021-11-02 23:01:49,140 INFO L226 Difference]: Without dead ends: 4852 [2021-11-02 23:01:49,144 INFO L786 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 [2021-11-02 23:01:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-11-02 23:01:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4852. [2021-11-02 23:01:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-11-02 23:01:49,250 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 179 [2021-11-02 23:01:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:49,250 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-11-02 23:01:49,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-11-02 23:01:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-02 23:01:49,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:49,254 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 23:01:49,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:01:49,254 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 851513907, now seen corresponding path program 1 times [2021-11-02 23:01:49,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:49,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109513675] [2021-11-02 23:01:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:49,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:01:49,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:49,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109513675] [2021-11-02 23:01:49,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109513675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:49,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:49,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:49,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883113421] [2021-11-02 23:01:49,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:49,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:49,380 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:51,932 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-11-02 23:01:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-02 23:01:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:51,970 INFO L225 Difference]: With dead ends: 12249 [2021-11-02 23:01:51,970 INFO L226 Difference]: Without dead ends: 7399 [2021-11-02 23:01:51,977 INFO L786 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 [2021-11-02 23:01:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-11-02 23:01:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-11-02 23:01:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-11-02 23:01:52,102 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 185 [2021-11-02 23:01:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:52,103 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-11-02 23:01:52,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-11-02 23:01:52,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-02 23:01:52,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:52,107 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 23:01:52,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:01:52,107 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:52,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1071805537, now seen corresponding path program 1 times [2021-11-02 23:01:52,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:52,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486632340] [2021-11-02 23:01:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:52,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:01:52,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486632340] [2021-11-02 23:01:52,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486632340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:52,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:52,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:52,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49907290] [2021-11-02 23:01:52,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:52,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:52,204 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:54,894 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2021-11-02 23:01:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:54,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-11-02 23:01:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:54,930 INFO L225 Difference]: With dead ends: 13481 [2021-11-02 23:01:54,930 INFO L226 Difference]: Without dead ends: 8657 [2021-11-02 23:01:54,937 INFO L786 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 [2021-11-02 23:01:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2021-11-02 23:01:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2021-11-02 23:01:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2021-11-02 23:01:55,153 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 198 [2021-11-02 23:01:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:55,154 INFO L470 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2021-11-02 23:01:55,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2021-11-02 23:01:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-02 23:01:55,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:55,160 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:55,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:01:55,160 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 830636259, now seen corresponding path program 1 times [2021-11-02 23:01:55,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:55,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775251335] [2021-11-02 23:01:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:55,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:01:55,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:55,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775251335] [2021-11-02 23:01:55,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775251335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:55,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:55,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:55,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197925809] [2021-11-02 23:01:55,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:55,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:55,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:55,278 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:58,398 INFO L93 Difference]: Finished difference Result 18607 states and 23435 transitions. [2021-11-02 23:01:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-11-02 23:01:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:58,431 INFO L225 Difference]: With dead ends: 18607 [2021-11-02 23:01:58,431 INFO L226 Difference]: Without dead ends: 10379 [2021-11-02 23:01:58,441 INFO L786 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 [2021-11-02 23:01:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2021-11-02 23:01:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10371. [2021-11-02 23:01:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10371 states, 10370 states have (on average 1.2060752169720348) internal successors, (12507), 10370 states have internal predecessors, (12507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10371 states to 10371 states and 12507 transitions. [2021-11-02 23:01:58,633 INFO L78 Accepts]: Start accepts. Automaton has 10371 states and 12507 transitions. Word has length 247 [2021-11-02 23:01:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:58,634 INFO L470 AbstractCegarLoop]: Abstraction has 10371 states and 12507 transitions. [2021-11-02 23:01:58,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10371 states and 12507 transitions. [2021-11-02 23:01:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-02 23:01:58,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:58,640 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:58,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:01:58,641 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:58,642 INFO L85 PathProgramCache]: Analyzing trace with hash 571478886, now seen corresponding path program 1 times [2021-11-02 23:01:58,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:58,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476941528] [2021-11-02 23:01:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:58,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 196 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:01:58,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:58,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476941528] [2021-11-02 23:01:58,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476941528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:58,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591420459] [2021-11-02 23:01:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:58,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:58,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:58,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:58,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:01:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:58,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:01:58,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 196 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:02:00,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591420459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:00,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:00,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-02 23:02:00,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220717143] [2021-11-02 23:02:00,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:02:00,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:02:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:00,468 INFO L87 Difference]: Start difference. First operand 10371 states and 12507 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:04,783 INFO L93 Difference]: Finished difference Result 26703 states and 32622 transitions. [2021-11-02 23:02:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:02:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-11-02 23:02:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:04,813 INFO L225 Difference]: With dead ends: 26703 [2021-11-02 23:02:04,813 INFO L226 Difference]: Without dead ends: 15909 [2021-11-02 23:02:04,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15909 states. [2021-11-02 23:02:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15909 to 15904. [2021-11-02 23:02:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15904 states, 15903 states have (on average 1.1557567754511728) internal successors, (18380), 15903 states have internal predecessors, (18380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15904 states to 15904 states and 18380 transitions. [2021-11-02 23:02:05,082 INFO L78 Accepts]: Start accepts. Automaton has 15904 states and 18380 transitions. Word has length 255 [2021-11-02 23:02:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:05,083 INFO L470 AbstractCegarLoop]: Abstraction has 15904 states and 18380 transitions. [2021-11-02 23:02:05,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 15904 states and 18380 transitions. [2021-11-02 23:02:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-02 23:02:05,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:05,090 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-02 23:02:05,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:05,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:05,316 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1351221799, now seen corresponding path program 1 times [2021-11-02 23:02:05,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:05,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808229166] [2021-11-02 23:02:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:05,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:02:05,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:05,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808229166] [2021-11-02 23:02:05,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808229166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:05,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:05,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:02:05,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190487669] [2021-11-02 23:02:05,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:02:05,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:02:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:05,497 INFO L87 Difference]: Start difference. First operand 15904 states and 18380 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:10,720 INFO L93 Difference]: Finished difference Result 41650 states and 48771 transitions. [2021-11-02 23:02:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:02:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2021-11-02 23:02:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:10,769 INFO L225 Difference]: With dead ends: 41650 [2021-11-02 23:02:10,769 INFO L226 Difference]: Without dead ends: 24039 [2021-11-02 23:02:10,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24039 states. [2021-11-02 23:02:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24039 to 21446. [2021-11-02 23:02:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21446 states, 21445 states have (on average 1.1515504779668921) internal successors, (24695), 21445 states have internal predecessors, (24695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21446 states to 21446 states and 24695 transitions. [2021-11-02 23:02:11,116 INFO L78 Accepts]: Start accepts. Automaton has 21446 states and 24695 transitions. Word has length 291 [2021-11-02 23:02:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:11,116 INFO L470 AbstractCegarLoop]: Abstraction has 21446 states and 24695 transitions. [2021-11-02 23:02:11,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 21446 states and 24695 transitions. [2021-11-02 23:02:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-02 23:02:11,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:11,128 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-02 23:02:11,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:02:11,129 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1311562389, now seen corresponding path program 1 times [2021-11-02 23:02:11,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:11,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817628546] [2021-11-02 23:02:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:11,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-02 23:02:11,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:11,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817628546] [2021-11-02 23:02:11,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817628546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:11,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:11,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:02:11,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152035426] [2021-11-02 23:02:11,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:11,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:11,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:02:11,293 INFO L87 Difference]: Start difference. First operand 21446 states and 24695 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:14,002 INFO L93 Difference]: Finished difference Result 52251 states and 60590 transitions. [2021-11-02 23:02:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2021-11-02 23:02:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:14,064 INFO L225 Difference]: With dead ends: 52251 [2021-11-02 23:02:14,064 INFO L226 Difference]: Without dead ends: 29104 [2021-11-02 23:02:14,082 INFO L786 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 [2021-11-02 23:02:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29104 states. [2021-11-02 23:02:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29104 to 28676. [2021-11-02 23:02:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28676 states, 28675 states have (on average 1.118814298169137) internal successors, (32082), 28675 states have internal predecessors, (32082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28676 states to 28676 states and 32082 transitions. [2021-11-02 23:02:14,485 INFO L78 Accepts]: Start accepts. Automaton has 28676 states and 32082 transitions. Word has length 359 [2021-11-02 23:02:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:14,486 INFO L470 AbstractCegarLoop]: Abstraction has 28676 states and 32082 transitions. [2021-11-02 23:02:14,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 28676 states and 32082 transitions. [2021-11-02 23:02:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-11-02 23:02:14,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:14,499 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:14,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:02:14,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 949518367, now seen corresponding path program 1 times [2021-11-02 23:02:14,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:14,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137526374] [2021-11-02 23:02:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:14,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:02:14,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:14,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137526374] [2021-11-02 23:02:14,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137526374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:14,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:14,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:02:14,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448705441] [2021-11-02 23:02:14,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:14,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:02:14,663 INFO L87 Difference]: Start difference. First operand 28676 states and 32082 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:17,308 INFO L93 Difference]: Finished difference Result 65851 states and 74366 transitions. [2021-11-02 23:02:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:17,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-11-02 23:02:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:17,342 INFO L225 Difference]: With dead ends: 65851 [2021-11-02 23:02:17,342 INFO L226 Difference]: Without dead ends: 36327 [2021-11-02 23:02:17,362 INFO L786 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 [2021-11-02 23:02:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36327 states. [2021-11-02 23:02:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36327 to 29092. [2021-11-02 23:02:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29092 states, 29091 states have (on average 1.1156715135265203) internal successors, (32456), 29091 states have internal predecessors, (32456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29092 states to 29092 states and 32456 transitions. [2021-11-02 23:02:17,811 INFO L78 Accepts]: Start accepts. Automaton has 29092 states and 32456 transitions. Word has length 373 [2021-11-02 23:02:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:17,813 INFO L470 AbstractCegarLoop]: Abstraction has 29092 states and 32456 transitions. [2021-11-02 23:02:17,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29092 states and 32456 transitions. [2021-11-02 23:02:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-02 23:02:17,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:17,837 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-02 23:02:17,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:02:17,837 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1352739045, now seen corresponding path program 1 times [2021-11-02 23:02:17,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:17,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430440714] [2021-11-02 23:02:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:17,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 23:02:18,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:18,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430440714] [2021-11-02 23:02:18,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430440714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:18,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:18,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:02:18,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350065175] [2021-11-02 23:02:18,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:18,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:02:18,050 INFO L87 Difference]: Start difference. First operand 29092 states and 32456 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:20,586 INFO L93 Difference]: Finished difference Result 65445 states and 73569 transitions. [2021-11-02 23:02:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:20,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 400 [2021-11-02 23:02:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:20,624 INFO L225 Difference]: With dead ends: 65445 [2021-11-02 23:02:20,624 INFO L226 Difference]: Without dead ends: 36780 [2021-11-02 23:02:20,641 INFO L786 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 [2021-11-02 23:02:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36780 states. [2021-11-02 23:02:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36780 to 35059. [2021-11-02 23:02:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35059 states, 35058 states have (on average 1.1252495863996805) internal successors, (39449), 35058 states have internal predecessors, (39449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35059 states to 35059 states and 39449 transitions. [2021-11-02 23:02:21,036 INFO L78 Accepts]: Start accepts. Automaton has 35059 states and 39449 transitions. Word has length 400 [2021-11-02 23:02:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:21,037 INFO L470 AbstractCegarLoop]: Abstraction has 35059 states and 39449 transitions. [2021-11-02 23:02:21,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 35059 states and 39449 transitions. [2021-11-02 23:02:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-02 23:02:21,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:21,054 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-02 23:02:21,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:02:21,055 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2097456585, now seen corresponding path program 1 times [2021-11-02 23:02:21,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:21,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136316502] [2021-11-02 23:02:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:21,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 301 proven. 29 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 23:02:21,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:21,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136316502] [2021-11-02 23:02:21,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136316502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:21,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443933113] [2021-11-02 23:02:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:21,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:21,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:21,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:21,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:02:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:02:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 387 proven. 82 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-02 23:02:22,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443933113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:22,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:22,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-11-02 23:02:22,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064251230] [2021-11-02 23:02:22,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:02:22,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:02:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:02:22,946 INFO L87 Difference]: Start difference. First operand 35059 states and 39449 transitions. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:29,963 INFO L93 Difference]: Finished difference Result 100351 states and 112625 transitions. [2021-11-02 23:02:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:02:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2021-11-02 23:02:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:30,188 INFO L225 Difference]: With dead ends: 100351 [2021-11-02 23:02:30,188 INFO L226 Difference]: Without dead ends: 63141 [2021-11-02 23:02:30,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:02:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63141 states. [2021-11-02 23:02:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63141 to 52883. [2021-11-02 23:02:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52883 states, 52882 states have (on average 1.1006580689081351) internal successors, (58205), 52882 states have internal predecessors, (58205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52883 states to 52883 states and 58205 transitions. [2021-11-02 23:02:30,869 INFO L78 Accepts]: Start accepts. Automaton has 52883 states and 58205 transitions. Word has length 411 [2021-11-02 23:02:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:30,869 INFO L470 AbstractCegarLoop]: Abstraction has 52883 states and 58205 transitions. [2021-11-02 23:02:30,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 52883 states and 58205 transitions. [2021-11-02 23:02:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-11-02 23:02:30,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:30,896 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:30,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:31,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:31,124 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 500106253, now seen corresponding path program 1 times [2021-11-02 23:02:31,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:31,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154703586] [2021-11-02 23:02:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:31,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 23:02:31,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:31,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154703586] [2021-11-02 23:02:31,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154703586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:31,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:31,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:02:31,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587691015] [2021-11-02 23:02:31,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:31,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:02:31,412 INFO L87 Difference]: Start difference. First operand 52883 states and 58205 transitions. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:34,428 INFO L93 Difference]: Finished difference Result 122794 states and 135598 transitions. [2021-11-02 23:02:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:34,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 497 [2021-11-02 23:02:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:34,500 INFO L225 Difference]: With dead ends: 122794 [2021-11-02 23:02:34,500 INFO L226 Difference]: Without dead ends: 69911 [2021-11-02 23:02:34,644 INFO L786 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 [2021-11-02 23:02:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69911 states. [2021-11-02 23:02:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69911 to 69051. [2021-11-02 23:02:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69051 states, 69050 states have (on average 1.0959594496741492) internal successors, (75676), 69050 states have internal predecessors, (75676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69051 states to 69051 states and 75676 transitions. [2021-11-02 23:02:35,528 INFO L78 Accepts]: Start accepts. Automaton has 69051 states and 75676 transitions. Word has length 497 [2021-11-02 23:02:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:35,529 INFO L470 AbstractCegarLoop]: Abstraction has 69051 states and 75676 transitions. [2021-11-02 23:02:35,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 69051 states and 75676 transitions. [2021-11-02 23:02:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-11-02 23:02:35,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:35,545 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 23:02:35,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:02:35,546 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:35,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:35,547 INFO L85 PathProgramCache]: Analyzing trace with hash 300395610, now seen corresponding path program 1 times [2021-11-02 23:02:35,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:35,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333157001] [2021-11-02 23:02:35,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:35,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-02 23:02:35,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:35,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333157001] [2021-11-02 23:02:35,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333157001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:35,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:35,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:02:35,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900548654] [2021-11-02 23:02:35,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:35,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:02:35,940 INFO L87 Difference]: Start difference. First operand 69051 states and 75676 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:38,524 INFO L93 Difference]: Finished difference Result 135967 states and 149047 transitions. [2021-11-02 23:02:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 497 [2021-11-02 23:02:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:38,588 INFO L225 Difference]: With dead ends: 135967 [2021-11-02 23:02:38,588 INFO L226 Difference]: Without dead ends: 67768 [2021-11-02 23:02:38,611 INFO L786 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 [2021-11-02 23:02:38,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67768 states. [2021-11-02 23:02:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67768 to 66488. [2021-11-02 23:02:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66488 states, 66487 states have (on average 1.0753831576097583) internal successors, (71499), 66487 states have internal predecessors, (71499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66488 states to 66488 states and 71499 transitions. [2021-11-02 23:02:39,712 INFO L78 Accepts]: Start accepts. Automaton has 66488 states and 71499 transitions. Word has length 497 [2021-11-02 23:02:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:39,712 INFO L470 AbstractCegarLoop]: Abstraction has 66488 states and 71499 transitions. [2021-11-02 23:02:39,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66488 states and 71499 transitions. [2021-11-02 23:02:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-11-02 23:02:39,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:39,761 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:39,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:02:39,762 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1528915042, now seen corresponding path program 1 times [2021-11-02 23:02:39,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:39,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512634338] [2021-11-02 23:02:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:39,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 698 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:02:40,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:40,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512634338] [2021-11-02 23:02:40,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512634338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:40,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:40,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:02:40,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778533727] [2021-11-02 23:02:40,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:02:40,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:02:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:40,036 INFO L87 Difference]: Start difference. First operand 66488 states and 71499 transitions. Second operand has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:44,256 INFO L93 Difference]: Finished difference Result 155975 states and 167792 transitions. [2021-11-02 23:02:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:02:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 557 [2021-11-02 23:02:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:44,350 INFO L225 Difference]: With dead ends: 155975 [2021-11-02 23:02:44,350 INFO L226 Difference]: Without dead ends: 90339 [2021-11-02 23:02:44,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90339 states. [2021-11-02 23:02:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90339 to 79272. [2021-11-02 23:02:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79272 states, 79271 states have (on average 1.0756140328745696) internal successors, (85265), 79271 states have internal predecessors, (85265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79272 states to 79272 states and 85265 transitions. [2021-11-02 23:02:45,628 INFO L78 Accepts]: Start accepts. Automaton has 79272 states and 85265 transitions. Word has length 557 [2021-11-02 23:02:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:45,629 INFO L470 AbstractCegarLoop]: Abstraction has 79272 states and 85265 transitions. [2021-11-02 23:02:45,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 79272 states and 85265 transitions. [2021-11-02 23:02:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2021-11-02 23:02:45,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:45,646 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:45,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:02:45,647 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1481817610, now seen corresponding path program 1 times [2021-11-02 23:02:45,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:45,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959681959] [2021-11-02 23:02:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:45,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-02 23:02:46,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:46,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959681959] [2021-11-02 23:02:46,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959681959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:46,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:46,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:02:46,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720709786] [2021-11-02 23:02:46,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:02:46,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:02:46,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:46,228 INFO L87 Difference]: Start difference. First operand 79272 states and 85265 transitions. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:50,110 INFO L93 Difference]: Finished difference Result 193473 states and 208068 transitions. [2021-11-02 23:02:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:02:50,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 571 [2021-11-02 23:02:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:50,233 INFO L225 Difference]: With dead ends: 193473 [2021-11-02 23:02:50,233 INFO L226 Difference]: Without dead ends: 115053 [2021-11-02 23:02:50,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115053 states. [2021-11-02 23:02:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115053 to 94186. [2021-11-02 23:02:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94186 states, 94185 states have (on average 1.0704464617508096) internal successors, (100820), 94185 states have internal predecessors, (100820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94186 states to 94186 states and 100820 transitions. [2021-11-02 23:02:51,788 INFO L78 Accepts]: Start accepts. Automaton has 94186 states and 100820 transitions. Word has length 571 [2021-11-02 23:02:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:51,789 INFO L470 AbstractCegarLoop]: Abstraction has 94186 states and 100820 transitions. [2021-11-02 23:02:51,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 94186 states and 100820 transitions. [2021-11-02 23:02:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2021-11-02 23:02:51,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:51,810 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:51,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:02:51,810 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:51,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1255310396, now seen corresponding path program 1 times [2021-11-02 23:02:51,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:51,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901713921] [2021-11-02 23:02:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:51,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-02 23:02:52,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:52,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901713921] [2021-11-02 23:02:52,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901713921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:52,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:52,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:02:52,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871887172] [2021-11-02 23:02:52,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:02:52,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:52,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:02:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:52,410 INFO L87 Difference]: Start difference. First operand 94186 states and 100820 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:56,850 INFO L93 Difference]: Finished difference Result 218212 states and 233428 transitions. [2021-11-02 23:02:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:02:56,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 584 [2021-11-02 23:02:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:56,977 INFO L225 Difference]: With dead ends: 218212 [2021-11-02 23:02:56,977 INFO L226 Difference]: Without dead ends: 122749 [2021-11-02 23:02:57,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:02:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122749 states. [2021-11-02 23:02:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122749 to 108652. [2021-11-02 23:02:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108652 states, 108651 states have (on average 1.070528573137845) internal successors, (116314), 108651 states have internal predecessors, (116314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108652 states to 108652 states and 116314 transitions. [2021-11-02 23:02:58,879 INFO L78 Accepts]: Start accepts. Automaton has 108652 states and 116314 transitions. Word has length 584 [2021-11-02 23:02:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:58,879 INFO L470 AbstractCegarLoop]: Abstraction has 108652 states and 116314 transitions. [2021-11-02 23:02:58,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 108652 states and 116314 transitions. [2021-11-02 23:02:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-11-02 23:02:58,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:58,896 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:58,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 23:02:58,896 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:58,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1890721902, now seen corresponding path program 1 times [2021-11-02 23:02:58,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:58,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561378849] [2021-11-02 23:02:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:58,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 422 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 23:02:59,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:59,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561378849] [2021-11-02 23:02:59,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561378849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:59,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773611587] [2021-11-02 23:02:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:59,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:59,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:02:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:02:59,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 301 proven. 29 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:03:01,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773611587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:03:01,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:01,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-02 23:03:01,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607698129] [2021-11-02 23:03:01,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:03:01,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:03:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:03:01,671 INFO L87 Difference]: Start difference. First operand 108652 states and 116314 transitions. Second operand has 6 states, 6 states have (on average 139.83333333333334) internal successors, (839), 6 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:10,098 INFO L93 Difference]: Finished difference Result 281226 states and 301047 transitions. [2021-11-02 23:03:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:03:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 139.83333333333334) internal successors, (839), 6 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 598 [2021-11-02 23:03:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:10,306 INFO L225 Difference]: With dead ends: 281226 [2021-11-02 23:03:10,306 INFO L226 Difference]: Without dead ends: 171721 [2021-11-02 23:03:10,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 598 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:03:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171721 states. [2021-11-02 23:03:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171721 to 156770. [2021-11-02 23:03:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156770 states, 156769 states have (on average 1.0668308147656744) internal successors, (167246), 156769 states have internal predecessors, (167246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156770 states to 156770 states and 167246 transitions. [2021-11-02 23:03:13,632 INFO L78 Accepts]: Start accepts. Automaton has 156770 states and 167246 transitions. Word has length 598 [2021-11-02 23:03:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:13,633 INFO L470 AbstractCegarLoop]: Abstraction has 156770 states and 167246 transitions. [2021-11-02 23:03:13,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.83333333333334) internal successors, (839), 6 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 156770 states and 167246 transitions. [2021-11-02 23:03:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2021-11-02 23:03:13,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:13,660 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:13,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-02 23:03:13,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1a6b68-b3c6-483f-a57e-a40624322647/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 23:03:13,876 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash -576076921, now seen corresponding path program 1 times [2021-11-02 23:03:13,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:13,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453045620] [2021-11-02 23:03:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:13,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 740 proven. 0 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-02 23:03:14,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:14,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453045620] [2021-11-02 23:03:14,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453045620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:14,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:14,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:03:14,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585495685] [2021-11-02 23:03:14,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:03:14,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:03:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:03:14,139 INFO L87 Difference]: Start difference. First operand 156770 states and 167246 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:17,645 INFO L93 Difference]: Finished difference Result 315669 states and 336987 transitions. [2021-11-02 23:03:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:03:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 607 [2021-11-02 23:03:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:17,824 INFO L225 Difference]: With dead ends: 315669 [2021-11-02 23:03:17,824 INFO L226 Difference]: Without dead ends: 159751 [2021-11-02 23:03:17,871 INFO L786 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 [2021-11-02 23:03:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159751 states. [2021-11-02 23:03:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159751 to 158036. [2021-11-02 23:03:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158036 states, 158035 states have (on average 1.0648590502103965) internal successors, (168285), 158035 states have internal predecessors, (168285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158036 states to 158036 states and 168285 transitions. [2021-11-02 23:03:20,462 INFO L78 Accepts]: Start accepts. Automaton has 158036 states and 168285 transitions. Word has length 607 [2021-11-02 23:03:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:20,462 INFO L470 AbstractCegarLoop]: Abstraction has 158036 states and 168285 transitions. [2021-11-02 23:03:20,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 158036 states and 168285 transitions. [2021-11-02 23:03:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-11-02 23:03:20,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:20,488 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:20,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:03:20,489 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:20,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1810715354, now seen corresponding path program 1 times [2021-11-02 23:03:20,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:20,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582576864] [2021-11-02 23:03:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:20,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-02 23:03:20,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:20,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582576864] [2021-11-02 23:03:20,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582576864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:20,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:20,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:03:20,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267811682] [2021-11-02 23:03:20,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:03:20,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:20,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:03:20,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:03:20,735 INFO L87 Difference]: Start difference. First operand 158036 states and 168285 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:24,549 INFO L93 Difference]: Finished difference Result 314802 states and 335354 transitions. [2021-11-02 23:03:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:03:24,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 617 [2021-11-02 23:03:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:24,744 INFO L225 Difference]: With dead ends: 314802 [2021-11-02 23:03:24,744 INFO L226 Difference]: Without dead ends: 157618 [2021-11-02 23:03:24,825 INFO L786 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 [2021-11-02 23:03:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157618 states. [2021-11-02 23:03:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157618 to 156761. [2021-11-02 23:03:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156761 states, 156760 states have (on average 1.0618142383261036) internal successors, (166450), 156760 states have internal predecessors, (166450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156761 states to 156761 states and 166450 transitions. [2021-11-02 23:03:27,696 INFO L78 Accepts]: Start accepts. Automaton has 156761 states and 166450 transitions. Word has length 617 [2021-11-02 23:03:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:27,697 INFO L470 AbstractCegarLoop]: Abstraction has 156761 states and 166450 transitions. [2021-11-02 23:03:27,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 156761 states and 166450 transitions. [2021-11-02 23:03:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2021-11-02 23:03:27,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:27,717 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:27,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 23:03:27,717 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1892915256, now seen corresponding path program 1 times [2021-11-02 23:03:27,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:03:27,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633036723] [2021-11-02 23:03:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:27,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:03:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:03:28,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:03:28,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633036723] [2021-11-02 23:03:28,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633036723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:28,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:28,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:03:28,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139484307] [2021-11-02 23:03:28,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:03:28,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:03:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:03:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:03:28,749 INFO L87 Difference]: Start difference. First operand 156761 states and 166450 transitions. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:32,153 INFO L93 Difference]: Finished difference Result 322489 states and 342728 transitions. [2021-11-02 23:03:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:03:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 625 [2021-11-02 23:03:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:33,122 INFO L225 Difference]: With dead ends: 322489 [2021-11-02 23:03:33,122 INFO L226 Difference]: Without dead ends: 166154 [2021-11-02 23:03:33,217 INFO L786 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 [2021-11-02 23:03:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166154 states.